KR19980041443A - Voice Call Service Method in Satellite Communication System - Google Patents

Abstract

The present invention relates to a voice call method for an incoming call in a satellite communication system in which information of a subscriber is stored in a call generated during a call or absence, and then serviced by voice.

The present invention provides a reception call subscriber search step of searching whether a target called subscriber is registered as a reception call service subscriber when an incoming call is requested from any subscriber; and the information of the call subscriber when the target called subscriber becomes a reception call service subscriber. Through the received call processing step of storing the received call information.

And, if the reception call subscriber is off-hook, the reception call search step for searching whether the reception call exists, and if the reception call exists, outputs a predetermined call reception tone to the reception call subscriber and then inputs the reception call confirmation request signal. Receiving call confirmation request signal searching step, when receiving call confirmation request signal is inputted, voice service performing step of generating and outputting voice synthesis signal based on the received call information, receiving call connection request signal after outputting voice synthesis signal The voice call service is provided through the reception call connection request signal search step of searching whether the input signal is input and the reception call call processing step of performing call processing with the reception call when the reception call connection request signal is input.

Description

Voice Call Service Method 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 voice call method for a received call in a satellite communication system in which information of a subscriber is stored in a call generated during a call or absence, and then serviced by voice.

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 above-mentioned satellite communication, a pre-assignment multiple access (PAMA) method of allocating communication channels for each subscriber before a predetermined time according to the channel assignment method, and a DAMA (Demand Assignment Multiple) for allocating communication channels according to a subscriber's request. Access). In general, the DAMA method is used for voice communication and the PAMA method is used for data communication in consideration of the price 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.

In the above-described configuration, the central control station 2 transmits a control message through a service channel in a normal state and then, based on a response message sent from the base station 3, that is, communication 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.

On the other hand, the base station 3 coupled with the subscriber sends a response message for the polling message to the central control station 2 when, for example, a polling message for the operation state of the base station 3 is received from the central control station 2. In addition, when a call request is received from the subscriber, a series of S-ALOHA packets including a call request message is generated and sent.

Then, when a message such as an available communication channel, a modem, etc. is received from the central control station 2, a communication between subscribers is provided based on this.

2 is a block diagram showing the configuration of the base station 3 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. Orthogonal Mode Transducer (OMT) for separating and inputting a separate signal, and Low Noise Amplifier (LNA) for low-noise amplifying downlink frequency signals of 12.25 to 12.75 GHz inputted through the Orthogonal Mode Converter. ), A frequency down converter (DC) for converting a frequency signal applied through this low noise amplifier into, for example, an intermediate frequency signal (IF) of 70 MHz, and applied from an IF combination / distributor 23 to be described later. A frequency upconverter (UC) for converting a 70 MHz IF signal into a microwave of 14.0 to 14.5 GHz to generate an uplink frequency signal, and an uplink output from the frequency upconverter An RF processor configured to include: (High Power Amplifier HPA) high-power amplifier for amplifying the frequency signals.

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 combination divider (Combiner / Distributer) for combining and outputting the intermediate frequency signal, 24 is demodulated, decoded and output the intermediate frequency signal applied from the IF combination divider 23, the base station control unit to 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.

Reference numeral 30 denotes a base station controller for controlling communication between subscribers when there is a call request from a subscriber, 31 denotes an incoming call memory for storing a telephone subscriber's telephone number, and 32 a subscriber off the telephone. When hooked (Off-Hook), it is a service subscriber memory for storing the information of the service subscriber who is provided with the reception call service function, which is able to immediately connect with the call subscriber who generated the call during or during a call.

In addition, reference numeral 40 is a board directly connected to a subscriber, and is a telephone data interface card (telephone data interface card) for connecting a plurality of analog subscribers and data subscribers, and 50 is a trunk interface for performing a connection function with a public switched network of a terrestrial network. It is a port (Trunk Interface Port).

The reference code 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.

That is, in the above-described configuration, the base station controller 30 periodically searches for the state of the entire device and stores the state information in a predetermined memory, which is periodically polled from the central station 2. Upon receipt of the signal, a series of S-ALOHA messages are generated based on the status information and controlled to be output to the central control station 2. In addition, when a call request is received from the subscriber, it is reported to the central control station (2) and then provides the calling function of both subscribers through the SCPC channel unit 24 allocated from the central control station (2).

In addition, the base station control unit 30 stores the reception call service registration subscriber in the service subscriber memory 32. Thus, when a call request is made to a certain subscriber, first, the subscriber data of the service subscriber memory 32 is searched for whether the subscriber is a call subscriber, and when the call subscriber is a call receiver, the call reception service is provided. .

That is, if the call subscriber is busy or absent, the call subscriber stores the telephone number and the call time of the call subscriber in the reception call memory 31, and then, if the subscriber goes off-hook, the subscriber receives a call. You will be notified by the output sound. Then, when the subscriber inputs a predetermined connection request signal, the call processing is performed immediately without informing the call subscriber information (telephone number).

However, as described above, the conventional reception call service function immediately performs call processing without informing the reception subscriber of the call subscriber, which is, for example, for the subscriber when the reception call subscriber is busy or absent. If the reception call is established, there is a disadvantage in that the reception call subscriber preferentially receives a call regardless of who the call subscriber is when he / she is off-hook for the call.

That is, by the intention of the called party, the called party stores (receives) the telephone number received during the call or missed, and then informs the called party of the received time and telephone number to provide sufficient information to the called party. There is a need for a function that allows the connection of the desired call.

Accordingly, the present invention was created in view of the above circumstances, and stores the telephone subscriber's telephone number and the calling time in a call that occurred during or during the receiving call subscriber's call. The purpose of the present invention is to provide a voice call method for a received call in a satellite communication system that provides a voice service.

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 base station 3 in FIG.

3 is a flowchart illustrating a method for receiving call number information in a conventional satellite communication system.

4 is a flowchart illustrating a method for receiving call number information 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 30, 60: base station control unit

31, 62: Reception call memory 32: Service subscriber memory

40: telephone data card (TDC) 50: trunk interface port (TIP)

61: speech synthesis processing unit

In the satellite communication system according to the present invention for achieving the above object, the received call voice service method comprises: a satellite communication system providing a communication function to a subscriber by connecting a plurality of base stations respectively coupled to a plurality of subscribers through a satellite; Receiving call subscriber search step for retrieving whether a target called party is registered as a receiving call service subscriber upon request of an incoming call from any subscriber, and storing the information of the calling subscriber when the target called subscriber becomes a receiving call service subscriber. The reception call information is stored through the reception call processing step.

And, if the reception call subscriber is off-hook, the reception call search step for searching whether the reception call exists, and if the reception call exists, outputs a predetermined call reception tone to the reception call subscriber and then inputs the reception call confirmation request signal. Receiving call confirmation request signal searching step, when receiving call confirmation request signal is inputted, voice service performing step of generating and outputting voice synthesis signal based on the received call information, receiving call connection request signal after outputting voice synthesis signal A voice call service is provided for the received call information through the received call connection request signal retrieval step for retrieving whether a call is input and the received call call processing step for performing call processing with the corresponding received call. .

That is, according to the above, it is possible to store the information of the called subscriber who attempted the call to the called party, and then, if desired, the called party can service the calling party's information by voice.

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

FIG. 3 is a block diagram for explaining a received call voice service method in hardware in a satellite communication system according to an embodiment of the present invention. In FIG. The detailed description is omitted.

In the drawing, reference numeral 60 denotes a base station controller for performing overall control of the base station, 61 denotes a voice synthesis processor for converting and outputting a predetermined signal based on a control signal of the base station controller 60, and 62 It is a reception call memory for storing a telephone subscriber's telephone number and a call time (a time when a call is received).

That is, in the above configuration, the base station control unit 60 stores the telephone number and call time of the called subscriber in the reception call memory 62 when there is a call request when the reception call subscriber is busy or absent. To control. Subsequently, when the subscriber who receives the reception call wants to provide the reception call information, the voice synthesis processing unit 61 is driven and controlled to output the reception call information to the reception call subscriber based on the reception call information of the reception call memory 62. Done.

Next, the reception call voice service method in the satellite communication system according to an embodiment of the present invention will be described with reference to the flowcharts of FIGS. 4 and 5.

First, referring to the flowchart of FIG. 4, a process of storing the called party subscriber's information during the busy or absent call of the incoming call subscriber will be described.

When an incoming request signal for any subscriber is received (step ST401), the base station controller 60 searches for the status of the called subscriber (step ST402). At this time, when the incoming subscriber is in a call, first, it is searched whether the incoming subscriber is a reception call subscriber (step ST403). If the reception subscriber is not a reception call subscriber, the base station controller 60 controls general call processing (step ST404). ).

On the other hand, when the reception call subscriber, the base station control unit 60 is to search whether the incoming subscriber is busy (ST405), when the call is controlled to store the calling party's telephone number and call time in the reception call memory In addition to sending a busy tone to the calling party (step ST406), the general call processing is then controlled (step ST407).

On the other hand, when the incoming subscriber is not busy in step ST405, the ringback tone signal and ring signal are output to the calling subscriber and the called party, respectively (step ST408).

Subsequently, the base station controller 60 searches whether the off-hook signal is input from the called party (step ST409). If the called party is off-hook, the base station controller 60 performs a normal call processing by setting a call (step ST410). ). Meanwhile, the base station controller 60 checks the output frequency of the ring signal while outputting the ring signal to the called party (ST411). When the output frequency of the ring signal exceeds a certain number, the telephone number and call of the call subscriber are called. The time is stored in the reception call memory 62 (step ST412). Subsequently, the control unit stops the output of the ring signal and the ring back tone signal (step ST412), and outputs a predetermined call release message to the calling party and ends (step ST413).

That is, according to the above, if the call request signal is received when the reception call subscriber is busy or busy, the telephone number and call time of the call subscriber are stored.

Next, with reference to Figure 5 will be described a method of voice service the information of the call subscriber in accordance with the request of the reception call subscriber.

First, when a subscriber picks up the handset (off-hook) to attempt a call (ST501 step), the base station controller 60 searches whether the subscriber is a called service subscriber based on the service subscriber memory 32. (ST502 step).

At this time, if the call request subscriber is not the reception call subscriber, the base station controller 60 controls to perform a normal call processing operation based on, for example, the subscriber's dialing signal (step ST503). However, if the call request subscriber is a reception call subscriber, it is searched whether there is a reception call for the reception call subscriber based on the reception call memory 62 (step ST504). At this time, if there is no reception call for the called party, the process proceeds to step ST503 to control normal call processing, but if there is an incoming call, a predetermined call reception sound is sent to the called party (ST505). .

Subsequently, the base station controller 60 waits for a reception call confirmation request signal from the reception call subscriber for a predetermined time (step ST506), and when a predetermined reception call confirmation request signal is input, The voice synthesis processor 61 is controlled based on the received call data to generate and output a predetermined voice signal to the received call subscriber (step ST507).

Subsequently, the base station controller 60 searches whether the predetermined call connection request signal is inputted from the received call subscriber for a predetermined time (step ST508). At this time, the predetermined call receipt is received from the received call subscriber until the predetermined time elapses. If the call connection request signal is not input, the control unit deletes the received call information of the call subscriber and then proceeds to step ST504 to control to repeat the following operations (step ST509).

However, when the reception call connection request signal is input in step ST508, the base station controller 60 controls to output a predetermined dialing signal to the subscriber based on the reception call data (step ST510). Control to delete the corresponding call number information in the memory 62 (step ST511). After that, the base station controller 60 controls the normal call processing operation (step ST512).

On the other hand, when a predetermined reception call confirmation request signal is not input until a predetermined time has elapsed in step ST506, the base station controller 60 deletes all reception call data stored in the reception call memory 62. Control is made (step ST513).

Thereafter, the base station controller 60 proceeds to step ST512 to perform control of performing normal call processing.

Therefore, according to the above, when the receiving call subscriber receives a call request from any subscriber during the busy or missed call, the information of the calling subscriber is stored, and when the receiving call subscriber is off-hook, the presence of the receiving call is determined. It will output the incoming call. When the reception call subscriber receives a predetermined reception call confirmation request signal, the reception call subscriber outputs the reception call with a predetermined voice. Subsequently, when a predetermined call reception request signal is input, the reception call function is provided to dial the received call information and communicate with the subscriber who has received the call.

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, the receiving call subscriber stores the information on the calling party in the call that occurred during or during the call, and then provides the call time and the telephone number by voice for the receiving call desired by the receiving call subscriber. In addition, it is possible to realize the voice call method of the received call in the satellite communication system to perform the call processing immediately.

Claims (4)

A satellite communication system for providing a communication function to a subscriber by connecting a plurality of base stations respectively coupled to a plurality of subscribers via satellites; An incoming call subscriber search step of searching whether a target incoming subscriber is registered as a receiving call service subscriber upon request of an incoming call from any subscriber; Receiving call voice service method in the satellite communication system, characterized in that it comprises a reception call processing step of storing the information of the call subscriber when the target incoming subscriber becomes the reception call service subscriber. The method of claim 1, And a normal call processing step of performing normal call processing if the target called party subscriber is not a reception call subscriber in the reception call subscriber search step. A satellite communication system for providing a communication function to a subscriber by connecting a plurality of base stations respectively coupled to a plurality of subscribers via satellites; Reception call search step for retrieving whether there is a reception call when the subscriber of the reception call is off-hook, A reception call confirmation request signal retrieval step of retrieving whether a reception call confirmation request signal is input after outputting a predetermined call reception tone to the reception call subscriber when the reception call exists; Performing a voice service for generating and outputting a speech synthesis signal based on the reception call information when the reception call confirmation request signal is input; A reception call connection request signal retrieval step of retrieving whether a reception call connection request signal is input after outputting a voice synthesis signal; The reception call voice service method of the satellite communication system comprising a reception call call processing step of performing a call processing with the reception call when the reception call connection request signal is input. The method of claim 3, When the reception call confirmation signal is not input for a predetermined time in the reception call confirmation request signal search step, the reception call information deletion step of deleting all the reception call information and performs a normal call processing, characterized in that configured to include Reception call voice service method in communication system.