KR100221837B1 - Channel modem using states display device in satellite communication system - Google Patents

Abstract

The present invention relates to a satellite communication system in which the use state of a channel modem installed in each base station is checked to alert a system operator when a channel modem is additionally installed, A time data storage means for accumulating and storing the time data counted by the counting means; and a time data storage means for storing the time data in a predetermined unit of time, And a processor for calculating the average usage rate of the channel modem based on the time data and outputting the calculated result to the central control station, and a processor configured to calculate an average usage rate data of the channel modem received from each base station A plurality of base station information storing means for respectively storing the base station information, An output means for outputting an extension request message, and if the usage rate transmitted from the base station is equal to or more than a predetermined value, the utilization rate data for a predetermined period is read out from the base station information storage section corresponding to the base station, And a central control station configured to control the output unit to execute a channel modem extension request for the base station if the received signal is greater than a predetermined value.

Description

Channel modem use status indicator of satellite communication system

The present invention relates to a satellite communication system, and more particularly, to a satellite communication system in which a channel modem installed in each base station is checked for use, and when a channel modem is additionally installed, And a modem use status display device.

In recent years, with the rapid development of communication technology, satellite communication that enables subscribers located at remote locations to communicate with each other through a satellite is gradually becoming common.

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

In FIG. 1, reference numeral 1 denotes a satellite having a plurality of communication channels, reference numeral 2 denotes a central control station for controlling the entire satellite communication system, reference numerals 3A and 3B denote exchangers 11A and 11B, telephones 12A and 12B, And the data terminals 13A and 13B and the facsimile machines 14A and 14B such as a computer and also has a function of communicating with the central control station 2 through the data transmission / .

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

2 is a system configuration diagram showing a system configuration of the central control station.

Reference numeral 21 in FIG. 2 denotes an antenna for transmitting / receiving an uplink signal and a downlink signal with the satellite 1, and 22 denotes an antenna for transmitting / receiving an uplink signal and a downlink signal through the antenna 22 An orthogonal mode transducer (OMT) 23 for separately inputting and outputting signals to be transmitted and received, a low noise amplifier 23 for low-noise amplifying a downlink frequency signal of, for example, 12.25 to 12.75 GHz inputted through the orthogonal mode converter 22 LNA (Low Noise Amplifier), and 24 is a frequency down converter (DC) for converting a frequency signal applied through the low noise amplifier 23 to an intermediate frequency signal IF of, for example, 70 M Hz.

Reference numeral 25 denotes an IF demodulator which demultiplexes the intermediate frequency signal IF applied from the frequency down converter 24 into a plurality of intermediate frequency signals and outputs the intermediate frequency signals IF (IF C / D: IF Combiner / Distributor) 26 for outputting a combination of intermediate frequency signals, 26 demodulates and decodes the intermediate frequency signal applied from the intermediate frequency combining / distributing unit 25 A channel modem for encoding and modulating a message output from the network control unit 40 to be described later and outputting the message, wherein the intermediate frequency combining / distributing unit 25 is configured for a system scalability in the case of using a plurality of channel modems It is adopted.

In the figure, reference numeral 27 denotes a frequency up-converter for converting an IF signal of 70 MHz applied from the IF combining / distributing unit 25 into a radio frequency of, for example, 14.0 to 14.5 GHz to generate an uplink frequency signal (UC: Up Converter). Reference numeral 28 denotes a high power amplifier (HPA) for amplifying an uplink frequency signal output from the frequency up converter 27.

Reference numeral 40 denotes a polling function for transmitting a control message to each base station 3 through the channel modem 26 and then checking a state of each base station 3 based on a response message transmitted from the corresponding base station If there is a call request from a specific base station, it is determined whether the other base station is capable of communicating based on the information obtained in the polling process. If the communication is available, To both base stations so that both base stations can directly perform mutual communication, and the like.

Reference numeral 50 denotes a network management system for the system manager to manage the overall network of the satellite communication system by managing the network control unit 40.

3 is a system configuration diagram showing the system configuration of the base station 3 in FIG.

3, the base station 3 includes an antenna 61 for transmitting and receiving an uplink signal and a downlink signal to and from the satellite 1 like the above-described central control station 2, A low noise amplifier 63 for low noise amplifying a downlink frequency signal of, for example, 12.25 to 12.75 GHz inputted through the orthogonal mode converter 62, an orthogonal mode converter 62 for separating and inputting a signal transmitted / A frequency down converter 64 for converting the frequency signal applied through the low noise amplifier 63 to an intermediate frequency signal IF of, for example, 70 M Hz, an intermediate frequency signal IF) to a plurality of intermediate frequency signals, an intermediate frequency combining / distributing unit 65 for combining and outputting intermediate frequency signals applied from the channel modems 68 and 69, In the distribution part 65, A frequency up converter 70 for converting an applied intermediate frequency signal of 70 MHz into a radio frequency of, for example, 14.0 to 14.5 GHz to generate an uplink frequency signal, and a frequency up converter 70, And a high-power amplifier 71 for amplifying the signal.

3, reference numeral 66 denotes a telephone data card for connecting terminals such as the telephone 12, the data terminal 13, and the facsimile 14 as shown in Fig. 1, And a trunk interface port for connecting a base station and another exchange.

Reference numeral 68 (68 _{1 to} 68n) in the drawing demodulates and decodes frequency signals from other base stations input through the above-described intermediate frequency combination / distribution unit 65, and transmits the demodulated and decoded signals through the trunk interface port 67 And is a channel modem for encoding and modulating the transmission signal from the incoming exchange and the transmission signal from the terminal input from the telephone data card 66 and outputting it.

Reference numeral 69 denotes a central control station 2 that encodes and modulates a message output from the network control unit 72 to be described later, that is, a message transmitted from the base station 3 to the central control station 2, Demodulates and outputs a message of the TDM stream transmitted from the base station.

Reference numeral 72 denotes a communication channel for the subscriber by controlling the channel modems 68 and 69 and the trunk interface port 67 and the telephone data card 66 to provide a predetermined communication channel to the subscriber, The network controller 72 and the channel modems 68 and 69, the trunk interface port 67, and the telephone data card (not shown) 66 are coupled through an UPH bus (Utility PCM Highway BUS) 73 for transmitting and receiving predetermined control data and an MPH bus (Main PCM Highway BUS) 74 for transmitting and receiving processing data such as voice data.

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

In the normal state, the network control unit 40 of the second degree performs the polling operation to check the state of each base station.

That is, the processor 41 of the network control unit 40 generates packet data for checking the status of each base station and transmits the packet data to the channel modem 26, the intermediate frequency combining / distributing unit 25, the frequency up converter 27, The amplifier 28, the orthogonal mode converter 22, and the antenna 21.

On the other hand, in the base station 3, the network control section 72 checks the use state of the channel modem 68, the abnormal state of each circuit section, and the like through the UPH bus 74, When the packet data is received through the antenna 61 and the orthogonal mode converter 62, the low noise amplifier 63, the frequency down converter 64, the intermediate frequency combination / distribution unit 65 and the channel modem 69, The channel modem 69 and the intermediate frequency combination / distribution unit 65, the frequency up converter 70, the high output amplifier 71, the orthogonal mode converter 71, And then transmitted through the antenna 61.

When data received from the base station 3 is input through the channel modem 26, the central control station 2 transmits the status data of each of the received base stations to a predetermined data memory (not shown) ), And by applying this to the network management system, the system administrator can grasp the overall operating state of the satellite communication system.

On the other hand, when a call request is made from a predetermined base station in the state of performing the above-described polling operation, the central control station 2 determines the current status of the corresponding base station based on the status data in the data memory obtained in the above- It is determined whether or not a communication modem usable in the base station is available, and it is determined whether or not the base station is in a callable state. If the communication modem is available, a predetermined communication channel is allocated to both base stations, To provide the call function.

However, the above-described satellite communication system has the following problems.

That is, in the base station of the satellite communication system, since one channel modem 68 can be allocated only to one subscriber coupled to the telephone data card 66 or the trunk interface card 67, The number of subscribers who can make simultaneous calls is determined according to the number of subscribers.

Therefore, in general, an administrator managing the satellite communication system needs to determine the number of subscribers belonging to each base station and properly set the number of the channel modem 68, that is, the call providing capability of the corresponding base station.

However, since the number of times of call execution through satellite communication is largely dependent on the tendency of the subscriber or the installation position of the base station, i.e., the installation location of the base station rather than the number of subscribers belonging to the base station, If the number of channel modems 68 of each base station is set to be constant, there exists a base station having a sufficient number of channel modems and a number of channel modems of which the number of channel modems is absolutely insufficient, depending on the base stations.

Therefore, it is necessary for the system manager to actively cope with the state of using the channel modem of each base station, that is, the usage rate of the channel modem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a channel modem use status display device which enables a system administrator to easily grasp a use state of a channel modem of each base station.

It is another object of the present invention to provide a channel modem use status display device which enables a system administrator to efficiently manage a satellite communication system by detecting a base station with insufficient number of channel modems and warning the system administrator thereof .

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

2 is a system configuration diagram showing an overall system configuration of a central control station to which the present invention is applied.

3 is a system configuration diagram illustrating an overall system configuration of a base station to which the present invention is applied.

FIG. 4 is a functional block diagram showing a configuration of the network control unit of FIG. 3 in the satellite communication system according to the first embodiment of the present invention;

FIG. 5 is a functional block diagram showing a configuration of the network management system of FIG. 2 in the satellite communication system according to the first embodiment of the present invention; FIG.

FIG. 6 is a functional block diagram showing the configuration of the network management system of FIG. 2 in the satellite communication system according to the second embodiment of the present invention; FIG.

7 is an operation flow chart for explaining the operation of the apparatus shown in Fig.

* A brief description of the main parts of the drawing

1: satellite, 2: central control station,

3: base station, 21, 61: antenna,

22, 62: orthogonal mode converter, 23, 63: low noise amplifier,

24, 64: frequency down converter,

25, 65: Intermediate frequency combination / distribution section, 26, 68, 69: Channel modem,

27, 70: Frequency up converter, 28, 71: High power amplifier,

66: Telephone data card. 67: trunk interface port,

82: Service channel controller, 83: Dual port RAM.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a channel modem use status display apparatus of a satellite communication system, comprising: counting means for counting a use time of each channel modem; And an average utilization rate of the channel modem is calculated on the basis of the time data stored in the time data storage means in a predetermined time unit, and the calculated result is output-controlled to the central control station A storage means for storing average utilization rate data of a channel modem received from the base station; an output means for outputting average utilization rate data stored in the storage means; A keyboard for controlling the output of the keyboard, And a processor for controlling the output of the average usage data, characterized in that configured by comprising a central control station is configured.

According to a second aspect of the present invention, there is provided a channel modem use status display apparatus of a satellite communication system, comprising: counting means for counting the use time of each channel modem; and means for accumulating and storing the time data counted by the counting means And a processor for calculating the average usage rate of the channel modem based on the time data stored in the time data storage means in units of a predetermined time and outputting the calculated result to a central control station A plurality of base station information storage means for storing average utilization rate data of the channel modems received from each base station, output means for outputting an expansion request message of the channel modem, If it is determined that the number of the base stations is equal to or greater than the predetermined value, And a processor for controlling the output means to execute a channel modem extension request to the base station when the average value is equal to or more than a predetermined value .

According to the present invention configured as described above, the system administrator can easily recognize the use state of the channel modem of each base station, and when addition of a channel modem to the base station is required, the system manager is automatically alerted to the system manager It is possible to efficiently manage the satellite communication system.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

4 and 5 are diagrams showing a channel modem use status display apparatus of a satellite communication system according to an embodiment of the present invention. FIG. 4 shows a functional configuration of the network control unit 72 in the base station shown in FIG. FIG. 5 is a block diagram showing the functional configuration of the network management system in the central control station shown in FIG. 2. FIG.

In FIG. 4, reference numeral 81 denotes a processor for controlling the entire system of the base station, in particular, for checking the use state of each channel modem and controlling transmission to the central control station. Reference numeral 82 denotes a processor ALOHA message on the basis of the packet information output from the processor 81 and receives the message of the TDM (Time Division Multiplex) stream from the central control station A service channel controller (SCC) 83, and a dual port RAM 83 for transmitting and receiving data between the processor 81 and the service channel controller 82.

In the figure, reference numeral 84 is a data memory for storing the total use time of the channel modem 68, and 85 is a program memory in which an operation program of the processor 85 is stored.

Then, the reference in the reference numeral 86 is a timer unit for detecting the operating time of each channel modem 68, which in response to each channel modem 68, a timer for counting the hours of use of the channel modem (86 ₁ To 86n. Here, the timers 86 _{1 to} 86 n may be configured in hardware or in software.

The processor 81 controls the timer 86 corresponding to the corresponding channel modem 68 when the channel modem 68 is allocated to a predetermined subscriber under the control of the central control station 2 And stores the time data counted by the timer 86 in the data memory 84 when the usage of the corresponding channel modem 68 is terminated, Set.

In this case, the time data is stored in the data memory 84 by adding the newly detected time data to the time data stored in the data memory 84 before the time data is stored in the data memory 84 And stored in the total usage time of the appendage channel modem 68.

Then, the processor 81 calculates the usage rate of the channel modem 68 installed in the current base station based on the time data stored in the data memory 84 in units of a predetermined time, for example, one hour, And transmits the calculated utilization rate data to the central control station 2 via the channel modem 69, and then the data memory 84 is reset.

The following equation (1) shows the calculation formula of the utilization rate executed by the processor 81. [

The division of the use time of the channel modem in Equation (1) by (the total number of channel modems -1) takes into consideration that the channel modem 69 is used for data transmission / reception with the central control station 2 in FIG.

3, the network control unit 72 calculates the channel modem usage rate of the corresponding base station 3, for example, in units of one hour, and sends out the channel modem usage rate to the central control station 2.

FIG. 5 is a block diagram schematically showing the configuration of the network management system in FIG. 2. In FIG. 5, reference numeral 51 denotes data applied from the network control unit 40 of the central control station 2, 52 is a keyboard for the system manager to execute the control processing for the satellite communication system, 53 is a data storage for storing the usage rate of the channel modem received from the central control station 2 or the base station 3 A monitor 54 for displaying the operation status, and 54 a printer for printing and outputting various processing data related to the satellite communication system.

Next, the operation of the apparatus having the above-described configuration will be described.

4 allocates the channel modem 69 to a predetermined subscriber according to the control from the central control station 2, the processor 81 of the base station 3 first transmits a timer 86 (corresponding to the corresponding channel modem) To count the use time of the channel modem 69. [ This time count is executed until a message instructing the release of the call from the central control station 2 is received.

Then, when the use time of the predetermined channel modem 69 is counted by the above operation, the count value is added to the data memory 84 and registered.

On the other hand, when the counting operation time reaches a predetermined time, that is, one hour, the processor 81 reads the count value stored in the data memory 84, Operation is performed to calculate the usage rate of the channel modem.

The processor 81 transmits the calculated utilization rate data to the central control station 2 via the channel modem 69 and resets the data memory 84 and again transmits the channel modem usage time The detection operation is performed.

Then, in the central control station 2, when the above-mentioned utilization rate data is input from each base station 2, the network control unit 40 transmits the usage rate data to the network management system 50, 5) stores the utilization rate data input from the network control unit 40 in the data storage unit 51 together with the corresponding base station number, data generation date, and data generation time.

Therefore, the channel modem usage rate data of each base station 2 is sequentially stored in the data storage unit 51. FIG.

The processor 55 controls the operation of the channel modem 51 of each base station 3 stored in the data storage unit 51. In this case, And the usage rate data is output through the monitor 53 or the printer 54. [

Therefore, in the above embodiment, the system administrator can grasp the channel modem use status of each base station 3 through the keyboard operation of the network management system 50, thereby enabling to efficiently manage the satellite communication system.

However, in the above embodiment, the system administrator determines the use state of the channel modem at each base station based on the data output through the monitor 53 or the printer 54, It can not be judged, and it can not quickly respond to a serious shortage of the channel modem.

FIG. 6 is a diagram illustrating a channel modem use status display apparatus of a satellite communication system according to a second embodiment of the present invention, which shows the configuration of the network management system 50 in FIG. 6 are denoted by the same reference numerals, and a detailed description thereof will be omitted.

In FIG. 6, a base station information storage unit 90 is provided corresponding to each base station 3. The base station information storage unit 90 stores base station information such as the number of channel modems installed in the base station, usage rate data of the channel modem transmitted from the base station, and data creation date.

The processor 55 determines the channel modem use status of each base station based on the utilization rate data stored in the base station information storage unit 90 and displays the base station requiring the addition of the channel modem on the monitor 53 do.

Next, the above-described operation will be described in more detail with reference to the operation flow chart shown in Fig.

When the base station information is input from the network control unit 40 (ST1 step), the processor 55 determines whether the utilization rate data to be preferentially applied is 80% or more (ST2 step).

If the usage rate is less than 80% in step ST2, the input base station information is stored in the corresponding base station information storage unit 90 (ST3). If the usage rate is 80% or more, The utilization rate data is read from the base station information storage unit 90 and the average utilization rate for 10 days is calculated (ST4).

If the average utilization rate in the last 10 days is 80% or more as a result of the determination in ST4, the processor 55 transmits a channel modem extension request to the monitor 53 indicating that it is necessary to add a channel modem to the base station (ST6). If it is determined in step ST5 that the average usage rate is less than 80%, the mobile station proceeds to step ST3 and stores the input base station information in the corresponding base station information storage unit 90, .

Therefore, in the above-described embodiment, the channel modem use status of each base station is automatically checked, and the status of the channel modem is automatically displayed to the system administrator. Thus, the satellite communication system can be more effectively managed.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the technical scope of the present invention.

That is, in the above configuration, the average rate of use of the channel modem is calculated and transmitted by the base station. However, the base station simply detects and outputs the use time of the channel modem and calculates the channel modem usage rate of the corresponding base station in the central control station You may.

As described above, according to the present invention, the system manager can easily recognize the use state of the channel modem of each base station, and when addition of a channel modem to the base station is required, the system manager is automatically alerted to the system manager The satellite communication system can be efficiently managed.

Claims (2)

Time data storage means for accumulating and storing the time data counted by the counting means and time data storing means for storing the time stored in the time data storing means in a predetermined time unit, A base station configured to calculate an average usage rate of the channel modem based on the data and to control output of the calculated result to a central control station; A storage means for storing average utilization rate data of the channel modem received from the base station; an output means for outputting the average utilization rate data stored in the storage means; a keyboard for controlling the output of the average utilization rate data; And a central control unit configured to control the output of the average utilization rate data according to an input signal from the keyboard. Time data storage means for accumulating and storing the time data counted by the counting means and time data storing means for storing the time data stored in the time data storing means on a predetermined time unit basis, And a processor for calculating the average usage rate of the channel modem based on the channel usage information and outputting the calculated result to a central control station, A plurality of base station information storage means for respectively storing average utilization rate data of the channel modems received from the respective base stations; output means for outputting an expansion request message of the channel modem; A processor for executing the channel modem extension request to the base station by controlling the output means when the average value is greater than or equal to a predetermined value, And a central control station configured to transmit the channel modem status information to the satellite communication system.