KR100226605B1 - Method for managing board in satellite communication system - Google Patents

Abstract

The present invention relates to a board management method in a satellite communication system for easily managing a plurality of SCPC channel unit (or communication modem) board to be mounted in a plurality of base stations from a central control station of a remote location, each with a plurality of subscribers and A satellite communication system for providing a communication function between subscribers by connecting a plurality of base stations coupled to the satellite; When a predetermined command message for the SCPC channel unit is received from the operator side, a logical-physical number conversion step of extracting a logical number and converting it into a physical number, and a command including a physical number converted in the logical-physical number conversion step A command message broadcasting step of broadcasting a message to a base station, a physical-logical number conversion step of extracting a physical number and converting the physical number into a logical number when a response message to the command message is received from the base station, and the physical-logical number conversion step Characterized in that it comprises a response message output step of outputting a response message including the logical number converted in the operator side.

Description

Board Management Method in Satellite Communication System

The present invention relates to a communication system using a satellite, and in particular, a board management in a satellite communication system to easily manage a plurality of SCPC channel unit (or communication modem) board to be mounted in a plurality of base stations from a remote central control station It is about a method.

Recently, with the rapid development of communication technology, satellite communication, which enables subscribers who are located at remote sites to make calls through satellites, is becoming increasingly common. Such satellite communication is mainly used as a long distance communication between countries, or a communication method in a mountainous country such as Korea, because a separate signal line is not required for a call.

In the above-mentioned satellite communication, a PAMA (Pre Assignment Multiple Access) method for pre-assigning each communication channel for each subscriber according to the channel assignment method and a DAMA (Demand Assignment Multiful Access) method for allocating a communication channel according to a subscriber's request There are two methods. In general, in the satellite communication system for communication between subscribers, many DAMA methods are adopted in consideration of the cost and the effectiveness of the communication channel.

1 is a block diagram showing the overall system configuration of a general satellite communication system according to the DAMA method.

In Fig. 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, and 3 (3A, 3B) is an exchanger (11A, 11B) or a telephone (12A, 12B). And interface functions for terminals such as data terminals 13A and 13B and facsimile 14A and 14B, such as a computer, and communication between the various terminals through data transmission and reception with the central control station 2. It provides a base station.

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. The service channel S is a time division multiple channel (TDM) for transmitting control data from the central control station 2 to the base station 3 and for transmitting control data from the base station 3 to the central control station 2. Refers to the S-ALOHA (Slotted ALOHA) channel.

In the above configuration, the central control station 2 transmits a control message through a service channel in a normal state, and then, for example, communicates the state of each base station 3 based on a response message transmitted from the base station 3. It performs polling function to check the current state of modem or use of communication channel. When there is a call request from a specific base station 3A to a terminal in the jurisdiction of another 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 a communicable state, an available traffic channel T 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 which has been provided to both base stations 3A and 3B is released.

On the other hand, the base station (3) is a processor for controlling the overall device, an RF signal processing unit that is provided outdoors, demodulates and decodes the signal input through the RF signal processing unit or by encoding and modulating a predetermined message to the RF signal It is composed of SCPC channel unit output to processing unit, telephone data card to connect satellite network subscriber, and trunk interface port to connect to public switched telephone network.

In addition, most of the plurality of boards except for the outdoor device (for example, the RF signal processor) are mounted on an apparatus (generally called a rack) having a shape as shown in FIG. 2 to be connected to the processor. have. First, the ten grooves on the vertical axis of the rack are slots, and slot numbers (Slot_ #) are given to each slot, and four stages on the horizontal axis are given shelf numbers (Shelf_ #) to each shelf by the shelf.

The mounting position of each functional board is, for example, because the processor is redundant, the first and second (slot_0 and 1 of the shelf_0) and the trunk interface ports are the third and fourth (slot_ of the shelf_0). 2 and 3), the telephone data card is divided into the third to sixth (slots _2 to 5 of the shelf_0) and the like.

By the way, up to 32 SCPC channel units are to be mounted in the base station (3), it is possible to be mounted in any position of the rack except the shelf and the slot position in which the processor is mounted. That is, the SCPC channel unit board does not have a specific location for mounting, so the operator can mount and use it in any of 38 slots.

Thus, when managing a plurality of SCPC channel unit boards currently mounted in multiple base stations 3 at a remote control station 2 (e.g., arbitrarily retrieving the state of the corresponding boards), in particular 32 In some cases, the SCPC channel unit may not be mounted, so the operator may have to know the actual location of the board, for example, shelf number and slot number.

Accordingly, the present invention has been made in view of the above, and when managing a plurality of SCPC channel unit boards to be mounted in a plurality of base stations in a remote central control station instead of the actual mounting location number (physical number) It is an object of the present invention to provide a method for managing a communication modem board in a satellite communication system that provides easy management of a board by allowing an operator to manage based on a predetermined number (logical number) arbitrarily located.

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

FIG. 2 is a perspective view showing a rack appearance of a board mounted state of the satellite communication system shown in FIG. 1; FIG.

3 is a block diagram illustrating a board management method in hardware in a satellite communication system according to an embodiment of the present invention.

4 is a flowchart illustrating a board management 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 101: Processor

102: Dual Port RAM (103) 103: Service Channel Controller (SCC)

104: program storage unit 105: data storage unit

106: number conversion processing unit 107: conversion table

110: network management device 120: operator terminal

In the satellite communication system according to the present invention for realizing the above object, a board management method comprising: a satellite communication system providing a communication function between subscribers by connecting satellites to a plurality of base stations respectively coupled to a plurality of subscribers; When a predetermined command message for the SCPC channel unit is received from the operator side, a logical-physical number conversion step of extracting a logical number and converting it into a physical number, and a command including a physical number converted in the logical-physical number conversion step A command message broadcasting step of broadcasting a message to a base station, a physical-logical number conversion step of extracting a physical number and converting the physical number into a logical number when a response message to the command message is received from the base station, and the physical-logical number conversion step Characterized in that it comprises a response message output step of outputting a response message including the logical number converted in the operator side.

That is, according to the above, when the operator manages the SCPC channel unit to be mounted in a plurality of base stations, it is possible to easily manage by managing based on an arbitrary logical number rather than based on the actual location number. .

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

FIG. 3 is a block diagram schematically showing the configuration of a central control station in order to hardwarely explain a board management method in a satellite communication system according to an embodiment of the present invention.

In the figure, reference numeral 101 denotes a processor as a control unit for performing overall control of the satellite communication system, and 103 denotes a predetermined S-ALOHA packet while extracting packet information from a message applied from the SCPC channel unit. A service channel controller 102 which generates a message and outputs it to the SCPC channel unit is a dual port RAM, which is provided for data transmission and reception between the processor 101 and the service channel controller 103.

In addition, reference numeral 104 is a program storage unit for storing the operation program of the processor 101, 105 is a logical input of the SCPC channel unit, for example, mounted in any base station 3 input from the operator terminal 120. A data storage unit for storing the number, channel number of the utility pulse code modulation (PCM) bus, and a board type such as, for example, a processor board, a telephone data card board, a trunk interface board, and 107 are stored in the data storage unit 105. A conversion table for storing a predetermined physical number corresponding to the logical number, 106 is a logical number based on the data of the conversion table 107 on the basis of the control signal from the processor 101, It is a number conversion processing unit that converts a physical number into a logical number.

In addition, reference numeral 110 is connected to the operator terminal 120 and the network management device for managing the satellite communication system while transmitting and receiving a predetermined control and data signal with the processor 101, 120 is to inform the operator of the state of the satellite communication system By outputting a predetermined command signal input from the operator to the network management device 110 is an operator terminal that allows the operator to directly manage the system.

Next, an embodiment according to the present invention will be described with reference to the flowchart of FIG. 4.

First, when a board type and a logic number are input through the operator terminal 120 (step ST401), the network management apparatus 110 outputs it to the processor 101. Then, the processor 101 determines whether the board type and logical number input through the operator terminal 120 are data input in a normal format (step ST402).

As a result of the determination in step ST402, if the logical number or board type is not a normal data format, a predetermined error message is output to the operator (step ST403).

On the other hand, if it is determined in step ST402 that the logical number and the board type are in a normal format, the processor 101 controls the number conversion processor 106 to convert the logical number into a predetermined physical number (ST403). step). That is, the number conversion processing unit 106 converts the physical number based on the physical number data corresponding to the logical number of the conversion table 107 based on the control signal of the processor 101 (step ST404).

When the number conversion is completed as described above, the processor 101 reads the channel number of the utility PCM bus stored in the data storage unit 105 (step ST405), and then goes to the base station 3 together with the physical number. It will be sent (ST406). Then, the processor 101 waits for a predetermined response signal from the base station 3 (step ST407).

On the other hand, when a physical number, a utility PCM bus channel number, and a predetermined command signal are inputted from the central control station 2, the processor as a control unit makes a predetermined value based on the utility PCM bus channel number for the board corresponding to the physical number. The command signal is extracted to perform a series of control operations. When the series of control operations are completed, the base station processor outputs the physical number of the corresponding board and the predetermined response signal to the central control station 2.

Subsequently, the central control station 2 waits for a predetermined response signal transmitted from the base station 3 and outputs a predetermined timeout signal (TimeOut) signal to the network management apparatus 110 when a predetermined time elapses. (ST409 step). Then, the network management device 110 outputs a predetermined message according to the operator terminal 120.

On the other hand, when the central control station 2 receives a predetermined response signal from the base station 3 (step ST408), the processor 101 controls the number conversion processing unit 106 to receive the received response from the base station 3. Control to convert the physical number to a predetermined logical number (step ST410).

Subsequently, when the physical number is converted into a logical number, the processor 101 outputs the logical number and the response result to the operator (step ST411).

That is, according to the above, when the operator manages the SCPC channel unit to be mounted in a plurality of base stations, the operator can manage based on an arbitrary logical number rather than based on the actual location number.

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

As described above, according to the present invention, when managing a plurality of SCPC channel unit boards to be mounted in a plurality of base stations, a predetermined position number arbitrarily placed by an operator is not based on the actual mounting position number. On the basis of this, the board management method can be realized in the satellite communication system that can be managed by the central control station at the remote site.

Claims (1)

A satellite communication system for providing a communication function between subscribers by connecting satellites to a plurality of base stations, each coupled to a plurality of subscribers; A logical-physical number conversion step of extracting a logical number and converting the logical number into a physical number when a predetermined command message for an SCPC channel unit is received from an operator; A command message broadcasting step of broadcasting a command message including a physical number converted in the logical-physical number conversion step to a base station; A physical-logical number conversion step of extracting a physical number and converting the logical number into a logical number when a response message to the command message is received from the base station; And a response message output step of outputting a response message including the logical number converted in the physical-logical number conversion step to an operator.