KR20010056809A - Apparatus and method for processing transmission data using satellites in time and frequency transmission system - Google Patents

Abstract

PURPOSE: A transmission data processing apparatus in a time and frequency transfer system using a satellite and a method thereof are provided to be continuously used as a performance test tool of a system by transmitting a data in online through a network between a spacecraft control center and a transmission station and smoothly and stably transmitting and receiving the data between a transmission data processor and a modulator. CONSTITUTION: When a system is initialized and a transmission data processor is initiated, ports of a computer allocated to a spacecraft control center and a correction station are opened(401). A transmission process is generated to transmit a data to a modulator(402). The ports are initially in a sleep state and not operated before a data is inputted(403). It is checked whether a data has reached the ports from the spacecraft control center and the correction station(404). When a data reaches the ports, adaptability of the data format is verified(405). If the data format is adaptable, an integer value of a field is extracted according to a reference value set for each field of the data(406) and stored in a database according to a database schema(407). The transmission processor periodically the database for the corresponding data(408), puts it in a previously determined transmission data format, performs a channel coding and a time coding, and transmits it to the modulator(410).

Description

Apparatus and method for transmitting data in time and frequency transmission system using satellites {APPARATUS AND METHOD FOR PROCESSING TRANSMISSION DATA USING SATELLITES IN TIME AND FREQUENCY TRANSMISSION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission data processing apparatus in a time and frequency transmission system using a satellite, and a method and a computer readable recording medium recording a program for realizing the method. Particularly, satellite orbit data and satellite position correction data. The present invention relates to a transmission data processing apparatus for collecting, processing, storing, and converting visual data, and transmitting the same to a satellite, and a computer readable recording medium having recorded thereon a program for realizing the method.

In general, a time and frequency transmission system is a system for distributing time and frequency necessary for synchronization of wired and wireless communication networks to each level of the communication network, which is composed of a transmitting station, a satellite, a receiver, and a compensating station. It transmits orbital data, satellite position correction data and visual data to satellite. Therefore, a transmission data processor for collecting, converting, processing, and transmitting satellite-related data at this transmitting station is very essential.

The transmission data processor should receive and process the satellite's position trajectory data, correction data, and visual data from the satellite control station and the correction station, and the data should be continuously transmitted. In this case, since the satellite control station and the transmitting station are separated from each other, a technology that needs to be transmitted on-line through a network is required to transmit data. In addition, there is a need for a technique to effectively database the transmission data in order to identify the cause of the error and to use it as data for performance evaluation.

In addition, the transmission data generated by the transmission data processing apparatus is transmitted to the modulator, the signal modulated through the modulator is transmitted to the satellite via the antenna.

Finally, a transmission status management technique is required to visually show whether information transmission is progressing normally and to generate an alarm when an abnormality occurs.

SUMMARY OF THE INVENTION The present invention has been made to meet the above requirements, and includes a transmission data processing apparatus and method for collecting, processing, storing and converting satellite orbit data, satellite position correction data and visual data to a satellite and It is an object of the present invention to provide a computer-readable recording medium having recorded thereon a program for realizing the method.

1 is an exemplary configuration diagram of a time and frequency transmission system using a satellite to which the present invention is applied.

2 is a block diagram of a transmission data processing apparatus in a time and frequency transmission system using a satellite according to the present invention;

3 is an explanatory diagram of a transmission database schema according to the present invention;

4 is a flowchart illustrating a transmission data processing method in a time and frequency transmission system using a satellite according to the present invention.

5 is an explanatory diagram of a user interface for managing a transmission state of transmission data according to the present invention;

* Explanation of symbols for the main parts of the drawings

210: transmit data processor 220: satellite control station

230: correction station (I to IV) 240: modulator

In order to achieve the above object, the present invention provides a transmission data processing apparatus in a time and frequency transmission system using a satellite, comprising: source data receiving means for receiving source data from an external satellite control station and a correction station; Source data conversion and processing means for extracting, converting, and processing necessary data from the source data received by the source data receiving means; Storage means for storing the source data converted and processed by the source data conversion and processing means; Processed data transmission means for extracting and transmitting necessary data from said storage means in accordance with a data transmission request; Satellite information transmission management means for setting an initial value and managing a transmission state of satellite information; And time synchronization means for adjusting the internal clock by receiving a clock from the outside.

In addition, the present invention is a transmission data processing method applied to a transmission data processing apparatus of a time and frequency transmission system using a satellite, wherein the transmission process is generated after preparing to receive data transmitted from the satellite control station and the correction station. Making a first step; A second step of verifying suitability of the data received from the satellite control station or correction station; And a third step of extracting necessary data according to a predetermined reference value set in each field of data and storing it in a database according to a predetermined format. A fourth step in which the generated transmission process periodically retrieves corresponding data from a database and converts the data into a transmission data format; And a fifth step of displaying the information transmission state after coding and transmitting the converted data.

The present invention also provides a transmission data processing apparatus of a time and frequency transmission system having a processor, comprising: a function of generating a transmission process after preparing to receive data transmitted from a satellite control station and the correction station; Verifying the suitability of the data received from the satellite control station or correction station; And extracting necessary data according to a predetermined reference value set in each field of data and storing the data in a database according to a predetermined format; A function of the generated transmission process periodically searching for corresponding data in a database and converting the data into a transmission data format; And a computer-readable recording medium having recorded thereon a program for realizing a function of displaying and transmitting information after encoding and transmitting the converted data.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a time and frequency transmission system using a satellite to which the present invention is applied, and includes a satellite 110, a receiving station 120, a transmitting station 130, a correction and integrity monitoring station 140, and a satellite control station. 150).

Here, the transmitting station 130 is composed of a baseband 131 and a transmission data processor 132.

First, the transmission data processor 132 of the transmitting station 110 receives the clock from the cesium atomic clock, adjusts the internal clock, and sends the satellite orbit data sent from the satellite control station 150 and the correction signal and integrity sent from the monitoring and integrity monitoring station 140. Integrity Monitoring data is received on-line, subframes are created in a predefined format, channel coding and time coding is sent, and then transmitted to the modulator.

Here, the satellite 110 receives a signal transmitted from the transmitting station 130 as a simple repeater and broadcasts it to the ground.

Meanwhile, the terrestrial receiving station 120 receives data from the satellite 110 and utilizes it as data for synchronizing the communication network, and the calibration and integrity monitoring station 140 compares the satellite orbit data and the correction data with the actual satellite data. To generate the correction data of the satellite position and send it to the transmission data processor 132 of the transmitting station 130.

2 is a block diagram of an embodiment of a transmission data processing apparatus in a time and frequency transmission system using a satellite according to the present invention.

The transmission data processor 210 includes an original data receiver 211, an original data conversion and processing unit 212, a database 213, a processed data transmission unit 214, a satellite information transmission management unit 215, And a time synchronizer 216 for receiving the precision clock from the cesium atomic clock and setting the internal clock.

The function of the transmission data device of the present invention as described above will be described in detail as follows.

First, the source data receiver 211 receives satellite orbit data and correction data from the satellite control station 220 and the correction stations (I to IV) 230, and the source data conversion and processing unit 212 receives the received data file. Extract the necessary data, convert the extracted data according to the database schema, and then process and store the extracted data in the database 213.

Meanwhile, the database 213 stores data converted and processed from the source data conversion and processing unit 212.

Here, the processed data transmission unit 214 periodically extracts data necessary for transmission from the database 213, converts the data to a transmission data structure, and transmits the data to the modulator 240 by performing channel coding and time coding.

Finally, the satellite information transmission management unit 215 sets an initial value, dynamically shows the state of correction and transmission of the satellite orbit data, and functions as an alarm when an abnormality occurs.

3 is an explanatory diagram of a transmission database schema according to the present invention.

As shown in FIG. 3, the transmission database schema is designed to ensure the reliability of satellite information transmission, to use as a data of performance evaluation, and to use as a data for win identification when an error occurs. The set of satellite orbit entities consists of attributes of time, position, velocity, and acceleration, and sets the time as the primary key.

The correction station I information entity set, the correction station II information entity set, the correction station III information entity set, and the correction station IV information entity set consist of attributes of time, time correction value, and path delay correction value, and set the time as the primary key. In addition, the transmission information relation set consists of the above five entity sets, adds a KST offset and a transmission station ID as attributes, and sets the time as a primary key.

4 is a flowchart illustrating a transmission data processing method in a time and frequency transmission system using a satellite according to the present invention.

In the present invention, data from the satellite control station 220 and the correction station (I to IV) 230 is received by the transmission data processor 210, processed, stored, and transmitted to the modulator 240. Therefore, since data is periodically transmitted from the satellite control station 220 and the correction station (I to IV) 230, processing online is essential.

As shown in FIG. 4, if the transmission data processor 210 is started during system initialization, the ports PORTs of the computer assigned to the satellite control station 220 and the correction station (I to IV) 230 are displayed. Open (401). Next, a transmission process for transmitting data to the modulator 240 is generated (402).

The initial state of the ports is a sleep and does not operate until data enters the port from the outside (403).

Check if the data arrived from the satellite control station 220 and the correction station (I ~ IV) 230 to the ports (403), if the data did not arrive, the ports remain in the initial state (403), the data arrives If yes, the data format is verified (405).

As a result of the verification, if the data format is not appropriate, the ports go to the initial sleep (403). If the data format is appropriate, the integer value of the field is extracted according to the reference value set in each field of the data (406). The data is stored in the database 213 accordingly (407).

The transmission process, which is initially started inside the computer, periodically retrieves the data from the database 213 (408), inserts it into a predetermined transmission data format, performs channel coding and time coding (409), and then transmits it to the modulator 240. In step 408, the process of retrieving the data from the database 213 is repeated.

FIG. 5 is an explanatory diagram of a user interface for managing a transmission state of transmission data according to the present invention, and relates to a user interface for setting an initial value of an environment variable, visually showing a state of transmission of satellite information, and alarming when an abnormality occurs. .

As shown in FIG. 5, the right window visually represents the system, and the left window represents satellite coordinates, velocity vectors, and acceleration vectors, which are the most important information among the transmitted information. At this time, if you press the start button for transmission, a dialog box for setting the initial value of environment variable appears. Enter the necessary values and press the OK button to start the transmission. In the right window, an arrow moves between the systems. Press the stop transmission button to stop the transmission. When transmitting, pressing the Binary Data button creates a window and converts the transmitted data to binary. Pressing the transmit data button disappears the window on the left and displays the full screen of the window on the right. If you press the 'Leap Second' button, the screen for entering the lip second occurrence time appears. If you enter the time, the lip second is processed at the specified time.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention can be used as a continuous performance test tool of a system by transmitting data on-line through a network between a satellite control station and a transmitting station and transmitting and receiving smooth and stable data between a transmitting data processor and a modulator. It has an effect.

In addition, the present invention can be implemented as a core component system of the visual synchronization system, there is an effect that can accumulate the underlying technology in the future operation management system.

Claims (4)

A transmission data processing apparatus in a time and frequency transmission system using a satellite, Source data receiving means for receiving source data from external satellite control stations and correction stations; Source data conversion and processing means for extracting, converting, and processing necessary data from the source data received by the source data receiving means; Storage means for storing the source data converted and processed by the source data conversion and processing means; Processed data transmission means for extracting and transmitting necessary data from said storage means in accordance with a data transmission request; Satellite information transmission management means for setting an initial value and managing a transmission state of satellite information; And Visual synchronization means for adjusting the internal clock by receiving a clock from the outside Transmission data processing apparatus in the time and frequency transmission system comprising a. The method of claim 1, The processing data transmission means, And transmitting the data necessary for transmission from the storage means to a transmission data structure periodically, and performing channel coding and time coding, and then transmitting the data to a modulator. A transmission data processing method applied to a transmission data processing apparatus of a time and frequency transmission system using a satellite, A first step of generating a transmission process after preparing to receive data transmitted from the satellite control station and the correction station; A second step of verifying suitability of the data received from the satellite control station or correction station; And A third step of extracting necessary data according to a predetermined reference value set in each field of data and storing the data in a database according to a predetermined format; A fourth step in which the generated transmission process periodically retrieves corresponding data from a database and converts the data into a transmission data format; And A fifth step of indicating an information transmission state after coding and transmitting the converted data Transmission data processing method in a time and frequency transmission system comprising a. In a transmission data processing apparatus of a time and frequency transmission system having a processor, Generating a transmission process after preparing to receive data transmitted from the satellite control station and the correction station; Verifying the suitability of the data received from the satellite control station or correction station; And Extracting required data according to a predetermined reference value set in each field of data and storing the data in a database according to a predetermined format; A function of the generated transmission process periodically searching for corresponding data in a database and converting the data into a transmission data format; And A function of displaying an information transmission state after coding and transmitting the converted data A computer-readable recording medium having recorded thereon a program for realizing this.