KR100250619B1 - Other terminal operating apparatus of satellite communication system - Google Patents

Abstract

PURPOSE: An order line terminal operation device of satellite communication system is provided to have a general subscriber's call function so that a call can be made by general subscribers to the order line terminal operation device. CONSTITUTION: A satellite communication system has base stations connected with multiple subscribers and a central control station, which controls available communication channels for base stations having call requests. A base station information storage unit stores order line subscribers' call numbers registered by an operator of the central control station. A processor manages call establishments of the base stations in accordance with the order line subscriber information stored in the base station information storage unit. A controller(370) controls calls for order line subscribers in accordance with commands of the central control unit. A tone generation unit generates a ring signal and a tone signal. A time switching unit(376) switches a call sound generated from the tone generation unit to order line terminal. A digital to analog converter(378h) converts a digital call sound from the time switching unit(376) to analog signal. An amplifier(378i) amplifies audio sound from the digital to analog converter(378h) to a certain level. A switching unit(378j) sends call signals to order line terminals by supervising the signal periodically in accordance with the controller(370).

Description

Other Short Line Terminal Operating System of Satellite Communication System

The present invention relates to a satellite communication system, and in particular, the terminal number is assigned to the other line operator terminal, and the inside of the terminal is provided with a ring tone output function for a call of any subscriber, so that any time a subscriber is required, the other line operator terminal is called. The present invention relates to a rudder wire terminal operating apparatus of a satellite communication system that allows a user to make a call.

The communication service provided by the satellite communication system includes not only the earth stations under the earth with uplink and downlink transmission / reception facilities with satellites, but also the subscribers of the ground network (PSTN) connected to each earth station. The reason for providing such a wide area communication service is that each earth station of the satellite communication network has a trunk interface port (TIP) capable of matching ground subscribers therein. Because it is built.

On the other hand, Figure 1 is a block diagram showing the configuration of a base station of a general satellite communication system equipped with a terrestrial subscriber trunk receiving function, reference numeral 21 in Figure 1 is an uplink (uplink) signal and the downlink (link) for the satellite (1) (Down link) is an antenna for transmitting and receiving signals, 22 is an orthogonal mode transducer (OMT: 23) to separate and input and receive signals transmitted and received through the antenna 22 using the polarization property of the frequency, A low noise amplifier (LNA: Low Noise Amplifier) for low-noise amplifying downlink frequency signals of 12.25 to 12.75 GHz, input through the orthogonal mode converter 22, 24 applies the frequency signals applied through the low noise amplifier 23. For example, it is a frequency down converter (DC) which converts an intermediate frequency signal IF of 70 MHz.

In addition, reference numeral 25 separates and outputs the intermediate frequency signal IF applied from the frequency down converter 24 into a plurality of intermediate frequency signals, and also describes a Single Channel Per Carrier (SCP) channel unit to be described later. Intermediate frequency combiner / distributor (IF C / D: IF Combiner / Distributer) for combining and outputting the intermediate frequency signal applied from SCU: 61, and 61 (61 _{1 to} 61 ₃₂ ) are the intermediate frequency combiner / distributor. An SCPC channel unit 61 which demodulates, decodes and outputs an intermediate frequency signal applied from (25), or vice versa, which encodes and modulates a transmission signal to be transmitted to a central control station or another base station. This is for transmitting and receiving signals to and from a station or other station.

In addition, reference numeral 27 is a trunk interface port (Trunk Interface Port) for connecting the E1 trunk module and the like of the base station and the ground network (PSTN) switch, 32 is 70 M applied from the IF combination / distribution unit 25 A frequency upconverter (UC) for converting an IF signal of 로 to an microwave of 14.0 to 14.5 GHz to generate an uplink frequency signal, 33 is an uplink frequency signal output from the frequency upconverter 32. It is a high power amplifier (HPA) that amplifies.

Reference numeral 60 denotes a telephone data card for connecting a terminal such as a telephone, a data terminal, or a facsimile, and reference numeral 63 denotes the SCPC channel unit 61, a trunk interface port 27, and telephone data. A network controller which controls the card 60 to provide a predetermined communication channel to the subscriber, and generates and outputs message data for informing the central control station of the current status of the base station; It is designed to exchange control data with the above-described SCPC channel unit (SCU) 61, trunk interface port (TIP) 27, and telephone data card (TDC) 60 through UPH (65: Utility PCM Highway). In addition, traffic data communication with each module is performed through the MPH 66: Main PCM Highway.

That is, the conventional trunk interface port (TIP) 27 having the above configuration is provided with a module for accommodating the ground network (PSTN) subscriber, so that the ground network subscriber is controlled by the network control unit 63. A data card (TDC) 60 subscriber or SCPC channel unit 61 can communicate with a subscriber of another base station.

On the other hand, the trunk interface port (TIP) is provided with a tapping board, which is a dedicated communication line between network operators for maintenance of the satellite communication network, the conventional tabbing board line with a specific earth station to be established at the time of system design Because it was limited to a 1: 1 dedicated line, the operator could not only call another subscriber but also the operator of the designated country, and conversely, he could not receive a call from any subscriber.

Therefore, when another operator located in a third region needs to contact the other terminal operator in order to maintain the system, the conventional system can directly call the other terminal operator. There was no way to respond in an urgent situation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an apparatus for operating a short-term line terminal of a satellite communication system, which allows a subscriber to directly call a short-term line connecting terminal as needed.

1 is a block diagram schematically showing a configuration of a base station in a general satellite communication system.

2 and 3 are block diagrams showing the configuration of a satellite communication system equipped with a rudder wire terminal operating function according to an embodiment of the present invention.

4 is a diagram illustrating a UPH data format for explaining a process generated by the network control unit 63 of FIG.

Explanation of symbols on the main parts of the drawings

21: antenna, 22: orthogonal mode converter,

23: low noise amplifier, 24: frequency down converter,

25: intermediate frequency combination / distribution, 27,37: trunk interface port,

32: frequency up converter, 33: high power amplifier,

60: telephone data card, 61: SCPC channel unit,

63: network control unit, 65: UPH (Utility PCM Highway),

66: MPH (Main PCM Highway), 370: Board Controller,

371: bus interface, 372: E1 trunk matching,

373: frame reconstruction unit, 374: CRC inspection unit,

375: access time adjustment unit, 376: time switching unit,

377: terminal, 378: other short-terminal terminal connection,

378a: hook detection unit, 378b: first status register,

378c: dial detection section, 378d: second status register,

378e: timer, 378f: controller,

378g: CODEC (coder-decoder), 378h: D / A converter,

378i: amplification part, 378j: switching part

The other short-term line terminal operating apparatus of the satellite communication system according to the present invention for realizing the above object is a base station having a satellite and a call request for providing a communication channel between each base station and a plurality of base stations, respectively; A satellite communication system having a central control station for assigning and controlling a usable call channel, the central control station comprising: a base station information storage unit for storing other call line subscriber call number information registered by an operator and a base station information storage unit; A processor for managing call setup for the subordinate base station based on the registered haptic subscriber information, the base station having a controller for controlling a calling function for the haptic subscriber according to a command of the central control station processor, and a predetermined ring; a tone generator for generating and outputting a ring signal and a tone signal according to the control of the controller A time switching unit for switching and switching the ring tone generated by the tone generator to the called pruning line terminal, a D / A converter for converting and outputting a digital type ring tone switched by the time switching unit to an analog signal; An amplifying unit for amplifying the audible signal converted by the D / A converter to a predetermined level, and a switching unit for interrupting the call signal output from the amplifying unit at a predetermined time period and supplying it to the other short-circuit terminal under the control of the controller. Characterized in that it is configured.

That is, according to the present invention having the above-described configuration, the terminal number is assigned to the other line operator terminal, and the inside of the terminal is provided with a call tone output function for the call of any subscriber, so that any time a subscriber is required, the other line operator terminal is called. It is possible to realize the other short-term line terminal operating device of the satellite communication system that can be called.

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

2 and 3 are block diagrams schematically showing the configuration of the central control station and the base station of the satellite communication system for explaining the operation function of the other line terminal according to an embodiment of the present invention, respectively. Like reference numerals are used to designate components that perform the same function, and detailed description thereof will be omitted.

First, in FIG. 2, reference numeral 31 denotes an antenna for transmitting and receiving an uplink signal transmitted to a satellite (not shown) and a downlink signal transmitted from a satellite, and 40 denotes an antenna ( 31) converts the downlink signal received in the ultra high frequency band into an intermediate frequency (IF) signal and simultaneously converts and outputs an intermediate frequency (IF) signal in the 70 MHz band into an RF signal in the ultra high frequency band for the uplink signal. The RF transceiver 40 is an orthogonal mode transducer (OMT) that separates and inputs and outputs up and down link signals transmitted and received through the antenna 31 using a polarization property of frequency. Amplifying the 12.25 to 12.75 GHz downlink frequency signal separated by the 41 and the orthogonal mode converter 41 to a predetermined level, and amplifying the amplified signal, for example, at 70 MHz. RF receiver 42 for converting to IF signal and 70 MHz intermediate frequency (IF) signal to be transmitted to the satellite side is converted to microwave of 14.0 ~ 14.5 GHz microwave and amplified to a predetermined level to uplink frequency signal It is composed of the RF transmitter 43 to generate.

Further, reference numeral 50 denotes an IF processing stage for processing an intermediate frequency (IF) signal of a 70 MHz band, and the IF processing stage 50 receives an intermediate frequency (IF) signal applied from the RF receiver 42. Intermediate frequency combination / distributor (IF) for separating and outputting a plurality of intermediate frequency signals and combining and outputting intermediate frequency signals applied from a single channel per carrier (SCP) channel unit (SCU) 53 to be described later. C / D) 51 and the first SCPC channel unit for demodulating, decoding and outputting the IF signal applied from the intermediate frequency combination / distributor 51 and the message output from the network controller 70 to be described later. It consists of a second SCPC channel unit 53 which is encoded, modulated and output.

In addition, reference numeral 70 transmits a control message to each base station through the SCPC channel unit 53 and performs a polling function to check the status of each base station based on a response message transmitted from the corresponding base station. If there is a call request from the base station, the base station determines whether the other base station is in a communication state based on the information obtained in the polling process, and if the communication state is available, allocates available traffic channels of the satellite to both base stations. This is a network control unit that performs system control such as allowing direct communication with each other.

On the other hand, the network controller 70 extracts packet information from the message applied from the processor 71 and the SCPC channel unit 52, which controls the entire system and in particular, the call processing between the base stations. In addition, a service channel controller (SCC) 72 for generating and outputting a message of a time division multiplex (TDM) stream to the SCPC channel unit 53, and a service with the processor 71. Dual port RAM 73 for data transmission and reception between the channel controller 72, the program storage unit 74 that stores the operating program of the processor 71, the status information of each base station obtained by the above-described polling operation The base station information storage unit 75 is stored, and the channel information storage unit 76 stores the usage state of the communication channel.

In addition, reference numeral 80 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 necessary.

First, in the device having the above-described configuration, the operator assigns a subscriber number to the other short-circuit terminal provided in the trunk interface port (TIP) of each base station, thereby registering the corresponding terminal.

The operator operates a terminal (not shown) provided in the network management system 80 of the central control station to designate a subscriber number for the other short-circuit terminal to be registered and to issue a registration command for the corresponding data. Upon input, the processor 71 stores and sets the subscriber line subscriber information input by the operator in the base station information storage unit 75 to register the subscriber line terminal as a subscriber.

Next, the other call line terminal call call function according to the present invention will be described with reference to the detailed configuration diagram of the base station shown in FIG.

In FIG. 3, reference numeral 37 denotes a trunk interface port (TIP) according to the present invention. The configuration thereof is as follows.

Reference numeral 370 denotes a board controller for controlling the operation of the trunk interface port (TIP) 37, and 371 denotes the telephone data card (TDC) 60 and the SCPC channel unit through the UPH 65 and the MPH 66. (SCU) 61 and a bus interface for communicating with the network control unit 63.

Reference numeral 372 denotes an E1 trunk matcher for matching E1 trunks of the ground network, and 373 selects control data for CRC checking from among 32 channel audio data applied through the E1 trunk matcher 372. And a frame reconstruction unit 374 for reconstructing the multiframe using only complete voice data, and 374 is a CRC inspection unit for performing CRC error checking based on the CRC check control data extracted from the frame reconstruction unit 373.

Reference numeral 375 denotes an access time adjusting unit that performs data transmission time adjustment in consideration of a change in distance between the satellite body and the earth station under control of the board controller 370, and 376 denotes a control signal from the board controller 370. Accordingly, the time switching unit 377 performing the switching operation between voice channels according to the switching function is a terminal to which the operator is connected for maintenance of the system.

On the other hand, reference numeral 378 is a haptic terminal connection portion for system connection with respect to the operator terminal 377 connected to the trunk interface port (TIP) 37, the haptic terminal connection portion 378 has a terminal 377 The hook detection unit 378a for detecting the hook on / off state, the first state register 378b for storing and setting corresponding flag data according to the hook state detected by the hook detection unit 378a, and the operator 377. A dial detection unit 378c for detecting a dial pulse DP or DTMF signal generated by operating a second state register for storing and setting flag data corresponding to the data level detected by the dial detection unit 378c ( 378d), a timer 378e for generating and outputting predetermined time data for generating an interrupt, a controller 378f for controlling the overall device of the short-circuit terminal connection unit 378, and the short-circuit terminal 377 Codec for performing D / A (digital-analog) conversion to the terminal 377 for voice data coming and going between the time switching unit 376 and A / D (analog-digital) conversion in the opposite direction. (CODEC; coder-decoder) is provided.

On the other hand, the network control unit 63 is provided with a tone generating unit (not shown) for generating various tone signals necessary for the exchange function between subscribers, including all ring including ring signals. The signal is transmitted through the MPH 66 through 17 PTBG channels of 0-16 among 32 MPH channels, as shown in FIG.

Reference numerals 378h to 378j are components for providing the ring signal and tone signal supplied through the PTBG channel to the other circuit line terminal 377, and 378h indicates a time switching unit (c) according to the control of the board controller 370. 376) is a D / A converter for converting a digital ring and tone signal that is switched and applied to an analog signal, and 378i amplifies an audible signal converted into an analog form to a predetermined level. In addition, 378j is a switching unit which controls the ring signal supplied to the other circuit line terminal 377 at regular intervals by executing a switching operation at a predetermined time period under the control of the board controller 370.

As described above, when any subscriber calls the matching line terminal 377 while the subscriber registration of the matching line terminal is completed, the processor 71 of the central control station 2 performs the call setting according to a conventional call setup procedure. The base station information storage unit 75 is indexed. When the called subscriber is identified as the other short-circuit terminal subscriber, the processor 71 of the central control station 2 allocates a call channel and the corresponding base station 3 The call control message to the network control unit 63 of the.

On the other hand, the network control unit 63 of the base station analyzes the call setup message transmitted from the central control station (2), through the UPH (65) to the board controller 370 for the other short circuit line 377 You will be informed that the call was received.

On the other hand, the board controller 370 controls the time switching unit 376 to connect the channel on which the ring signal is loaded among the 17 PTBG channels transmitted through the UPH 65 to the other terminal line connection unit 378. The switch is switched to). As a result, the digital ring signal is converted into an analog signal by the D / A converter 378h and amplified to a predetermined level by the amplifier 378i. The switching unit 378j is controlled by the board controller 370. By intermittently intermittent by a certain period by the supply line to the other line terminal 377, as a result, a ring signal that is a ring tone to the other line terminal 377 is output to the operator to receive the call of any subscriber Will be added.

That is, according to the embodiment, the terminal number is assigned to the other line operator terminal, and the inside of the terminal is provided with a call tone output function for the call of any subscriber, so that any time a subscriber is required, the user can call the other line operator terminal to make a call. It is possible to realize other short-terminal terminal operating device of the satellite communication system.

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 provide an additional communication service that allows an arbitrary subscriber to make a call by directly calling the other line connection terminal as needed.

Claims (1)

A satellite communication system having a plurality of base stations, each coupled with a plurality of subscribers, and a central control station for allocating and controlling a usable communication channel for a satellite and a base station with a call request to provide a communication channel between the base stations. The central control station includes a base station information storage unit for storing other call line subscriber call number information registered by an operator and a processor for managing call setup for subordinate base stations based on the other line subscriber information registered in the base station information storage unit. Equipped, The base station includes a controller for controlling a calling function for a subscriber line subscriber according to a command of the central control station processor, a tone generator for generating and outputting a predetermined ring signal and a tone signal, and controlling the controller. A time switching unit for switching switching the ringing tone generated by the tone generator to the called pruning line terminal, a D / A converter for converting and outputting a digital type ringing tone switched and input by the time switching unit; An amplifying unit for amplifying the audible signal converted by the D / A converter to a predetermined level, and a switching unit for interrupting the call signal output from the amplifying unit at a predetermined time period and supplying it to the other short-circuit terminal under the control of the controller. Other terminal line operating device of the satellite communication system, characterized in that the configuration.

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