KR19990039717A - Method and device for deleting subscriber number in satellite communication system - Google Patents

Abstract

The present invention relates to a method and a device for deleting a subscriber number in a satellite communication system suitable for selectively deleting subscribers accommodated in an arbitrary base station. A satellite communication system providing a communication function; The input parameter storage step of storing the start EN number and the end EN number defining the deleted subscriber number together with a predetermined subscriber number deletion command, and sequentially increasing the EN numbers from the start EN number to the end EN number. Determining whether the corresponding subscriber number is in service after recognizing the corresponding subscriber number, and storing the subscriber number for the subscriber number which is not in service, and the subscriber state from the subscriber state determination step to the end EN number. And a subscriber number deleting step of deleting the stored subscriber number after the determination.

Description

Method and device for deleting subscriber number 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 and apparatus for deleting a subscriber number in a satellite communication system that enables selective deletion of subscribers contained in an arbitrary base station.

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

In the satellite communication, a pre-assignment multiple access (PAMA) method of allocating communication channels for each subscriber before a predetermined time in accordance with the channel assignment method and a DAMA (Demand Assignment Multiple) for allocating communication channels according to a subscriber's request. Access) method, in general, the DAMA method for voice communication and the PAMA method for data communication are adopted in consideration of the cost and effectiveness of the communication channel.

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

In Figure 1, reference numeral 1 is a satellite having a plurality of communication channels, 2 is a central control station for controlling the entire satellite communication system, 3 (3A, 3B) is a public switched network (11A, 11B) or telephone (12A, 12B) Communication function between the various terminals through data transmission and reception with the central control station 2 as well as an interface function for terminals such as data terminals 13A and 13B and facsimile 14A and 14B, such as a computer. The base station that provides.

In FIG. 1, reference numeral S denotes a service channel for transmitting and receiving control data, and T denotes a traffic channel for transmitting and receiving data or voice.

In the above configuration, in the normal state, the central control station 2 transmits the control message through the service channel S, and then, based on the response message transmitted from the base station 3, states of each base station 3. That is, it performs a polling function to check the availability of the communication capacity or the communication channel. When there is a call request from a specific base station, for example, the base station 3A to the terminal of the base station 3B, it is determined whether the corresponding base station 3B is in a state in which communication is possible based on the information obtained in the polling process. In the case of the communicable state, the available traffic channel T of the satellite is allocated to both base stations 3A and 3B so that both base stations 3A and 3B can directly communicate with each other.

Subsequently, when the communication between the base stations 3A and 3B is terminated and the communication termination signal is applied through the service channel S from the base station 3A, which has been requested for communication, the central control station 2 is applied to both base stations. By executing the communication termination process, the traffic channel T provided to both the base stations 3A and 3B is released.

2 is a block diagram showing a specific configuration of the central control station 2 described above.

In the drawing, reference numeral 21 denotes an antenna for transmitting and receiving satellite 1, an uplink signal, and a downlink signal, and 22 denotes an antenna for transmitting and receiving through the antenna 21 by using a polarization property of frequency. An Orthogonal Mode Transducer for separating and inputting and outputting a signal, and a Low Noise Amplifier for low noise amplifying a downlink frequency signal of 12.25 to 12.75 GHz input through the Orthogonal Mode Transducer, A down converter for converting a frequency signal applied through a low noise amplifier into, for example, an intermediate frequency signal IF of 70 MHz, and an IF of 70 MHz applied from an IF combination / distributor 23 to be described later. An up-converter for converting a signal into microwaves of 14.0 to 14.5 GHz to generate an uplink frequency signal, and an uplink frequency signal output from the frequency-up converter An RF processor configured to include a high power amplifier (High Power Amplifier) for amplifying.

In addition, reference numeral 23 separates and outputs the intermediate frequency signal applied from the RF processor 22 into a plurality of intermediate frequency signals, and is applied from the SCPC (Single Channel Per Carrier) channel unit 24 to be described later. IF is a combination divider (Combiner / Distributer) for outputting the combined intermediate frequency signal, 24 is a network control unit to demodulate and decode and output the intermediate frequency signal applied from the IF combination distribution unit 23, which will be described later SCPC channel unit that encodes, modulates and outputs messages 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 indicates a state of each base station 3 based on a response message transmitted from the base station 3 after sending a control message to each base station 3 through a specific SCPC channel unit 24. Both base stations perform a polling function to check and, if there is a call request from a specific base station, allocates the available traffic channel (T) and modem to the base station (3) based on the information obtained during the polling process. It is a network control unit that performs overall system control such as to enable mutual communication.

In addition, reference numeral 40 denotes a network management system for system administrators to manage the overall network of the satellite communication system, and reference code MPH (Main PCM Highway) denotes a data bus and UPH (Utility) for transmitting and receiving information data such as voice signals and data signals. PCM Highway) is a control bus through which control data is transmitted and received.

3 is a block diagram showing the configuration of the network controller 30 described above.

In the figure, reference numeral 31 denotes a processor for controlling the entire system, and 32 denotes an S-ALOHA packet by extracting packet information from a message applied from the SCPC channel unit 24, and the SCPC channel unit 24. The service channel controller generates and outputs a message of a TDM stream.

Further, reference numeral 33 denotes a dual port RAM, which is provided for data transmission and reception between the processor 31 and the service channel controller 32.

Reference numeral 34 denotes a program storage unit for storing the operation program of the processor 31, and 35 denotes a base station information storage unit for storing information of each base station obtained by the polling operation of the processor 31.

That is, in the above-described configuration, the processor 31 stores base station information decoded and input from the service channel controller 32 according to a polling operation for each base station 3. The processor 31 allocates an available communication channel and a communication modem to both base stations 3 when a predetermined call request is made from an arbitrary base station 3 to another base station 3 so that both of the base stations 3 mutually support each other. It will be controlled to enable communication.

On the other hand, in order to delete any subscriber in the satellite communication system, the operator directly inputs a predetermined Man-Machine Communication (MMC) command for each subscriber number.

By the way, when deleting a plurality of subscriber numbers, but also trying to delete a plurality of subscriber numbers registered in a plurality of base stations 3, as described above, the subscriber number deletion instruction is manually performed for each subscriber number. It was very inconvenient because all had to be entered.

That is, in general, up to four subscriber boards (TDCs) are mounted in each base station, and up to 12 subscriber numbers are registered in one subscriber board. It is possible to delete the corresponding subscribers when all of the subscriber deletion commands have been entered. In order to delete the subscriber number registered on one or more subscriber boards, the same subscriber deletion command has to be repeatedly entered more than 12 times.

Accordingly, the present invention was created in view of the above circumstances, and when an operator selects and inputs a range of subscriber numbers to be deleted from subscribers accommodated in a base station, all selected subscriber numbers are deleted at the same time unless the corresponding subscriber number is currently in use. An object of the present invention is to provide a method and a device for deleting a subscriber number in a satellite communication system.

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

FIG. 2 is a block diagram showing the configuration of the central control station 2 in FIG.

FIG. 3 is a block diagram showing the configuration of the network controller 30 in FIG.

Figure 4 is a block diagram showing the configuration of the subscriber number deletion apparatus in the satellite communication system according to an embodiment of the present invention.

5 is a flowchart illustrating a subscriber number deletion method in a satellite communication system according to an embodiment of the present invention.

* Brief description of the main parts of the drawing

1: satellite 2: central control station

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

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

14A, 14B: Facsimile 21: Antenna

22: RF processing unit 23: IF combination distribution unit

24: SCPC Channel Unit (SCU) 30: Network Control Unit

31, 51: processor 32: service channel controller (SCC)

33: Dual Port RAM 34, 52: Program Storage

35: base station information storage unit 40: network management system

53: subscriber number temporary storage 54: subscriber service status information storage

55: input parameter information storage unit

56: EN (Equipment Number) -Subscriber Number Conversion Table

57: timer

In the satellite communication system according to the first aspect of the present invention for achieving the above object, a subscriber number deletion method is provided in a satellite communication system that provides a communication function between subscribers by combining a plurality of base stations respectively coupled with a plurality of subscribers through satellites. In; The input parameter storage step of storing the start EN number and the end EN number defining the deleted subscriber number together with a predetermined subscriber number deletion command, and sequentially increasing the EN numbers from the start EN number to the end EN number. Determining whether the corresponding subscriber number is in service after recognizing the corresponding subscriber number, and storing the subscriber number for the subscriber number which is not in service, and the subscriber state from the subscriber state determination step to the end EN number. And a subscriber number deleting step of deleting the stored subscriber number after the determination.

In addition, in the satellite communication system according to the second aspect of the present invention, a subscriber number deleting apparatus includes a plurality of base stations, each coupled with a plurality of subscribers, and a central control station coupled with the base station satellite to provide a communication function between the subscribers. In a satellite communication system; Input parameter information storage unit for storing the start EN number and end EN number input by the operator, and subscriber service status information storage unit for storing as a predetermined flag data whether the subscriber is in service or not, and the subscriber number to be deleted. Subscriber number temporary storage for temporarily storing the information, EN-subscriber number conversion table that stores the subscriber number corresponding to the EN number, from the start EN number to the end EN number stored in the input parameter information storage unit It is characterized in that it comprises a control unit for controlling to delete the subscriber number for the non-service subscriber number by determining whether each subscriber number is in service after recognizing the corresponding subscriber number by sequentially increasing the number.

That is, according to the above, it is possible to simultaneously delete subscribers in the range that the operator wants to delete by one command.

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

Figure 4 is a block diagram showing the configuration of the subscriber number deletion apparatus in the satellite communication system according to an embodiment of the present invention.

In the drawing, reference numeral 51 is a processor for controlling the entire system, 52 is a program storage unit for storing an operation program of the processor 51, 53 is a temporary subscriber number to be deleted according to a control signal of the processor 51. The subscriber number temporary storage unit 54 for storing the information is a subscriber service status information storage unit for storing state information on whether the subscriber is currently in service as predetermined flag data.

In addition, reference numeral 55 denotes an input parameter information for storing an input parameter for a subscriber number to be selectively input from the network management system 40, for example, a start EN number and an end EN number. 56 is an EN-subscriber number conversion table in which an EN number assigned by each base station and a subscriber number (DN number) corresponding to the EN number are stored, and 57 is a timer for generating predetermined time data.

Herein, the EN number represents location data of a subscriber number registered on the subscriber board. 12 subscriber numbers can be registered on one subscriber board, and EN numbers are determined to correspond to the subscriber numbers.

That is, in the present invention having the above-described configuration, the processor 51, based on this input parameter when the range defining the subscriber to delete together with the predetermined subscriber delete instruction from the network management system 40, that is, the input parameter is input. If the subscriber of the corresponding subscriber number is not in the service (call) by knowing the corresponding subscriber number, it controls to delete the subscriber.

Next, a method of deleting a subscriber number according to the present invention will be described with reference to the flowchart of FIG. 5.

When the processor 51 enters a predetermined subscriber number deletion instruction from the network management system 40 and a parameter defining a subscriber number to be deleted, for example, a start EN number and an end EN number (step ST1), It is determined whether the input parameter has a normal format (ST2 step).

Subsequently, if the format of the parameter input in step ST2 is not normal, the processor 51 outputs a predetermined error message to the network management system 40 (step ST3). At this time, the network management system 40 notifies the operator of the state by outputting the input error message through a predetermined output device.

On the other hand, when the format of the input parameter is normal in step ST2, the processor 51 stores and controls the input parameter, that is, the start EN number and the end EN number, in the input parameter information storage unit 55 (step ST4). ).

Subsequently, the processor 51 determines whether a subscriber corresponding to the EN number exists based on the start EN number stored in the input parameter information storage unit 55 (step ST5). At this time, if there is a subscriber corresponding to the EN number, the subscriber number (DN number) corresponding to the start EN number is recognized with reference to the EN-subscriber number conversion table 56 (step ST6).

When the subscriber number becomes a normal registered subscriber, the processor 51 retrieves service state information stored in the subscriber service state information storage unit 54 based on the subscriber number (step ST7). At this time, if the corresponding subscriber number is not in the service state (that is, during a call) as a result of the search of the service state information, the subscriber number is stored and controlled in the subscriber number temporary storage unit 53 (step ST8).

Subsequently, the processor 51 determines whether the EN number corresponding to the subscriber number currently being deleted is the end EN number stored in the input parameter information storage unit 55 (step ST9). At this time, if the corresponding EN number is not the end EN number, the operation of the steps ST5 to ST9 is repeatedly performed for the next EN number (step ST10).

On the other hand, when the corresponding subscriber number is in the service state in step ST7, the processor 51 performs count control to count a predetermined time by driving control of the timer 57 (step ST11). At this time, when the timer 51 counts a predetermined time, the timer 51 outputs the predetermined counting end signal. When the counting end signal is input, the processor 51 resets the timer 57 and counts again. Thus, when the count end signal is input three times, the processor 51 proceeds to step ST9 to execute control of the next operation (step ST12).

Subsequently, when the EN number corresponding to the subscriber number currently being deleted in step ST9 becomes an end EN number, the processor 51 may have the same EN-subscriber number as the subscriber number stored in the subscriber number temporary storage unit 53. The subscriber number of the conversion table 56 is deleted and the subscriber number of the subscriber number temporary storage unit 53 is deleted (step ST13).

Then, the processor 51 outputs a predetermined subscriber number deletion result message to the network management system 40 (step ST14).

Then, the network management system 40 notifies the operator of the current subscriber number deletion operation by outputting the result message through a predetermined output device according to the inputted subscriber number deletion result message.

Therefore, according to the above embodiment, it is possible to simultaneously delete subscribers in a range to be deleted by the operator by one command.

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, when the operator selects and inputs a range of subscriber numbers to be deleted from subscribers accommodated in the base station, the satellite communication system can delete all selected subscriber numbers simultaneously unless the corresponding subscriber number is currently in use. In the subscriber number deletion method and apparatus can be realized.

Claims (6)

A satellite communication system for providing a communication function between subscribers by combining a plurality of base stations each coupled to a plurality of subscribers via satellites; An input parameter storing step of storing a start EN number and an end EN number defining a deleted subscriber number together with a predetermined subscriber number delete command; The subscriber stores the subscriber number for the non-service subscriber number by determining whether each subscriber number is in service after increasing the EN number sequentially from the start EN number to the end EN number and recognizing the corresponding subscriber number. Status determination step, And a subscriber number deletion step of deleting the stored subscriber number after determining the subscriber state up to the end EN number in the subscriber state determination step. The method of claim 1, And determining whether or not the input parameter is normal by determining whether the input parameter is normal in the input parameter storage step, and outputting an error message. The method of claim 1, In the subscriber status determination step, the subscriber number corresponding to the EN number is sequentially recognized, and if the subscriber number is not the registered subscriber number, the subscriber number is ignored. Subscriber number deletion method in a satellite communication system, characterized in that configured to include. The method of claim 1, If the subscriber number is in service after judging the subscriber state in the subscriber state determination step, wait for a predetermined time to determine whether to release the service, and if the service is not released until the time elapses, the subscriber state for the next EN number And a subscriber number processing step in service for performing the determination operation. The method of claim 1, And a deletion result message outputting step of outputting a predetermined deletion result message for the subscriber number deletion result after the subscriber number deletion. A satellite communication system comprising a plurality of base stations each coupled with a plurality of subscribers, and a central control station coupled with the base station satellites to provide a communication function between the subscribers; An input parameter information storage unit for storing a start EN number and an end EN number input by an operator; A subscriber service status information storage unit for storing whether or not the subscriber is in service as predetermined flag data, Temporary storage of subscriber number for temporarily storing the subscriber number to be deleted, EN-subscriber number conversion table that stores subscriber number corresponding to EN number, Increasing the EN number sequentially from the start EN number stored in the input parameter information storage unit to the end EN number, recognizing the corresponding subscriber number, and determining whether each subscriber number is in service and not in service. Apparatus for deleting a subscriber number in a satellite communication system, characterized in that it comprises a control unit for controlling to delete the subscriber number.