KR100258689B1 - Method for data accessing in satellite communication system - Google Patents

Abstract

PURPOSE: A method for accessing data in a satellite communication system is provided to reduce the throughput of a network management unit and prevent the loss of information by making the data, which are accessed to an auxiliary memory device without going through the processing procedures of the network management unit, accessed directly to the auxiliary memory device without the necessity of being transmitted to the network management unit. CONSTITUTION: If data are received from a base station(ST1), the first processor of a network control part executes a required control procedure, based on the received data(ST2). If the required control procedure is completed, the first processor judges whether the receiving-processed data are the access data(ST3). If it is judged that the receiving-processed data are the access data, the first processor transmits the data to the first database of an auxiliary memory device in a network management unit(ST4). In case that it is judged that the data are not the access data, the first processor transmits the receiving-processed data to the network management unit(ST5).

Description

Data Access Method in Satellite Communication System

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system using satellites, and more particularly to a method of accessing data to an auxiliary storage device of a network management device, wherein the auxiliary storage device does not go through a predetermined process in a network management device among data transmitted from a network controller. In the case of data accessing the data, the present invention relates to a data access method in a satellite communication system that accesses data to an auxiliary storage device immediately after the network controller performs a processing procedure without passing through the network management device.

At present, satellite communication, which enables subscribers who are located at remote sites to make calls through satellites, is becoming increasingly common. Since such satellite communication does not require a separate signal line through a call, it is mainly used for long distance communication between countries, Or it is usefully used as a communication method in a mountainous country like Korea.

In the above-mentioned satellite communication, a pre-assignment multiple access (PAMA) method of allocating communication channels for each subscriber before a predetermined time according to the channel assignment method and a demand assignment multiplex (DAMA) for allocating communication channels according to the subscriber's request. Access) method, which generally adopts DAMA method for data communication and PAMA method for data communication in consideration of the cost and effectiveness of communication channel.

1 is a block diagram showing the overall system configuration of a general satellite communication system.

In FIG. 1, reference numeral 1 denotes a satellite having a plurality of communication channels, and 10 denotes an interface function for data terminals such as a public switched network, a telephone, a computer, and a terminal such as a facsimile, and transmits and receives data through a central station. One base station provides a call function between various terminals.

Also, reference numeral 21 denotes an antenna for transmitting and receiving the satellite 1, an uplink signal, and a downlink signal, and 22 denotes an antenna for separating and inputting and receiving signals transmitted and received through the antenna 21. Orthogonal Mode Trasducer (OMT), Low Noise Amplifier (LNA), Frequency Downconverter (DC) and Frequency Upconverter (UC) to reduce noise and amplify downlink frequency signals (Up Converter) and a high power amplifier (HPA: High Power Amplifier) for amplifying the uplink frequency signal output from the frequency up-converter.

In addition, reference numeral 23 separates and outputs the intermediate frequency applied from the RF processor 22 into a plurality of intermediate frequencies, and also applies the intermediate channel applied from the SCPC (Single Channel Per Carrier) channel unit 24 to be described later. An IF combiner / distributer for combining and outputting frequency signals, and 24 denotes a network control unit to demodulate and decode and output an intermediate frequency signal applied from the IF combiner / distributor 23. SCPC channel unit that encodes, modulates and outputs the message from 30).

Here, the IF combination distribution unit 23 is adopted for system scalability when using a plurality of SCPC channel units 24.

Further, reference numeral 30 performs a polling function for checking the state of each base station 10, and when there is a call request from a specific base station 10, both base stations are assigned by assigning traffic channels and modems to both base stations. Network control unit that performs system control, such as to directly perform mutual communication.

In addition, the network control unit 30 is to process the data transmitted from the base station 10 to be transmitted to the network management device 40 to be described later, the reference numeral 40 is connected to the system operator through the operator terminal It is a network management device that performs overall management of satellite communication systems.

Next, the operation of the satellite communication system having the above configuration will be described.

In a normal state, the network controller 30 periodically performs a polling operation to check the state of each base station to hold state information of each base station 10. When the call request is received from the base station 10, the augmentation control station allocates an available communication channel and modem to provide a system for communication between subscribers.

In addition, the network controller 30 may not only provide data on hardware information of each base station, but also information on data generated while each base station 10 performs communication, for example, transponder channel information, allocation modem information, and billing. The information is generated and transmitted to the network management device 40. The network management device 40 processes the information data received from the network controller 30 and accesses the auxiliary memory device.

On the other hand, the network management device 40 in the information data received from the network control unit 30, such as hardware information of the base station, such as board status information, transponder channel information, information data requiring reliability such as allocation modem information, etc. Will be accessed as an auxiliary storage device without any control procedure.

Therefore, due to the information data that does not require the control procedure in the network management device 40 of the information data transmitted from the network control unit 30, the problem that the load on the network management device 40 is increased do.

In addition, not only the information is lost due to the network management device 40, but there is a problem that takes a long time to access the data.

Accordingly, the present invention has been made in view of the above circumstances, and the data accessed from the network management device to the auxiliary storage device without undergoing a predetermined process is not transferred from the network controller to the network management device. The purpose of the present invention is to provide a data access method in a satellite communication system that can reduce the throughput of the network management apparatus and prevent the loss of information.

1 is an overall system configuration for explaining the outline of a general satellite communication system.

Figure 2 is a block diagram for applying a data access method in a satellite communication system according to the present invention.

3 is an operation flowchart for explaining the operation of the network controller 100 shown in FIG.

*** Explanation of symbols for the main parts of the drawing ***

1: satellite, 10: base station,

21: antenna, 22: RF processing unit,

23: IF combination distribution unit, 24: SCU (SCPC Channel Unit),

30,50: Network control unit, 40,100: Network management device

51: SCC (Service Channel Controller),

52: DP RAM (Dual Port RAM), 53: first processor,

54: first program storage unit, 55: first data storage unit,

101: operator terminal, 102: terminal server,

103: second processor, 104: second program storage,

105: second data storage, 106: auxiliary memory,

106A: first database, 106B: second database.

A data access method in a satellite communication system according to the present invention for achieving the above object is a satellite communication system for providing communication between subscribers by combining a plurality of base stations combined with a plurality of subscribers via satellite, the data received from the base station A data processing step for processing a; and an access data determination step for determining whether the data processed in the data processing step is access data, and if it is determined that the data processed in the data processing step in the access data determination step is access data. The data access step of accessing the data processed in the database of the auxiliary storage device and, if it is determined in the access data determination step that the data processed in the data processing step is not the access data, transmit the processed data to the network management device To Characterized in that configured to include a data transfer phase.

That is, according to the above, it is possible not only to reduce the load on the network management device by the data accessed directly from the network controller to the auxiliary storage device but also through the network management device, and to prevent loss of information generated through the network management device. And the time required for data to be accessed can be shortened.

Next, an embodiment according to the present invention will be described with reference to the accompanying drawings.

2 is a block diagram for applying a data access method in a satellite communication system according to the present invention.

In the figure, reference numeral 50 denotes a network controller for controlling the overall system, which extracts packet information from a message applied from the SCPC channel unit 24 to generate an S-ALOHA packet, and the SCPC channel unit. A service channel controller 51 which generates and outputs a message of a TDM stream with respect to 24, and provides data for transmission and reception between the first processor 53 and the service channel controller 101 which will be described later. The dual port RAM 52 and the first processor 53 for performing the overall control procedure of the network controller 50 is configured.

In addition, the network controller 50 stores the first program storage unit 54 in which the operation program of the first processor 53 is stored, and the first data storage in which various data related to the operation of the network controller 50 are stored. And a data type corresponding to the access data, i.e., an access data information storage section 56 which stores therein the message_ID of the received data string.

On the other hand, reference numeral 100 is a network management device for performing a function such as storing the information data transmitted from the network control unit 50, which is an operator terminal 101 for performing an interface function with the operator and the network management system, The network control unit 100 and the terminal server 102 provided for transmitting and receiving data, and a second processor 103 for performing the operation of the overall network management device 100 is configured.

In addition, the network management apparatus 100 may include a second program storage unit 104 in which an operation program of the second processor 103 is stored, and a second data in which various data related to the operation of the network management apparatus 100 are stored. The data storage unit 105 and the auxiliary storage device 106, which finally stores data related to the system, are configured to include the secondary storage device 106 to store the information data accessed by the network controller 50. A first database 106A for storing and a second database 106B for storing the information data accessed by the network management apparatus 100 are comprised.

Next, the operation of the network controller 50 described above will be described with reference to the operation flowchart shown in FIG.

In the normal state, the network controller 50 periodically polls and checks the state of each base station to hold state information of each base station. When predetermined data is received from the base station (ST1), the first processor 53 performs a predetermined control procedure based on the data received from the base station (ST2).

Thereafter, when the predetermined control procedure is completed, the first processor 53 determines whether the received processed data is access data (ST3), which means that the message_ID of the received processed data is the access data information storage unit. It is determined whether it is included in the message_ID stored in (56).

In addition, in step ST3 of determining whether the received processed data is access data, if it is determined that the access data, the first processor 53 is the first of the auxiliary storage device 106 provided in the network management device 100. The data is accessed in the database 106A (ST4).

In step ST3 of determining whether the received processed data is access data, if it is determined that the received data is not the access data, the first processor 53 transmits the received processed data to the network management apparatus 100 (ST5). ).

Thereafter, the data transmitted to the network management device 100 is processed by the second processor 103 to access the received data in the second database 106B of the auxiliary storage device 106.

That is, in the data access method having the above-described configuration, when the first processor 53 of the network controller 50 determines whether the data received from the base station is the access data, and determines that the access data is the access data, the network management apparatus ( If the data is controlled to be accessed by the first database 106A of the auxiliary memory device 106 provided at 100 and it is determined that the data received from the base station is not the access data, the received data is transmitted to the network management device 100. As described above, the second processor 103 of the network management apparatus 100 processes the data received from the network controller 50 to access the data received and processed by the second database 106B of the auxiliary storage device 106. Done.

Therefore, according to the above, only the data received from the network controller does not go through a predetermined control procedure through the network management apparatus, and the data access distributed processing for directly accessing the data processed by the network controller to the auxiliary storage device. In addition, the loss of information generated by the network management device can be prevented, and the time required for accessing the data can be shortened.

In addition, it is possible to reduce the load on the network management device by the data directly accessed from the network controller to the auxiliary storage device without going through the network management device.

In addition, this invention is not limited to the said Example, It can variously deform and implement within the range which does not deviate from the technical summary of this invention.

As described above, according to the present invention, it is possible not only to reduce the load on the network management device by the data directly accessed from the network controller to the auxiliary storage device, but also through the network management device. This can prevent loss of data and reduce the time required for data to be accessed.

Claims (1)

In the satellite communication system providing a communication between subscribers by combining a plurality of base stations combined with a plurality of subscribers via satellite, A data processing step of processing data received from the base station; An access data determination step of determining whether the data processed in the data processing step is access data, A data access step of accessing the processed data to a database of the auxiliary storage device when it is determined that the data processed in the data processing step is the access data in the access data determination step; In the access data determination step, if it is determined that the data processed in the data processing step is not the access data, the data in the satellite communication system comprising a data transmission step for transmitting the processed data to the network management device Access method.

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