KR100245160B1 - Method for maintaining data consistency between multiple operator terminals in satellite communication system - Google Patents

Abstract

In the present invention, in managing a satellite communication system having a plurality of operator terminals, the plurality of operators in the satellite communication system that can maintain the data correspondence between the operator terminal with respect to the update (update) made through each operator terminal. The present invention relates to a method of maintaining data consistency between terminals, and in a satellite communication system in which a plurality of operator terminals are connected and operated, command information registered in a memory as a system change command using a command input through an arbitrary operator terminal. And a flag level of the state storage unit if it is determined to be the same command as the UPD command registered in the UPD command selection step. Status flag setting step to set as level, input command is executed. In the command execution step of executing the corresponding command by transmitting to the earth station that is the target of the row, the status flag level checking step of confirming whether the level of the status flag set in the status flag setting step after the command execution is the first level, and in this status flag level checking step The system information update step of downloading the changed system information to all the operator terminal when the level check result is determined as the first level, and resets the flag level set in the status flag setting step after the system information update execution. And a flag reset step.

Description

Method of Maintaining Data Consistency between Multiple Operator Terminals in Satellite Communication System

The present invention manages a satellite communication system having a plurality of operator terminals, the satellite communication system that can maintain the data consistency between the operator terminal with respect to the update (update) made through each operator terminal The present invention relates to a method for maintaining data consistency between multiple operator terminals.

When the network operator who manages the satellite communication network needs to control the subordinate base station or the central control station, the M & C (Monitoring & Control) command is transmitted to the earth station through the operator terminal operated as an interface device between the operator and the system. The earth station is to perform the operation according to the M & C command input through the operator terminal, and the result is to send the message back to the operator terminal.

Meanwhile, in the recently developed satellite communication system, a plurality of network managers can be connected to the system individually through their respective operator terminals, thereby enabling a more multiplexed management system in the operation of the satellite communication system. Is a block diagram illustrating a network management and control process of a satellite communication system equipped with a plurality of operator terminals.

In Fig. 1, reference numeral 1 denotes a satellite having a plurality of communication channels, 2 denotes a central control station for controlling the entire satellite communication system, and 3 (3A, 3B) denotes an exchange 11A, 11B or a telephone 12A, 12B. The terminal by interfacing to terminals such as data terminals 13A and 13B and facsimile 14A and 14B, such as a computer, and establishing a call through data communication with the central control station 2. It is a base station that provides a call function.

The configuration of the central control station 2 is as follows.

Reference numeral 10 is an antenna for transmitting / receiving an uplink signal transmitted to the satellite 1 side and a downlink signal transmitted from the satellite, and 20 is an ultra-high frequency received by the antenna 10. RF transmitter / receiver for converting downlink signal of band to intermediate frequency (IF) signal and converting 70MHz band of intermediate frequency (IF) signal to RF signal of ultra high frequency band at the same time for uplink signal, and 30 is 70MHz IF processing stage that processes intermediate frequency (IF) signals in the band.

In addition, reference numeral 40 performs a polling function for checking the status of each base station based on a response message transmitted from the base station after transmitting a control message to each base station through the IF processing unit 30, If there is a call request, the base station determines whether the other base station can communicate based on the information obtained during the polling process. If the communication is possible, the base stations allocate the available traffic channels of the satellite to both base stations. A network control unit that performs system control, such as to directly perform mutual communication.

In addition, reference numeral 50 is a network management system that enables the satellite network operation manager to monitor the overall network operation status and to control the entire satellite system including the base station as needed. Reference numeral 50 is made up of a plurality of terminals 5 _{1 to} 5n so that a plurality of network managers can access the system through their respective terminals to enable individual simultaneous work.

That is, in the conventional satellite system having the above-described configuration, when there is a call setup request from an arbitrary subscriber base station 3, the processor (not shown) inside the network control unit 40 obtains base station information obtained by polling, and Based on the available channel state information, the channel of the requested bandwidth is allocated among the currently available communication channels. In addition, when the network operator needs to update the data in the base station or the central station, or control the operation of some components, one of the plurality of operator terminals 5 _{1 to} 5 _n provided in the network management system 50 is required. The control unit transmits the corresponding M & C (Monitoring & Control) command to the network control unit 40. The network control unit 40 transmits the control command received from the operator terminal to the corresponding earth station through the service channel. By notifying the command input operator terminal side of the control command execution result transmitted from the network management system 50 is provided so that the operator can check the command execution result through the monitor provided in the terminal.

Meanwhile, as described above, among the commands input through the operator terminals 5 _{1 to} 5n, commands related to updating or newly registering and deleting existing system information, that is, system change commands (hereinafter, referred to as UPD commands) are included. If the system information identified by each terminal is different from each other and is different from each other with respect to the data updated through each operator's terminal, the confirmed system information may not be reliable, and great confusion may occur in operating the entire system. There is a problem.

The present invention was created in view of the above-described circumstances, and maintains data consistency between operator terminals in an update made through each operator terminal in a satellite communication system operating a plurality of operator terminals. It is an object of the present invention to provide a method for maintaining data consistency between multiple operator terminals in a satellite communication system.

1 is a block diagram schematically showing the configuration of a conventional satellite communication system having a plurality of operator terminals.

2 is a block diagram showing the configuration of a central control station of a satellite communication system equipped with a function of maintaining data consistency between multiple operator terminals according to an embodiment of the present invention.

3 is a flowchart for explaining the control operation of the central control station processor 41 shown in FIG.

Explanation of symbols on the main parts of the drawings

1: satellite 2: central control station

3A, 3B: base station 11A, 11B: switchboard

12A, 12B: Telephone 13A, 13B: Data Terminal

14A, 14B: Facsimile 10: Antenna

20: RF transceiver 21: Orthogonal mode converter (OMT)

22: RF receiver 23: RF transmitter

30: IF processing stage 31: intermediate frequency combination / distribution unit

32,33: SCPC channel unit 40,400: network control unit

41: processor

42: Service Channel Controller (SCC)

43: DP RAM 44: Program Storage

45: base station information storage unit 46: channel information storage unit

47: UPD command storage unit 48 : State storage unit

50: the network management system 5 ₁ ~5n: an operator terminal

In the satellite communication system in which a plurality of operator terminals are connected and operated, a command input through an arbitrary operator terminal is stored in a memory as a system change command. The UPD instruction screening step of determining whether or not the system change command is based on the sameness and comparing with the registered command information, and if it is determined to be the same command as the UPD command registered in the UPD command screening step, A state flag setting step of setting a flag level to a first level, an instruction execution step of transmitting an input command to an earth station as an execution target, and executing a corresponding command; and after the instruction execution, the level of the state flag set in the status flag setting step is first. Status flag level checking step to check whether the level, In the status flag level checking step, if it is determined that the level is determined as the first level, the system information updating step of downloading the changed system information to all the operator terminals as a result of the command execution, and in the status flag setting step after executing the system information update, And a status flag reset step of resetting the flag level.

That is, according to the present invention having the above-described configuration, it is possible to maintain data consistency between the operator terminals with respect to updates made through each operator terminal when operating a plurality of operator terminals.

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

FIG. 2 is a block diagram showing a configuration of a central control station equipped with a data consistency maintaining function among multiple operator terminals according to an embodiment of the present invention. In FIG. 2, reference numeral 10 denotes an uplink transmitted to a satellite (not shown). An antenna for transmitting and receiving a link signal and a downlink signal transmitted from a satellite, and 20 denotes an intermediate frequency (IF) signal for a downlink signal of an ultra high frequency band received by the antenna 10. The RF transceiver 20 converts the intermediate frequency (IF) signal of the 70 MHz band into an RF signal of the ultra-high frequency band and converts the uplink signal to the uplink signal. The Orthogonal Mode Transducer (OMT) 21 and the Orthogonal Mode Transducer 21 for separating and inputting the uplink and downlink signals transmitted and received through the antenna 10 by using the RF receiver 22 for amplifying the downlink frequency signal of 12.25 to 12.75 GHz to a predetermined level and converting the amplified signal into an intermediate frequency (IF) signal of 70 MHz, for example, and a 70 MHz intermediate to be transmitted to the satellite side. An RF transmitter 23 converts a frequency (IF) signal into a microwave of 14.0 to 14.5 GHz and amplifies the signal to a predetermined level to generate an uplink frequency signal.

Further, reference numeral 30 denotes an IF processing stage for processing a transmission / reception intermediate frequency (IF) signal in a 70 MHz band, and the IF processing stage 30 receives an intermediate frequency (IF) signal applied from the RF receiver 22. Intermediate frequency combination / distribution unit for separating and outputting a plurality of intermediate frequency signals and outputting a combination of intermediate frequency signals applied from a single channel per carrier (SCP) channel unit (SCU) 33 to be described later. C / D) 31 and the first SCPC channel unit for demodulating, decoding and outputting the IF signal applied from the intermediate frequency combination / distributor 31 and the message output from the network controller 40 to be described later. It consists of a second SCPC channel unit 33 which is encoded, modulated and output.

In addition, reference numeral 400 transmits a control message to each base station through the SCPC channel unit 33 and performs a polling function to check the status of each base station based on a response message transmitted from the base station, and a polling process. It is a network controller that controls the channel assignment based on the information obtained from and executes network management for the user management network.

On the other hand, the network control unit 400 not only controls the call processing between the base stations, but also communicates with the network management system 50 composed of the plurality of operator terminals 5 _{1 to} 5n, and executes control commands transmitted from each operator terminal. The processor 41 which executes the system-wide control operation according to the operator input command by sending to the earth station and notifying the operator terminal of the response message transmitted from the earth station, and from the message authorized by the SCPC channel unit 32. A service channel controller (SCC) 42 which extracts packet information and generates and outputs a message of a time division multiplex (TDM) stream to the SCPC channel unit 33. And dual port RAM 43 for transmitting and receiving data between the processor 41 and the service channel controller 42, and operation of the processor 41. A program storage unit 44 in which a program is stored, a base station information storage unit 45 storing state information of each base station obtained by the above-described polling operation, and a channel information storage unit 46 storing a state of use of a communication channel. And an UPD instruction storage unit 47 storing the UPD instruction as data as a basis for indexing the UPD instruction with respect to the instruction inputted through the operator terminals 5 _{1 to} 5n, and the operator terminal 5 _1. And a state storage section 48 for storing and setting as a predetermined state flag whether or not the UPD instruction word has been input through ˜5n).

In addition, the reference numeral 50 is provided with a plurality of operator terminals (5 ₁ ~ 5n) to allow the satellite network network manager operating each terminal to monitor the overall network operating status and to change the system information as necessary It is a network management system that can control the entire satellite system including the base station by adjusting the operating state.

Next, the operation of the apparatus having the above-described configuration will be described with reference to the flowchart of FIG.

The processor 41 in the network controller 400 receives a command input through a plurality of operator terminals 5 _{1 to} 5n and registers the command registered in the UPD command storage unit 47 according to the input order. The comparison is performed sequentially. Based on the identity, it is determined whether the corresponding command inputted by the operator is a UPD command related to the system change, and the contents of the command registered as the operation status or network operation information of the system. It checks whether it is a general command for monitoring or a UPD command related to system change. (ST 1 to ST 3)

When the result of the verification through the sequential comparison decision is confirmed as a general command, the processor 41 inside the network controller 400 records the full text of the command in the dual port RAM 43 so as to service the controller. (SCC) 42 controls to be transmitted to the target earth station as a control data channel. (ST 4)

On the other hand, when the comparison decision result in step ST 3 as a command input via the operator terminal is confirmed as a UPD command, the processor 41 is to set the flag level of the state storage unit 48 implemented as a flag register (flag register) After changing from the initial state of '0' to '1', the process proceeds to the command message transmission step of ST 4 to control the command input by the operator to be executed in the target earth station. (ST 5) At this time, the processor 41 may update and store the system information stored in the base station information storage unit 45 and the channel information storage unit 46 according to the changes according to the execution of the UPD instruction.

Thereafter, when a result message according to the instruction execution is received from the earth station where the instruction is executed, the processor 41 notifies the instruction execution result by transmitting it to the operator terminal to which the instruction was input. (ST 6 to ST 7)

Subsequently, the processor 41 checks the flag level of the state storage unit 48. When the flag level is '1' as a result of the check, all the operator terminals 5 ₁ to 5 of the network management system 50 are checked. 5n), newly updated system information is downloaded as the UPD instruction is executed, and when the download is completed, the data level maintenance operation is performed by clearing the flag level of the state storage unit 48 to '0'. (ST 8 to ST 11)

That is, according to the above embodiment, when a UPD instruction that is directly connected to a system change is input through any one of the plurality of operator terminals 5 _{1 to} 5n, the fact is recorded in the flag register and execution of the instruction is completed. At the same time, it is possible to check the status level so that the downloading can be executed as newly updated contents for all the operator terminals 5 _{1 to} 5n.

On the other hand, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the technical gist of the present invention.

As described above, according to the present invention, it is possible to maintain data consistency between the operator terminals with respect to an update content made through each operator terminal when operating a plurality of operator terminals.

Claims (1)

In a satellite communication system in which a plurality of operator terminals are connected and operated, A UPD command selection step of comparing the command input through the arbitrary operator terminal with the command information registered in the memory as the system change command, and determining whether the command is a system change command based on its identity; A status flag setting step of setting the flag level of the state storage unit to the first level if it is determined that the same command as the UPD command registered in the UPD command selection step is the first level, Command execution step of executing the command by transmitting the input command to the target earth station, A status flag level checking step of checking whether a level of the status flag set in the status flag setting step is a first level after executing the command; A system information updating step of downloading the changed system information to all the operator terminals when it is determined as the first level as a result of the level checking in the status flag level checking step, and And a status flag reset step of resetting a flag level set in the status flag setting step after the system information update is executed.

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