KR19980069607A - How to call own number in satellite communication system - Google Patents

Abstract

The present invention relates to a method for calling a own number in a satellite communication system that allows a subscriber to test his / her own number calling function by inputting only his / her own phone number using his own phone. A satellite communication system for providing a communication function between subscribers by combining via a satellite; When the off-hook signal is received, the subscriber transmits a dial tone to the calling subscriber and retrieves and recognizes the subscriber subscriber's subscriber number, and receives the subscriber number waiting for the subscriber number received from the calling subscriber. Waiting step, the subscriber number comparison step of comparing the received subscriber number and the search subscriber number when the reception of the subscriber number is completed, and if both subscriber numbers match, sending a predetermined confirmation sound to the subscriber Confirmation sound sending step, when the on-hook signal is received from the calling party, the ringing sound sending step of sending a ringing tone to the subscriber, and when the off-hook signal is received from the calling party, the guide message for the own number call request. Characterized in that it comprises a step for sending the announcement message sent out do.

Description

How to call own 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 of calling a magnetic number in a satellite communication system that enables a subscriber to test his / her own number calling function by inputting only his / her own phone number using his own telephone.

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 block diagram showing the overall system 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, the central control station 2 transmits a control message through the service channel S and then communicates the state of each base station 3 based on a response message transmitted from the base station 3. It performs a polling function to check the available capacity or the utilization status of 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 which has been provided to both base stations 3A and 3B is released.

Meanwhile, when the polling message is received from the central control station 2 through the service channel S, the base station 3 transmits a response message accordingly to the central control station 2. Then, when a predetermined call request signal is generated from the subscriber, it is reported to the central control station 2 so that direct communication is performed between the subscribers based on the communication channel and communication modem allocated from the central control station 2, When a call termination signal is generated from the subscriber, it is reported to the central control station 2, and when a predetermined call cancellation message is received from the central control station 2, the call of the subscriber is released.

In addition, the base station 3 provides a self number calling function that allows the subscriber to test the own number calling function for his telephone. That is, when a subscriber enters his / her own telephone number service code (eg, 111) and his / her telephone number by using his / her telephone, the subscriber generates his / her own voice by generating a ring tone to the subscriber side after on-hook. It provides a number calling function.

However, the self number calling function is provided with a self number calling service when the subscriber simultaneously inputs his own number calling service code and his phone number as described above, and the subscriber must know the own number calling service code. There is a problem that can not be used without.

Thus, the present invention was created in view of the above circumstances, even if the subscriber does not know the special self-numbered call service code, if you enter only their own phone number using their own phone to test the self-numbered call function The purpose of the present invention is to provide a method of calling a magnetic number in a satellite communication system.

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

2 is a block diagram illustrating a method of calling a magnetic number in a satellite communication system according to an embodiment of the present invention.

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

4 is a flowchart illustrating a method for calling a own number 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: Public switched network

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: base station control unit

31: Processor 32: Service Channel Controller (SCC)

33: Dual Port RAM 34: Program Storage

35: EN-DN information storage unit 36: search DN information storage unit

37: Receive DN information storage unit 38: Information message storage unit

40: Telephony Data Card (TDC) 50: Trunk Interface Port (TIP)

In the satellite communication system according to the present invention for achieving the above object is a satellite communication system for providing a communication function between subscribers by combining a plurality of base stations respectively coupled to a plurality of subscribers via satellite; When the off-hook signal is received, the subscriber transmits a dial tone to the calling subscriber and retrieves and recognizes the subscriber subscriber's subscriber number, and receives the subscriber number waiting for the subscriber number received from the calling subscriber. Waiting step, the subscriber number comparison step of comparing the received subscriber number and the search subscriber number when the reception of the subscriber number is completed, and if both subscriber numbers match, sending a predetermined confirmation sound to the subscriber Confirmation sound sending step, when the on-hook signal is received from the calling party, the ringing sound sending step of sending a ringing tone to the subscriber, and when the off-hook signal is received from the calling party, the guide message for the own number call request. Characterized in that it comprises a step for sending the announcement message sent out do.

That is, according to the above, the subscriber can easily test the own number calling function without knowing the predetermined own number calling service code in order to test the own number calling function.

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

2 is a block diagram of a base station 3 for explaining a method of calling a magnetic number in a satellite communication system according to an embodiment of the present invention.

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 signal of 70 MHz applied from an IF combination distribution unit 23 to be described later. Is an upconverter for generating an uplink frequency signal by converting the microwave into a microwave of 14.0 to 14.5GHz, and an uplink frequency signal output from the frequency upconverter. 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. An IF combiner divider (Combiner / Distributer) for combining and outputting the intermediate frequency signal, 24 is a base station control unit to demodulate and decode and output the intermediate frequency signal applied from the IF combination divider 23, which will be described later SCPC channel unit that encodes, modulates and outputs the message output from (30).

Here, the IF combination distribution unit 23 is adopted for system scalability when using a plurality of SCPC channel units 24.

In addition, reference numeral 30 indicates a call request from the subscriber to the central control station 2 to perform communication between the subscribers based on the communication channel and communication modem allocated from the central control station 2. As the base station control unit to control, it is to control to output a predetermined message indicating that the subscriber is performing a self-numbering call service, in addition to generating a predetermined ringing tone to the subscriber, especially when the self-number is called from any subscriber, 40 is a telephone data card for connecting multiple analog or data subscribers at the same time, and 50 is a trunk interface port for connecting to a public switched network (PSTN) of a ground network.

The reference MPH (Main PCM Highway) is a data bus through which information data such as a voice signal or a data signal is transmitted and received, and the UPH (Utility PCM Highway) is a control bus through which control data is transmitted and received between the base station controller 30 and each device. to be.

The base station 3 having the above-described configuration transmits and receives a control message with the central control station 2, and when a call request signal is received from the subscriber, reports the signal to the central control station 2 and then allocates a communication channel and communication. It provides communication function between subscribers based on modem. Here, the downlink frequency signal received from the central control station 2 through the satellite 1 to the antenna 21 is applied to the SCPC channel unit 24 through the RF processor 22 and the IF combination distributor 23. After being demodulated and decoded, the base station controller 30 is applied to the base station controller 30. When the message is transmitted, the base station controller 30 generates a TDM stream message and outputs it to the SCPC channel unit 24. The TDM message is encoded. After the modulation, the signal is converted into an uplink frequency signal and output to the satellite 1 via the antenna 21.

And, the base station (3) provides a self-numbering call service function when the same subscriber number is input from the subscriber generating the call request signal.

Next, an embodiment according to the present invention will be described in more detail with reference to FIGS. 3 and 4.

3 is a block diagram showing the configuration of the base station controller 30. In the drawing, reference numeral 31 is a processor for controlling the entire system, and 32 is a packet information extracted from a message applied from the SCPC channel unit 24. In addition to generating an S-ALOHA packet, a service channel controller for generating and outputting a message of a TDM stream to the SCPC channel unit 24.

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.

In addition, reference numeral 34 denotes a program storage unit in which an operation program of the processor 31 is stored, and 35 denotes, for example, a subscriber corresponding to a unique line number of a plurality of subscribers connected to the telephone data card 40. Save EN (Equipment Number) -DN (Directory Number) information that stores a series of subscriber information such as number registration, subscriber number (DN), subscriber type (regular phone, public phone, etc.), call restriction level, call suspension status 36 and 37 are information storage units for storing a predetermined subscriber number according to the control signal of the processor 31, and searches for the subscriber number recognized after the EN-DN information storage unit 35 is searched. A DN information storage section 36 and a reception DN information storage section 37 input from a subscriber for providing a self-numbering calling service function are shown.

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

When the off-hook signal is detected from a certain subscriber, the telephone data card 40 immediately reports the subscriber's device number (EN) to the processor 31. At this time, the processor 31 transmits the telephone data card ( In addition to transmitting the dial tone to the calling party through step 40, the subscriber information stored in the EN-DN information storage unit 35 is searched based on the subscriber's device number (EN) ( ST3 step).

Then, the processor 31 recognizes the subscriber number (DN) corresponding to the subscriber's device number (EN) and controls to store it in the search DN information storage unit 36 (step ST4).

On the other hand, the telephone data card 40 transmits a dial tone to the subscriber and waits for a predetermined digit signal input from the subscriber. When the digit signal is received from the subscriber, the telephone data card 40 outputs it to the processor 31 in real time. . Then, the processor 31 sequentially stores the digit signal received from the telephone data card 40 in the reception DN information storage unit 37. When the reception of the digit is completed (step ST5), the processor 31 determines whether or not the data stored in the reception DN information storage unit 37 is normal (step ST6). If not, the subscriber will transmit a ring tone through the telephone data card 40 (step ST7).

On the other hand, when the reception digit becomes normal in step ST6, the processor 31 stores the reception digit stored in the reception DN information storage 37 and the subscriber information stored in the search DN information storage 36. It is determined whether they match (step ST8).

At this time, when both data stored in the search DN information storage unit 36 and the reception DN information storage unit 37 do not match, a predetermined call request including a subscriber number (DN) is sent to the central control station (2). General call processing such as outputting a signal is performed (step ST9). However, if both data match in step ST8, a predetermined confirmation tone is transmitted to the subscriber (step ST10).

After that, when the predetermined on-hook signal is received from the subscriber through the telephone data card 40 (step ST11), the processor 31 outputs a predetermined call signal different from the general call signal to the subscriber (step ST12). ).

Subsequently, when the off-hook signal is received from the subscriber (step ST13), the processor 31 reads a series of guide messages from the guide message storage unit 38 and outputs a guide broadcast for the own number calling service to the subscriber. Control (ST14 step).

Then, the processor 31 releases the call when the on-hook signal is received from the subscriber.

Therefore, according to the above embodiment, the subscriber can easily test the own number calling function by inputting only his own subscriber number using his phone to test the own number calling function.

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, even if the subscriber is not familiar with the special self-numbered call service code, the satellite communication system enables the self-numbered call function to be tested by inputting only his / her own phone number using his own phone. It is possible to realize how to call own number.

Claims (1)

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; A search subscriber number recognition step of transmitting a dial tone to the calling subscriber and retrieving and recognizing the subscriber number of the calling subscriber when the off-hook signal is received; A subscriber number reception waiting step of waiting for a subscriber number received from the subscriber; A subscriber number comparison step of comparing and determining whether the received subscriber number and the search subscriber number are identical when reception of the subscriber number is completed; A confirmation tone transmission step of transmitting a predetermined confirmation tone to the calling party when both subscriber numbers match; A ring tone sending step of sending a ring tone to the subscriber when an on-hook signal is received from the calling subscriber; And a guide message sending step of sending a guide message for a call request of a number when an off-hook signal is received from the calling subscriber.