KR101344426B1 - An apparatus for processing differential information of differential global navigation satellite system and the method thereof - Google Patents

Abstract

The present invention relates to an apparatus and method for processing correction information of a satellite navigation correction system, and more particularly, it relates to an apparatus and method for processing correction information of a satellite navigation correction system, in which correction information parameters are generated and coded into signals for a plurality of broadcasting / communication media, When the terminal can not receive the real-time correction information, the terminal can generate the correction information itself by using the correction information parameter and perform the positioning correction, and in the case where the terminal can not receive the real- A transmitter and receiver of correction information and correction information parameters of a satellite navigation correction system that enables positioning correction to be performed after generating correction information by itself using the information; And a method of generating and transmitting correction information.

Description

TECHNICAL FIELD [0001] The present invention relates to a correction information processing apparatus and method for a satellite navigation correction system,

More particularly, the present invention relates to an apparatus and method for processing correction information of a satellite navigation correction system (DGNSS), and more particularly, The satellite navigation correction system is capable of performing positioning correction even when it temporarily does not receive the real-time correction information, such as when it temporarily enters the service shaded area, by transmitting the correction information parameter, And a correction information parameter transmission / reception device; And a method of generating and transmitting correction information.

As a kind of technique (positioning technique) for measuring the position of a terminal, a signal is received from a plurality of satellites, and the distance from the terminal to each satellite is calculated using the signal to measure the coordinates of the point where the terminal is located Global Navigation Satellite System (GNSS) is now widespread.

The GNSS is a system for providing information on the position, altitude, and speed of an object on the ground using a satellite orbiting a space orbit. The GNSS is able to grasp precise location information with a resolution of 1 m or less and is widely applied not only for military use but also for private information such as location guidance, geodesic, emergency structure, and communication of transportation means such as aircraft, ship and automobile.

Specific examples of the GNSS include Global Positioning System (GPS) developed by the US Department of Defense, GLONASS (Global Navigation Satellite System), Galileo of the European Union, Beidou and others. In addition, efforts are being made to build GNSS in the form of readers or coalitions around the world.

When positioning using the GNSS, errors are added to the signal due to various factors in the process of transmitting signals from the satellites to the receiver, and there is a difference between the calculated pseudo range and the actual distance between the satellite and the receiver . Therefore, an error also occurs between the positioning result and the actual coordinates. In order to reduce the positioning error, various techniques for correcting an error occurring in the process of receiving a signal from a satellite to a receiver have been developed and applied to actual services.

Among the technologies for correcting the pseudorange errors, the DGNSS (Additional Global Navigation Satellite System), which is widely used due to its high efficiency in terms of real-time performance and cost, The pseudo range correction (PRC) is provided to the terminal in real time through a broadcasting network, a wired / wireless communication network, or a separate satellite, and the terminal is provided with a GNSS satellite And corrects the calculated pseudo range by using the pseudo distance correction information PRC, thereby obtaining a more accurate positioning result.

For reference, DGPS (Differential Global Positioning System), which is one kind of DGNSS, already receives GPS from a fixed point (reference station), calculates and corrects GPS error, It is a system that can confirm the position with better precision (eg position error 1 m). Currently, the DGNSS is provided through various media such as medium wave broadcasting, FM additional broadcasting, wired / wireless Internet, and DGNSS dedicated satellite. Technological developments are underway for application to terrestrial DMB (Digital Multimedia Broadcasting) and new broadcasting / communication media.

However, the above schemes differ in the manner of encoding the correction information according to the type of the medium, but the correction information provided through the medium is substantially the same as the pseudo distance correction information of the satellites observed at the reference station at the time of actually providing information , The correction information is provided in real time and the terminal receives the correction information and uses it to correct the pseudo range value of the satellites observed in the terminal.

Also, there is a technique of storing the satellite observations in the terminal without correcting the DGNSS scheme in real time, and repositioning the satellite observations using the correction information at the same time as the observation value is stored. However, And the correction information corresponding to the observed time is used is the same as the real-time correction. In addition, in the case of a terminal or a pedestrian terminal installed in a vehicle such as a vehicle, a ship, or a bicycle, a post-correction technique can not be used because it is necessary to perform positioning in real time while moving.

If the time at which the correction information is generated in the reference station is T1 and the time (current time) at which the pseudorange is calculated by observing the satellite on the terminal is T2, the correction information to be received by the terminal is generated at time T1 Is always the past time than the current time T2 of the terminal. That is, the correction information received by the terminal from the reference station is a value measured at a past time point rather than a value measured at the current time of the terminal. As the time difference between T1 and T2 approaches zero, the correction effect is large and the correction effect decreases as the time difference increases.

Therefore, when providing the correction information in the reference station, the time T1 at which the correction information is generated is provided together so that the terminal first checks the difference between the current time T2 and the correction information generation time T1. If the difference is smaller than the correction information use time limit Th Only the correction information is used. For example, if the difference between T2 and T1 is less than 60 seconds (Th), the correction information is used. If the difference is greater than T2, the correction information is not used. The correction information use time limit Th may be fixed by the user or may be fixed at the terminal production stage so that the user can not change it.

In a service that is actually provided, the DGNSS reference station generates correction information every second and is provided as a broadcasting / communication medium. Therefore, in an environment in which the terminal can reliably receive correction information, the correction information in which the difference between T1 and T2 is within a few seconds can be continuously received. However, if the state in which the terminal can not receive the correction information continues for a predetermined time (for example, 60 seconds), the correction information can not be used from that moment. The case where the terminal can not receive correction information is as follows.

1. When a problem occurs in the operation of the correction information providing unit,

2. If the terminal deviates from the calibration information providing service area,

3. When a problem occurs in the operation of the calibration information receiver of the terminal, the terminal can not receive the calibration information stably.

The background art of the present invention proposes a DGPS service using FM DARC (DATA Radio Channel) in satellite communication and space industry Vol. 8, No. 2, Vol. 19 (pp. 143-155, June 2000) A digital system using wireless Internet is disclosed in Korean Patent Registration No. 10-0564146 (Mar. 20, 2006). In addition, Korean Registered Utility Model No. 20-0375699 (2005.02.01) Digital Terrestrial DMB system and reception system using terrestrial DMB have been proposed in Korean Patent Registration No. 10-0977607 (2010. 08. 17) A method of transmitting and receiving correction information for correcting an error using a wireless Internet, a beacon signal or a DMB (Digital Multimedia Broadcast) There is a difference in the purpose, the configuration, and the effect from the method of transmitting and receiving the correction information parameter so that the terminal itself can generate the correction information when the real-time correction information is temporarily not received.

SUMMARY OF THE INVENTION The present invention was conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a mobile terminal that generates a correction information parameter for performing positioning correction when a terminal can not receive real- The present invention has been made in view of the above problems, and it is an object of the present invention to provide a correction information processing apparatus and method for a satellite navigation correction system that can encode a signal for a plurality of broadcast / communication media and transmit or receive the same.

It is another object of the present invention to provide a mobile terminal and a mobile terminal that can generate correction information by using the correction information received in the past even if the mobile terminal can not receive the real- And a method for processing the correction information of a satellite navigation correction system and a method thereof.

According to another aspect of the present invention, there is provided a correction information processing apparatus for a satellite navigation correction system, comprising: a plurality of ground reference stations for receiving signals from a plurality of GNSS satellites to generate real-time correction information of individual satellites; A satellite information storage unit for receiving and accumulating real-time correction information from the ground reference stations; A correction information parameter generator for generating a correction information parameter of each satellite by receiving the accumulated real time correction information and generating a message including at least one of a reference point, a satellite number, effective time information and a combination thereof; A TPEG type encoding unit configured to encode the correction information parameters of the individual satellites generated by the correction information parameter generating unit in a TPEG format; A data broadcast encoding unit for encoding the correction information parameter information message of individual satellites generated by the correction information parameter generating unit in a predetermined data broadcast format including a file format or a stream format; And a data broadcast transmission unit; And a data broadcasting coding unit for coding the signal generated by the TPEG type coding unit in a predetermined data broadcasting format including a file format or a stream format; And a data broadcast transmission unit; The digital broadcasting may include DAB, DAB +, DMB, AT-DMB, ATSC-M / H, digital radio broadcasting (including DRM, DRM + and a beacon. In order to transmit a correction information parameter information message of a plurality of individual satellites generated by the correction information parameter generation unit, Parameter HTTP server, correction information parameter providing correction information parameter by FTP protocol FTP server, correction information parameter socket server providing correction information parameter by socket communication, base station providing correction information parameter by short distance wireless communication, correction by beacon method And a base station that provides information parameters.

A method of processing correction information of a satellite navigation correction system according to the present invention includes a first step of receiving signals from a plurality of GNSS satellites and generating real-time correction information of individual satellites; And the real-time correction information of the individual satellites is received, and the correction information parameters of the individual satellites are generated using the real-time correction information, and then at least one of the reference point, satellite number, A second step of generating a message to be transmitted; A third step of encoding the correction information parameters of the individual satellites generated in the second step in TPEG format; A fourth step of encoding the calibration information parameter information message of the individual satellites generated in the second step into a predetermined data broadcasting format including a file format or a stream format; And a fifth step of transmitting data broadcasting; A sixth step of encoding the signal generated in the TPEG format and encoded in a predetermined data broadcasting format including a file format or a stream format in the third step; And data broadcast transmission; The digital broadcasting may include DAB, DAB +, DMB, AT-DMB, ATSC-M / H, digital radio broadcasting (including DRM, DRM + the method comprising the steps of: (a) providing a correction information parameter in accordance with an HTTP protocol to transmit a correction information parameter information message of a plurality of individual satellites generated in the second step; A tenth step of providing the correction information parameter by the socket communication, an eleventh step of providing the correction information parameter by the short distance wireless communication, a twelfth step of providing the correction information parameter by the beacon method, Or the like.

Meanwhile, the correction information processing apparatus of the satellite navigation correction system according to the present invention includes a GNSS receiver for extracting GNSS information including coordinates, time, velocity, and moving direction; A broadcast receiver for receiving a broadcast signal; A data broadcasting decoding unit for extracting and decoding a data broadcasting signal from the broadcasting signal; A correction information storage unit for extracting and storing real-time correction information and correction information parameters from the decoded data broadcasting signal; When the extracted real-time correction information includes data in which the real-time correction information is not received, the correction information storage unit stores the values of the correction information for the predetermined period previously stored in the correction information storage unit, A correction information optimization unit for generating correction information of the current point of time using at least one of correction information within an effective time stored in an average, a current correction information buffer, correction information parameters stored in the correction information storage unit, and combinations thereof; In order to achieve the above object, a correction information processing apparatus of a satellite navigation correction system according to the present invention is a GNSS which extracts GNSS information including coordinates, time, A receiving unit; A data receiving unit receiving data including real-time correction information and correction information parameters from at least one of a socket server, an HTTP server, an FTP server and a DSRC, a base station using a short-range wireless communication medium including UTIS and WAVE, and a base station using a beacon scheme; A correction information storage unit for extracting and storing real-time correction information and correction information parameters from the received data signal; When the extracted real-time correction information includes data in which the real-time correction information is not received, the correction information storage unit stores the values of the correction information for the predetermined period previously stored in the correction information storage unit, A correction information optimization unit for generating correction information of the current point of time using at least one of correction information within an effective time stored in an average, a current correction information buffer, correction information parameters stored in the correction information storage unit, and combinations thereof; The correction information optimizing unit may store the real-time correction information extracted from the data or the real-time correction information generated using the previously stored correction information or the correction information parameter as the latest correction information buffer and correction information And store it in a storage unit.

Also, a method of processing correction information of a satellite navigation correction system according to the present invention includes a first step of extracting GNSS information including coordinates, a time, a speed, and a moving direction through a GNSS receiver; A second step of receiving a broadcast signal through a broadcast receiver; A third step of extracting and decoding a data broadcasting signal from the broadcasting signal; A fourth step of extracting real-time correction information and correction information parameters from the decoded data broadcasting signal and storing the extracted real-time correction information and correction information parameter in a correction-state storage unit; When the real-time correction information extracted including the case where the real-time correction information is not received has elapsed validity time, correction information within the valid time stored in the correction information storage unit or the latest correction information buffer, A fifth step of generating correction information of a current time point using the correction information parameter stored in the storage unit; And a sixth step of extracting GNSS information including coordinates, time, speed, and direction of movement through a GNSS receiver, ; A seventh step of receiving data including real-time correction information and correction information parameters from at least one of a base station using a short-range wireless communication medium including a socket server, an HTTP server, an FTP server and a DSRC, a UTIS and a WAVE, ; Extracting real-time correction information and correction information parameters from the received data signal, and storing the extracted real-time correction information and correction information parameter in a correction information storage unit; The real-time correction information including the case where the real-time correction information is not received, the correction information within the valid time stored in the correction information storage unit or the latest correction information buffer, A ninth step of generating correction information of the current time point using the correction information parameter stored in the storage unit; And stores the real-time correction information extracted from the data signal or the real-time correction information generated using the previously stored correction information or the correction information parameter in the correction information buffer and correction information storage unit And a tenth step of:

According to another aspect of the present invention, there is provided a method of processing correction information of a satellite navigation correction system, the method comprising the steps of: A second step of generating correction information of the current time using the correction information and the correction information parameter stored in the correction information storage unit if it is not the broadcast signal receiving area; A third step of encoding the correction information generated in the second step in an RTCM format; A fourth step of inputting the coded correction information to the GNSS receiver and storing the coded correction information in the latest correction information buffer and the correction information storage unit; A fifth step of receiving broadcast signals when the broadcast signal receiving area is the first step and retrieving correction information stored in a latest correction information buffer when real-time correction information does not exist; A sixth step of determining whether the correction information retrieved from the latest correction information buffer or the real-time correction information included in the received broadcast signal is within valid time; A seventh step of sequentially performing the second to fourth steps when the correction information is not within the valid time; If the correction information retrieved from the buffer or the real time correction information received from the broadcasting signal is information within the valid time and the correction information is not in the RTCM format, And an eighth step of selectively executing the fourth step if the correction information is in the RTCM format.

The present invention is advantageous in that, in a terminal that can not receive real-time correction information, the positioning correction information can be generated by itself using the correction information parameter and can be subjected to the positioning correction.

Further, the present invention has an effect that it is possible to output more accurate positioning information than a conventional positioning method using only a GNSS signal by generating positioning correction information by itself using the correction information parameter and performing positioning correction.

In addition, the present invention generates real-time correction information as well as cumulative information of past measurement values and generates correction information by itself using the received correction information parameter and uses the generated correction information for positioning correction, thereby real- It is possible to stably perform the positional correction even if the mobile station is not received.

Further, the present invention has an effect of reducing the data transmission amount by transmitting only the correction information parameter generated through the measurement information of the past time point, instead of directly transmitting the measurement information of the past time point.

FIG. 1 is a diagram illustrating an overall operation of a correction information processing apparatus of a satellite navigation correction system according to an embodiment of the present invention,
2 is a block diagram illustrating a configuration of a MOT system encoding system using a TPEG format according to an embodiment of the present invention,
FIG. 3 is a block diagram illustrating a configuration of a MOT system encoding system that does not use a PEG format according to an embodiment of the present invention,
4 is a block diagram of a TDC coding system using a TPEG format according to an embodiment of the present invention.
FIG. 5 is a block diagram illustrating a configuration of a TDC scheme encoding system that does not use a TPEG format according to an embodiment of the present invention,
6 is a configuration diagram of a coding system for a smartphone or a tablet PC according to an embodiment of the present invention and a system using a server and terminal communication,
7 is a block diagram showing a configuration of a beacon transmission / reception system according to an embodiment of the present invention,
8 is a block diagram showing a configuration of a correction information processing apparatus according to an embodiment of the present invention,
FIG. 9 is a block diagram showing a configuration of a socket communication, HTTP, FTP, short range wireless communication, or beacon processing apparatus according to an embodiment of the present invention,
10 is a flowchart of the operation of the correction information processing apparatus according to an embodiment of the present invention.

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

1 is an exemplary view for explaining the overall operation of the correction information processing apparatus of the satellite navigation correction system according to an embodiment of the present invention.

The ground reference station 100 receives signals from a plurality of GNSS satellites 600 and generates real-time correction information. The generated real-time correction information is transmitted to the correction information parameter generating unit 200 at the same time as being provided in real time on the broadcasting / communication medium.

The correction information parameter generator 200 accumulates the received real-time correction information, generates data including the correction information parameter, and transmits the data to the broadcasting center 300 of the broadcasting station. Here, information can be transmitted and received between the ground reference station 100, the correction information parameter generating unit 200, and the broadcasting center 300 using a wired / wireless communication line and various broadcasting / communication means.

The broadcast center 300 transmits the data including the correction information parameter to the transmitting station 400 through the data broadcasting channel, and the transmitting station 400 transmits the data broadcasting signal including the correction information parameter to a plurality of terminals (500).

If the validity period of the recently received correction information has elapsed in the state in which the real-time correction information is not received and the real-time correction information is not received or the real-time correction information is received, the terminal 500 can no longer use The correction information that can be applied to the current time is generated by using the correction information parameter received at the past time point, and then the pseudo distance is corrected using the generated correction information.

For example, if it is assumed that the correction information parameter has a validity time of one day (24 hours), the terminal 500 may not receive the correction information parameter and the real-time correction information for a maximum of 24 hours It is possible to correct the pseudo range after generating the correction information of the current time using the correction information parameter received at the past time point.

In general, when data is transmitted using a data broadcast or a wireless communication network, since the frequency resources are limited, it is necessary to minimize the amount of data to be transmitted. Therefore, in the case of providing accumulated correction information as it is in the past, it is difficult to provide the correction information through broadcasting because the amount of transmission data is large. Therefore, in the present invention, only the correction information parameter capable of generating the correction information is provided, and the terminal can receive it and generate the correction information at a specific time point.

Hereinafter, the correction information parameter generating method will be described.

Since the motion of the GNSS satellite 600 is affected by various perturbation forces affecting the change of the satellite orbits but the effect is very small, it can be assumed that the GNSS satellites orbit the earth with a constant period and a constant orbit . Therefore, in a general case where there is no specificity such as a solar explosion, a geomagnetic storm, signal interference, etc., the correction information (or pseudorange correction information) of each satellite observed at a specific point also has a similar value according to the period.

Accordingly, the present invention is based on the fact that correction information (or pseudo range correction information) for a short period of time similarly appears as described above, and the correction information for three days from D-1, D-2, And provides the polynomial coefficients of the polynomial equation to the terminal 500. The polynomial equation of the polynomial equation is obtained by the polynomial equation. At this time, when calculating the average value of the correction information for 3 days, time shifting is performed considering the period of each GNSS system. For example, GPS estimates about 3.6 minutes for D-1 day correction, about 7.2 minutes for D-2 day correction, and about 3.6 minutes for D-1 day, The correction information is time-shifted by about 10.8 minutes so that the average value based on the D-hour time can be calculated. Here, the correction information for the total of three days is merely an example according to the embodiment of the present invention, and it is natural that the correction information may be more or less according to the case.

Accordingly, if the validity period of the latest correction information has elapsed in the state in which the real-time correction information is not received and the terminal 500 can no longer use the real-time correction information, , The correction information polynomial is generated using the polynomial coefficients and the pseudo distance correction information of the current time can be calculated by the terminal itself.

As an example of a specific method of modeling the average of the correction information by a polynomial, the NDGPS accuracy of the Ministry of Land, Transport and Maritime Affairs proposed by the same applicant of the present invention in the Korean Geospatial Information Science Vol. 19, No. 2 (pp. 63-73, ≪ / RTI > discloses an anomaly point and noise removal technique of a pseudo range correction value for improving the performance of a system. In the technique described above, a technique of modeling the pseudo range correction information on the D-1 th day as a polynomial expression to detect and correct an abnormal point, a noise, and an anomaly of the D pseudo distance correction information is described.

Therefore, in the present invention, based on the experience of the above-described technology development, the technology has been developed to be more advanced than the conventional technology by further utilizing the data and the time shifting technique for three days from D-3 to D-1 The technology can be applied to a terminal in the shadow area of the position correction information service.

As described above, the present invention models a mean value (or a mean value of pseudo range correction information) of GNSS angle-specific correction information observed for three days from D-1 to D-3 with a polynomial curve junction. The polynomial coefficients determined as a result of the modeling are used as correction information parameters for generating the correction information of D.

On the other hand, depending on the satellite, it may be observed in any one of 24 hours, or observed in two or three time zones. Thus, from one set to three sets of correction information parameters can be generated for one satellite for 24 hours. Therefore, when transmitting the correction information parameter, the correction information parameter generation unit 200 transmits a correction information parameter set including a time zone in which the terminal should generate correction information using the correction information parameter.

Hereinafter, a specific method of modeling the average of the correction information with a polynomial curve junction will be described.

First, the mean value and the time information of the correction information observed every three days are expressed by a linear function, and the least squares method which minimizes the sum of squares of residuals, which is the difference between the calculated correction information and the observed correction information, is used Determine the coefficients of the polynomial. In this case, since the tendency of the correction information changes according to the observation time zone and the GNSS satellite, K candidate orders are set, and candidate polynomials corresponding to the respective orders are generated first, and a comparison of RMS (Root Mean Square) And determines the polynomial closest to the change tendency of the pseudorange correction information of each satellite and each observation time zone. At this time, it is more likely that the more degrees of the candidates are compared, the more accurate the result. However, as the degree of order increases, the accuracy is not improved. As the number K of candidate orders increases, the processing speed becomes slower. Therefore, the determination of the number of candidate orders is performed by the operator in accordance with the system performance of the correction information parameter generation unit 200 It is desirable to be able to select.

The curve connection modeling method described above is an example of one of various methods of modeling polynomials to obtain polynomial coefficients transmitted from the correction information parameter generator of the present invention to a terminal and does not limit the method of modeling polynomials . In other words, the present invention is characterized in that time shifting is applied to the correction information observed for three days, and the average value and the time information for each second are modeled in a polynomial, and then only the coefficients of the polynomial are transmitted.

The GNSS correction information parameter is composed of M sets of N satellites. Where N is the number of observable GNSS satellites and M is the number of reference points that are the basis for generating the correction information parameter. The reference point may coincide with the ground reference station 100 that is actually operated for generating real-time correction information, and may be set to an arbitrary reference point by the correction information parameter generating unit 200. Also, the number of reference points transmitted through the broadcasting / communication medium must be at least one, and the value of M can be determined in consideration of the data transmission amount.

The correction information parameter provided by the correction information parameter generation unit 200 includes information (1) to (3) as follows.

(1) satellite number,

(2) Separator and coordinates of the reference point of correction information,

(3) polynomial coefficients a ₁ to a _n ,

The entire N × M set is transmitted with the information thus configured as one set.

의 다항식을 생성할 수 있다. Accordingly, the terminal 500 receives the correction information parameter as described above, and calculates the distance between the current position coordinate of the terminal output from the GPS receiver of the terminal 500 and the coordinates of the correction information parameter reference point M included in the correction information parameter The difference is calculated by the geometric distance calculation method and the correction information parameter reference point of the nearest point is selected. Then, using the polynomial coefficient of the selected point,

≪ / RTI >

In this case, the input value of the polynomial equation is the time at which the correction information is to be generated, and the output value is correction information at that time. For example, since the correction information parameter generated using the correction information for three days from D-3 to D-1 is information that can be continuously used in the D-date, a data broadcast signal including correction information parameters is transmitted at regular intervals In the terminal, the current time is input to the value of the polynomial in the shaded area of the real-time position correction information service, so that the correction information of the current time can be produced by itself and used for position correction.

Meanwhile, the correction information (PRC) used in the correction information parameter generator 200 of the present invention is stored in the satellite information storage unit 110 for generation of the correction information parameter, and is provided to the second terminal 500 in real time Information. Therefore, the terminal 500 can receive the correction information by directly calculating the average value of the correction information in the corresponding time zone using the accumulated correction information when the terminal receives the real-time correction information and accumulates for three days and then enters the reception- .

In such a case, the time shifting method applied in the correction information parameter generator 200 may be applied equally. In order to directly calculate the average value from the accumulated information in the terminal 500, the following conditions (1) to (3) must be satisfied.

(1) Since the storage space of the terminal is sufficient, the correction information of every reference point can be stored,

(2) the terminal must continuously operate in the past and store the correction information every second of all reference points, (3) the terminal has sufficient computing power, accumulates every second correction information of the reference points in the storage unit, If the information is not received, it should be possible to calculate the average value of the accumulated correction information to perform the position correction.

Therefore, if the terminal 500 can not temporarily use the real-time correction information, the correction information can be generated using one of the following two methods according to the capacity and the computing power of the storage device of the terminal, If the device capacity and computational power are sufficient, you can use both of the following methods to generate calibration information.

Method 1: A method of generating correction information using only the correction information parameter provided by the correction information parameter generating section 200,

Method 2: There is a method of directly calculating the average value of correction information after accumulating real-time correction information in the terminal.

Hereinafter, the broadcast signal coding will be described in detail with reference to FIG. 2 to FIG.

First, the case of DMB data broadcasting among broadcasting media that can be used for transmission to data broadcasting will be described.

The DMB data broadcasting includes detailed transmission schemes such as Transparent Data Channel (TDC), Multimedia Object Transport (MOT), Fast Information Data Channel (FIDC), and IP tunneling. In transmitting the correction information parameter information of the present invention, Considering the ease of development, IP tunneling is not appropriate and it is preferable to use TDC, MOT or FIDC.

However, the correction information parameter of the present invention is not limited to the transmission method but may be a DMB data service such as PAD (Program Associated Data), NPAD (Non-PAD), TDC, MOT, Broadcasting Web Site (DLS) ), Still image, FIDC, IP tunneling, and combinations thereof.

First, the MOT method is a method capable of transmitting data in units of files, and is a method suitable for transmitting the correction information parameter information of the present invention. This is because the correction information parameter information is information that is distinguished according to a plurality of GNSS satellites and a plurality of reference points. Therefore, if information is generated by dividing an MOT content name, the terminal distinguishes information according to satellites and reference points . Further, since the correction information parameter information is not information requiring real-time property, it is not necessary to use a stream-based data transmission method. In addition, since information corresponding to each satellite is information independent of each other, it is not necessary to use the MOT directory method. Therefore, it is preferable to use the MOT header mode to reduce the amount of information transmitted.

When the MOT method is used, the criteria for grouping the information into files can be determined in various forms according to the needs of the service operator, such as the number of the satellite and / or the reference point, and the basic structure of the individual files is either TPEG format or the like If not, they will have different structures as follows.

First, the case of using the TPEG format will be described with reference to FIG.

The MOT file name is determined, for example, as SID_A.SID_B.SID_C_SCID_NNN.bin. The data constituting each MOT file is composed of the number m of messages (satellites), m (number of messages) * messages. Here, the message may include a reference point, a satellite number, a polynomial coefficient, an effective time, and a combination thereof.

Of the data constituting the correction information parameter, the coordinates of the reference point may be transmitted by broadcasting or may be distributed to the terminal at the time of terminal release or at the terminal update time without transmitting the broadcast to reduce the amount of data transmission.

When using the TPEG format, it includes data defined in the basic format of TPEG other than the attributes of the messages listed above. For example, if sni_component (0A) of TPEG part 3 (SNI) is used or long_string data (0A) of TPEG part 3 When using the format, it is possible to reduce the amount of information transmitted since the number of messages (satellites) m, m (number of messages) * is composed only of messages and there is no need to include additional data.

2 is a block diagram illustrating a configuration of a MOT system coding system using a TPEG format according to an embodiment of the present invention. The MOT system includes a terrestrial reference station 100, a satellite information storage unit 110, a correction information parameter generator 200 A TPEG format encoding unit 210, an MOT encoding unit 220, a data broadcast MUX 230, and a DMB MUX 240.

The correction information parameter generator 200 receives the real-time correction information from the plurality of ground reference stations 100, accumulates the real-time correction information, generates correction information parameters of the respective reference points, and then generates reference points, satellite numbers, polynomial coefficients, And a combination thereof. The TPEG format encoding unit 210 encodes the correction information parameters of the individual satellites generated by the correction information parameter generation unit 200 in the TPEG format.

The MOT encoding unit 220 performs file creation, MOT header configuration, and file compression on data encoded in the TPEG format. The data broadcasting MUX 230 generates a data group and packetizes the MOT-coded data, and the DMB MUX 240 encodes the packet into a DMB broadcasting signal.

In case of the TPEG format, since the terminal decoding technology is widely used, it is advantageous that terminal development is easy by using the TPEG format. However, since the data defined in the TPEG format together with the correction information parameter must be transmitted together, There is a problem that the amount becomes large. Therefore, in order to minimize the amount of data to be transmitted, the file can be configured as follows without using the TPEG format.

Next, the case where the TPEG format is not used will be described as follows.

The MOT file name can be any file name specified by the user including the satellite number and the reference point separator, and the data constituting the file is composed of the satellite number, the polynomial coefficient, and the effective time.

Of the data constituting the correction information parameter, the coordinates of the reference point may be transmitted by broadcasting or may be distributed to the terminal at the time of terminal release or at the terminal update time without transmitting the broadcast to reduce the amount of data transmission.

When the TPEG format is not used, as shown in FIG. 3, the TPEG encoding unit 210 is excluded in FIG.

Next, the TDC method is a method of transmitting data in a stream form. When the correction information parameter of the present invention is to be included in a service channel using the TDC method, the application target terminal performs a decryption function It can be used when the TDC method must be used as in the case where it is not mounted, and it is coded in the following structure.

When using the TPEG format, the calibration information parameter component frame consists of the number of messages (mos) m, m (number of messages) * messages, where the message is a reference point, a satellite number and a polynomial coefficient, Or the like.

When using the TPEG format, it includes the data defined in the TPEG basic format other than the attributes of the messages listed above. For example, if sni_component (0A) of TPEG part 3 (SNI) is used or long_string data (0A) of TPEG part 3 The number of messages (m), m (number of messages) * messages, where the message is composed of only messages containing at least one of a satellite number, a polynomial coefficient, an effective time, and a combination thereof , It is not necessary to include additional data, thereby reducing the amount of information transmitted.

The coordinates of the reference point among the data constituting the correction information parameter may be transmitted in a separate TPEG component frame or may be installed in the terminal at the time of terminal release or at the terminal update time without transmitting the broadcast to reduce the amount of data transmission.

FIG. 4 is a block diagram of a TDC scheme coding system using a TPEG format according to an embodiment of the present invention. The TPEG format coding unit 210, the TDC coding unit 250, the data broadcasting MUX 230, And a DMB MUX 240.

2, except that the TDC encoding unit 250 generates a TDC stream for the correction information parameter of the individual satellite encoded by the TPEG format encoding unit. The data broadcasting MUX performs data group generation and packet timing on the generated TDC stream, and the DMB MUX encodes the packet into a DMB broadcasting signal.

If the TPEG format is used when the TDC method is used, there is a problem that the total amount of transmitted data becomes large due to the repetition of the data defined in the TPEG format as in the MOT method. Therefore, in order to minimize the amount of transmitted data, You can construct a stream like this.

Since the TDC scheme is a stream data transmission, a sync byte is required.

The data constituting the stream includes the length of the stream, the number m of messages (satellites) included in the stream, m (number of messages) * polynomial coefficient, effective time data, and CRC. The coordinates of the reference point among the data constituting the correction information parameter may be transmitted in a separate TDC stream or may be distributed to the terminal at the time of terminal release or at the terminal update time without transmitting the broadcast in order to reduce the amount of data transmission.

FIG. 5 is a block diagram illustrating a configuration of a TDC encoding system that does not use the TPEG format according to an embodiment of the present invention. In FIG. 4, the TDC encoding unit 250 excluding the TPEG format encoding unit 210, A broadcast MUX 230 and a DMB MUX 240. However, the TDC encoding unit 250 generates a TDC stream with respect to the correction information parameters of the individual satellites generated by the correction information parameter generating unit 200. The data broadcasting MUX 230 performs data group generation and packet timing on the generated TDC stream, and the DMB MUX 240 encodes the packet into a DMB broadcasting signal.

When using the MOT and TDC methods, the service operator can decide whether or not to use the TPEG format. In addition, data broadcasting formats other than MOT format and TDC format may be applied according to the service requirement.

2, 3, and 4 to 5, when the DAB, DAB +, and AT-DMB systems are utilized as the data broadcasting medium for transmitting the information of the present invention, The same techniques apply as applied. The data broadcasting signal generated in the data broadcasting MUX is input to the MUX of the corresponding broadcasting system and is transmitted as a corresponding broadcasting signal.

In order to transmit the information of the present invention using the FM addition broadcast, up to the step of the TDC scheme of the DMB, the TPEG format coding unit 210 in FIG. 4, or the correction information parameter generation unit 200 in FIG. 5, The same technique as that applied to the data broadcasting is used, and the FM substation uses the general structure of the broadcasting system at a later stage. However, if the correction information parameter is transmitted using the FM addition broadcast without being limited to the stream format, the FM information may be transmitted from the TPEG format encoding unit 210 shown in FIG. 4 or the correction information parameter generating unit 200 shown in FIG. The structure of the additional broadcasting system can be used as it is.

In the case of transmitting information according to the present invention using the ATSC-M / H data broadcast, information is transmitted to the TPEG format encoding unit 210 in FIG. 2 of the DMB MOT system or the correction information parameter The same technique as applied to the MOT scheme of the DMB data broadcasting is used until the generation unit 200, and a general structure for the file format data transmission of the ATSC-M / H broadcasting system is used at a later stage.

In case of transmitting information in the stream format when transmitting the information of the present invention using the ATSC-M / H data broadcast, the TPEG format coding unit 210 in FIG. 4 of the DMB TDC scheme or the correction information parameter generating unit 210 in FIG. The same technique as applied to the DMB data broadcasting is used until the step (200), and a general structure for transmitting the stream format data of the ATSC-M / H broadcasting system is used at a later stage.

In order to transmit the correction information parameter of the present invention, a data format supported by the ATSC-M / H broadcasting system, regardless of whether the ATSC-M / H broadcasting system transmits file format data or stream format data, It is acceptable to apply any of them.

Meanwhile, the technology of the present invention can be applied to digital radio broadcasting media including DRM, DRM +, and HD-Radio. When the information of the present invention is transmitted using the digital radio broadcasting in the file format, the TPEG format coding unit 210 in FIG. 2 of the DMB MOT system or the correction information parameter generating unit 200 in FIG. 3 The same technology as applied to the MOT system of the DMB data broadcasting is used and the general structure for the file format data transmission of the corresponding digital radio broadcasting system is used at a later stage.

In the case of transmitting information in a stream format when transmitting the information of the present invention using digital radio broadcasting, the TPEG format coding unit 210 in FIG. 4 of the DMB TDC scheme or the correction information parameter generation unit 200 in FIG. The same technology as applied to the DMB data broadcasting is used up to the step, and the general structure for the stream format data transmission of the corresponding digital radio broadcasting system is used at a later stage.

In order to transmit the correction information parameter of the present invention, any type of data format supported by the digital radio broadcasting system, regardless of whether file format data transmission or stream format data transmission of the digital radio broadcasting system is applied It is acceptable.

Meanwhile, in order to provide the correction information parameter of the present invention in a smart phone and a tablet PC which have been widely popular among mobile terminals (or portable terminals) equipped with a GPS receiver (or a GNSS receiver) A smartphone and a tablet PC may be connected to the server to receive the information of the present invention. Here, the terminal may be implemented in various forms such as a navigation terminal for a car, a terminal for a ship, a bicycle or a pedestrian terminal.

FIG. 6 is a block diagram of a system for using smartphone or tablet PC encoding system and server and terminal-based communication according to an embodiment of the present invention, which includes a correction information parameter HTTP server 310, a correction information parameter FTP server 320 Or a calibration information parameter socket server 330 and a smartphone and tablet PC 510. [

The configuration for generating information transmitted from the servers 310, 320, and 30 to the smartphone and the tablet PC 510 is similar to that of the system configuration described with reference to FIGS. 1 to 5, ), And there is a difference in that there is no need to perform a coding process for transmission to the data broadcasting in the subsequent step. Instead, an HTTP server 310, an FTP server 320, or a socket communication server 330 for providing correction information parameters may be provided to provide information to the terminal 510 such as a smartphone and a tablet PC. The method for connecting to the servers 310, 320, and 330 for providing the correction information parameters and receiving data is generally known as a method using an HTTP protocol or an FTP protocol and a method using a client / server method using a socket communication Can be used.

The correction information parameter HTTP server 310 is a server for providing a correction information parameter through the HTTP protocol. The correction information parameter FTP server 320 is a server for providing a correction parameter of a file format through the FTP protocol. The correction information parameter socket server 330 is a server that provides calibration information parameters via socket communication. The servers 310 to 330 convert and provide the correction information parameter to the HTTP protocol, the FTP protocol, and the socket communication, respectively, for the record data of the individual satellites encoded by the correction information parameter generation unit 200. The terminal 510 such as the smart phone and the tablet PC may access the servers 310 to 330 and receive the correction information parameter suggested by the present invention.

7 is a block diagram illustrating a configuration of a beacon transmission / reception system according to an embodiment of the present invention. In the current beacon system real time DGNSS information transmission / reception system, the correction information parameter generation unit 200 and the satellite information A storage unit 110 is added to transmit and receive correction information parameters proposed in the present invention.

The beacon transmission unit 340 provides correction information parameters through beacon communication. That is, the correction information parameter generating unit 200 converts and provides the correction information parameter to the beacon communication with respect to the record data of the individual satellites encoded by the correction information parameter generating unit 200. Accordingly, the beacon receiving terminal 520 can receive the correction information parameter transmitted in the beacon manner.

Further, the correction information processing apparatus according to the present invention includes a correction information provision center (not shown) including a satellite signal observation reference station (e.g., a ground reference station) 100 and a correction information parameter generation unit 200, (Not shown) and a data broadcasting transmission unit (not shown) for coding the data generated by the parameter generation unit 200 in a predetermined data broadcasting format including a file format or a stream format, (Not shown) and a data broadcasting transmission unit (not shown) for encoding the signal generated by the TPEG format coding unit 210 into a predetermined data broadcasting format including a file format or a stream format .

The data broadcasting may be at least one of DAB, DAB +, DMB, AT-DMB, ATSC-M / H, digital radio broadcasting (including DRM, DRM +, and HD- In order to transmit a plurality of satellite data generated by the correction information parameter generation unit 200, a correction information parameter HTTP server (not shown) for providing a correction information parameter in the HTTP protocol, a correction information parameter in the FTP protocol (Not shown), a correction information parameter socket server (not shown) for providing correction information parameters in socket communication, a base station (not shown) providing correction information parameters in short range wireless communication including DSRC, UTIS and WAVE And a base station (not shown) that provides correction information parameters in a beacon manner.

FIG. 8 is a block diagram showing a configuration of a correction information processing apparatus according to an embodiment of the present invention, which includes a GPS receiving unit 531; A broadcast receiving unit 532; A data broadcast decoding unit 533; A real-time correction information extracting unit 534; A correction information parameter extracting unit 535; A correction information storage unit (536) for storing correction information parameters and real-time correction information corresponding to each of the plurality of satellites; Correction information optimizing unit 537; A latest correction information buffer 538; And an NMEA decoding unit (not shown). The National Marine Electronics Association (NMEA) is a standard for transmitting information such as time, position, and bearing. The information is mainly used for gyro compass, GPS, compass, and inertial navigation system (INS).

The GPS receiver 531 extracts GPS information including coordinates, a time, a speed, and a moving direction from a signal received from each GPS satellite, and transmits the extracted GPS information to the correction information optimizer 537. The GPS receiving unit 531 calculates a pseudo distance from a signal received from each GPS satellite and also calculates the coordinates corrected using the correction information input from the correction information optimizing unit 537 and the time, Direction and the like in the form of NMEA data or binary data.

Since the signal received from the GPS satellite is the same as or included in the signal received from the GNSS satellite, the GPS receiver (unit) is the same as the GNSS receiver in the entire description including the embodiment of the present invention and claims It may be used as a concept included in this. Accordingly, the GNSS receiver (unit) is the same as the GPS receiver unit or includes the GPS receiver unit, and the step of receiving the GNSS information through the GNSS receiver unit is also performed by the GPS receiver unit Quot; is < / RTI > received or included.

The broadcast receiver 532 receives a broadcast signal and transmits the broadcast signal to the data broadcast decoder 533. [ The data broadcasting decoding unit 533 extracts and decodes the data broadcasting signal from the broadcasting signal received by the broadcasting receiving unit 532 and outputs the decoded data to the real-time correction information extracting unit 534 and the correction information parameter extracting unit 535 ). The real-time correction information extracting unit 534 extracts real-time correction information from the data broadcasting signal input from the data broadcasting decoding unit 533 and inputs the extracted real-time correction information to the correction information optimizing unit 537.

The correction information storage unit 536 stores the real-time correction information extracted by the real-time correction information extraction unit 534 and the correction information parameters extracted from the correction information parameter extraction unit 535. The real-time correction information and correction information parameter stored in the correction information storage unit 536 can be used when the terminal does not receive the real-time correction information.

In order to select optimal correction information, the correction information optimizing unit 537 first encodes the data input by the real-time correction information extracting unit 534 in the RTCM (Radio Technical Commission for Maritime Services) format. If the real-time correction information input by the real-time correction information extracting unit 534 is data encoded in the RTCM format, the RTCM encoding process is omitted.

In addition, the correction information optimizing unit 537 retrieves the information stored in the latest correction information buffer 538 to determine whether the validity time has elapsed, if the real-time correction information is data whose validity time has elapsed. If the information stored in the latest correction information buffer 538 is information whose elapsed time has elapsed, a polynomial coefficient of a reference point closest to the current position of the terminal among the correction information parameters stored in the correction information storage unit 536 is retrieved Generates the correction information of the viewpoint, encodes it in RTCM format, and inputs it to the GPS receiver 531.

In this case, the distance between each reference point and the current position of the terminal can be easily calculated by the geometric distance calculation method. The GPS receiver module 531 may support a pseudo distance value output function. When the GPS receiver module 53 is used, RTCM format data may not be input to the GPS receiver 531 The correction information optimizing unit 537 may directly correct the pseudorange and calculate GPS output data such as coordinates, time, velocity, and moving direction. In addition, the GNSS receiving module (not shown) used in the GNSS receiving unit (not shown) may support the pseudo range value output function. When the GNSS receiving module is used, the RTCM format data is transmitted to a GNSS receiving unit The pseudo distance can be directly corrected by the correction information optimizing unit 537 without input and the GNSS output data such as coordinates, time (time), speed, moving direction, and the like can be calculated.

As described above, the correction information optimizing unit 537 optimizes the correction information using the GPS information and the real-time correction information received from the GPS receiver 531 to detect the position of the terminal. At this time, the optimized correction information is stored in the latest correction information buffer 538, and when the terminal does not receive real-time correction information, the correction information stored in the latest correction information buffer 538 can be used. The correction information optimizing unit 537 may be configured to optimize the information stored in the correction information storage unit 536 (e.g., real-time correction information, correction information parameter) and the GPS information The position of the terminal is detected by optimizing the correction information.

Specifically, when the real-time correction information extracted including the case where the terminal does not receive the real-time correction information is data whose effective time has elapsed, a predetermined period (for example, three days) previously stored in the correction- The values corresponding to the current time point can be averaged and utilized as the correction information of the current time point. For example, if there is no correction information for the current time of D, the correction information for the current time of D can be generated by averaging the current-time correction information of the previous D-1, D-2, and D- D (current) is D-1 (yesterday) when D (current) is +1 (tomorrow), so that there is a problem that correction information does not exist at the present time when D + 1 (tomorrow) is D (today). This problem can be solved by using any one of D-1, D-2, D-3, and combinations thereof as the current-time correction information of D, stored in the correction information storage unit . In addition, when the correction information is temporarily not valid, the correction information within the valid time stored in the latest correction information buffer can be used to advantageously generate the correction information at the current time. Therefore, if the extracted real-time correction information is data whose elapsed time has elapsed, the correction information optimizing unit may calculate an average of the values corresponding to the current point in the correction information for a predetermined period previously stored in the correction information storage unit, The correction information within the stored valid time, the correction information parameter stored in the correction information storage, and combinations thereof to generate correction information of the current time point. It is preferable that an average of values corresponding to a current time point among correction information for a predetermined period already stored in the correction information storage unit, correction information within an effective time stored in a latest correction information buffer, correction information parameters stored in the correction information storage unit, The criterion for selecting at least one of these combinations may be preferentially used if there is correction information within the valid time stored in the latest correction information buffer, and the use of the average and parameters, or a combination thereof, The reliability of the environment and the previously stored correction information (for example, it is effective to use the correction information parameter when a value corresponding to the present point in time is missing from the correction information for a predetermined period).

9 is a block diagram showing a configuration of a receiving terminal by socket communication, HTTP data communication, FTP, short distance wireless communication, or beacon method according to an embodiment of the present invention. In the configuration of FIG. 8, An FTP data receiving unit 543, a short range wireless communication unit 544 or a beacon receiving unit 555 in place of the broadcast decryption unit 533. The socket communication unit 541, the HTTP data communication unit 542, the FTP data receiving unit 543,

The socket communication unit 541 receives the data signal including the real-time correction information and the correction information parameter through the socket communication unit 541 and outputs the data signal to the real-time correction information extraction unit 534 and the correction information parameter extraction unit 535, (Not shown) through the HTTP data communication unit 542 to receive the data signal including the real-time correction information and the correction information parameter, and outputs the real-time correction information extraction unit 534 and the correction information parameter extraction And outputs it to the unit 535.

Similarly, in the case of FTP data reception, the FTP data receiving unit 543 is connected to an FTP data server (not shown) to receive the data signal including the real-time correction information and the correction information parameter, (Not shown) connected to the local area wireless communication network through the local area wireless communication unit 544 in the case of local area wireless communication and outputs the correction information to the correction information parameter extracting unit 535 And outputs the data signal to the real-time correction information extracting unit 534 and the correction information parameter extracting unit 535. In case of receiving the beacon, the beacon receiving unit 555 receives the beacon signal, And outputs it to the extraction unit 534 and the correction information parameter extraction unit 535. The processing of the remaining data is as described in FIG.

On the other hand, information (e.g., real-time correction information, correction information parameter) of the present invention is transmitted to a server (not shown) for a smartphone and a tablet PC using socket communication, HTTP protocol, FTP protocol, It is not necessary to implement a broadcasting receiver and a data broadcasting decoder unlike a terminal that receives information through data broadcasting as shown in FIG. The data received from the server is input to the real-time correction information extracting unit 534 and the correction information parameter extracting unit 535, and the subsequent processing steps are as described in FIG.

FIG. 10 is a flow chart of the operation of the correction information processing apparatus according to the preferred embodiment of the present invention. As shown in FIG. 10, the mobile terminal determines whether it is a broadcast signal receiving area (S110).

If the mobile terminal is located in the broadcast signal receiving area (Yes in S110), it is determined whether the broadcast signal includes the correction information parameter (S120). If the broadcast information includes the correction information parameter (Yes in S120), the correction information parameter is extracted and stored in the correction information storage unit 536 (S130).

However, if it is determined in step S120 that the correction information parameter is not included in the broadcast signal (No in S120), it is determined whether the broadcast signal includes real-time correction information in step S140. If the broadcast signal does not contain real-time correction information (No in S140), the data (latest correction information) is retrieved from the latest correction information buffer (S150).

However, if it is determined in step S140 that the broadcast signal includes real-time correction information (Yes in step S140), it is determined whether the real-time correction information is within valid time (step S160). If the real-time correction information is not information within the valid time (No in S160), correction information for the current time is generated from the correction information storage unit 536 (S170). The generated correction information of the current time is encoded in RTCM format (S190).

If the real-time correction information is within the valid time (Yes in S160), it is determined whether the real-time correction information is encoded in the RTCM format (S180). If the real-time correction information is not coded in the RTCM format (No in S180), the real-time correction information is coded in the RTCM format (S190) The correction information is input to the correction information buffer 531 and the RTCM format data is stored in the correction information buffer 538 and the correction information storage unit 536 (S200).

On the other hand, if it is determined in step S110 that the broadcast signal reception area is not the broadcast signal reception area (No in S110), the process directly proceeds to step S170, and then steps S190 and S200 are performed as described above.

As described above, in the detailed description of the present invention, a method of transmitting and receiving correction information parameters using GPS is described as a specific embodiment of GNSS, but the principles of the present invention can be applied to other GNSSs other than GPS.

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 embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

100: ground reference station 110: satellite information storage unit
200: correction information parameter generation unit 210: TPEG format coding unit
220: MOT encoding unit 230: Data broadcast MUX
240: DMB MUX 250: TDC encoding unit
300: broadcasting center 310: correction information parameter HTTP server
320: correction information parameter FTP server 330: correction information parameter socket server
340: Beacon transmitter 400: Transmitter
500: Mobile Terminal 510: Smartphone & Tablet PC
520: Beacon reception terminal 531: GPS receiver
532: Broadcast receiver 533: Data broadcast decoder
534: Real-time correction information extracting unit 535:
536: correction information storage unit 537: correction information optimization unit
538: recent correction information buffer 600: GNSS satellite

Claims (20)

delete delete delete delete delete delete delete delete delete delete delete delete A GNSS receiver extracting GNSS information including coordinates, time, speed, and moving direction;
A broadcast receiver for receiving a broadcast signal;
A data broadcast decoder extracting and decoding a data broadcast signal from the broadcast signal;
A correction information storage unit for extracting and storing real-time correction information and correction information parameters from the decoded data broadcast signal;
When the extracted real-time correction information, including the case where the real-time correction information is not received, is the data whose valid time has elapsed, among the correction information stored in the correction information storage unit for a predetermined period of time, A correction information optimizer configured to generate correction information at the present time by using at least one of an average, correction information within an effective time stored in a recent correction information buffer, correction information parameters stored in the correction information storage unit, and a combination thereof; Correction information processing apparatus for a satellite navigation correction system, characterized in that comprises a. A GNSS receiver extracting GNSS information including coordinates, time, speed, and moving direction;
A data receiver for receiving data including real-time correction information and correction information parameters from at least one of a base station using a short range wireless communication medium including a socket server, an HTTP server, an FTP server and a DSRC, UTIS, and WAVE, and a base station using a beacon scheme;
A correction information storage unit for extracting and storing real-time correction information and correction information parameters from the received data signal;
When the extracted real-time correction information, including the case where the real-time correction information is not received, is the data whose valid time has elapsed, among the correction information stored in the correction information storage unit for a predetermined period of time, A correction information optimizer configured to generate correction information at the present time by using at least one of an average, correction information within an effective time stored in a recent correction information buffer, correction information parameters stored in the correction information storage unit, and a combination thereof; Correction information processing apparatus for a satellite navigation correction system, characterized in that comprises a. 15. The method of claim 13 or claim 14, wherein the correction information optimization unit the real-time correction information extracted from the data or the real-time correction information generated using the pre-stored correction information or correction information parameters, the latest correction information buffer and correction information Correction information processing apparatus for a satellite navigation correction system, characterized in that configured to be stored in the storage unit. A first step of extracting GNSS information including coordinates, time, speed, and direction of movement through the GNSS receiver;
A second step of receiving a broadcast signal through a broadcast receiver;
Extracting and decoding a data broadcast signal from the broadcast signal;
A fourth step of extracting real-time correction information and correction information parameters from the decoded data broadcasting signal and storing them in the correction information storage unit;
When the extracted real-time correction information, including the case where the real-time correction information is not received, is the data whose valid time has elapsed, among the correction information stored in the correction information storage unit for a predetermined period of time, A fifth step of generating correction information at the current time point using at least one of an average, correction information within an effective time stored in a recent correction information buffer, correction information parameters stored in the correction information storage unit, and a combination thereof; Correction information processing method of a satellite navigation correction system, characterized in that comprises a. Extracting GNSS information including coordinates, time, speed, and moving direction through the GNSS receiving unit;
A seventh step of receiving data including real-time correction information and correction information parameters from at least one of a socket server, an HTTP server, an FTP server, and a base station using a short range wireless communication medium including DSRC, UTIS and WAVE, and a base station using a beacon scheme; ;
An eighth step of extracting real-time correction information and correction information parameters from the received data signal and storing the correction information parameters in a correction information storage unit;
When the extracted real-time correction information, including the case where the real-time correction information is not received, is the data whose valid time has elapsed, among the correction information stored in the correction information storage unit for a predetermined period of time, A ninth step of generating correction information at the present time by using at least one of an average, correction information within an effective time stored in a recent correction information buffer, correction information parameters stored in the correction information storage unit, and a combination thereof; Correction information processing method of a satellite navigation correction system, characterized in that comprises a. The method according to claim 16 or 17, wherein the real-time correction information extracted from the data signal, or the real-time correction information generated using the previously stored correction information or correction information parameters are stored in the latest correction information buffer and correction information storage unit. A tenth step; Correction information processing method of a satellite navigation correction system, characterized in that it further comprises. Determining whether the broadcast signal reception area is a first step;
A second step of generating correction information of the current time by using correction information and correction information parameters stored in the correction information storage unit when the broadcasting signal is not received;
A third step of encoding the correction information generated in the second step in an RTCM format;
A fourth step of inputting the encoded correction information to a GNSS receiver and storing a recent correction information buffer and the correction information storage unit; Correction information processing method of a satellite navigation correction system, characterized in that comprises a. The method according to claim 19, If the broadcast signal reception area in the first step,
A fifth step of receiving correction information stored in a recent correction information buffer when there is no real time correction information by receiving a broadcast signal;
A sixth step of determining whether correction information loaded from the recent correction information buffer or real-time correction information included in the received broadcast signal is information within an effective time;
A seventh step of sequentially executing the second to fourth steps when the correction information is not information within a valid time; Wherein the correction information is generated based on the correction information.

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