KR100226603B1 - Communication limited method for bad user in satellite communication - Google Patents

Abstract

The present invention relates to a method for rejecting bad user communication in a satellite communication system that is capable of blocking a bad user who wants to receive a service by accessing the satellite communication system. A satellite communication system for providing a communication function to the; When a call request signal is received from a third-party network, the calling party digit storing step of storing the called party digit, the calling party information requesting step requesting the calling party's information, and when the calling party information is received, the calling party subscriber is a bad subscriber. And a call setup impossibility message output step of outputting a predetermined call setup impossibility message to the calling party when the originating subscriber becomes a poor subscription.

Description

Rejection of bad user communication in satellite communication system

The present invention relates to a communication system using satellites, and more particularly, to a method for rejecting bad user communication in a satellite communication system that is capable of blocking a bad user who wants to receive a service by accessing the satellite communication system.

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.

On the other hand, the base station 3 is interfaced with the public switched network through a predetermined subscriber matching device (eg, trunk interface port) to accommodate a plurality of public switched network subscribers.

In this regard, in view of the current trend of increasing number of satellite communication service providers, it is necessary to fundamentally block some rogue users who are expected to provide services through multiple networks.

Accordingly, the present invention was created in view of the above circumstances, and when a subscriber connected to a third-party network shows a behavior such as unpaid charges while using the service by accessing the satellite communication system, the subscriber receives a predetermined memory from the own network. The purpose of the present invention is to provide a method for rejecting bad user communication in a satellite communication system that allows users to select and provide services by automatically rejecting call processing of a corresponding subscriber.

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

Figure 2 is a block diagram for explaining the hardware of the bad user communication rejection method in the satellite communication system according to an embodiment of the present invention.

Figure 3 is a flow chart for explaining a bad user communication rejection method in a satellite communication system according to an embodiment of the present invention.

Brief description of the main parts of the drawing

1: satellite 2: central control station

3A, 3B: Base station 11A, 11B: 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: base station control unit

31: program storage unit 32: system state information storage unit

33: subscriber information storage unit 34: bad subscriber number storage unit

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

In the satellite communication system according to the present invention for achieving the above object, the block user communication rejection method includes a satellite communication system providing a communication function to a subscriber having a plurality of base stations coupled with a plurality of subscribers, respectively; When a call request signal is received from a third-party network, the calling party digit storing step of storing the called party digit, the calling party information requesting step requesting the calling party's information, and when the calling party information is received, the calling party subscriber is a bad subscriber. And a call setup impossibility message output step of outputting a predetermined call setup impossibility message to the calling party when the originating subscriber becomes a poor subscription.

That is, according to the above, by limiting the call required from the bad user who wants to receive the service by connecting to the company network, it is possible to improve the call processing of other users.

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 in hardware the method for rejecting bad user communication 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. 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.

Further, reference numeral 30 denotes a base station controller which controls communication between subscribers when there is a call request from the subscriber and, when necessary, controls to request information transmission to the calling party to the calling party, and 31 denotes the base station controller ( The program storage unit 30 stores the operation program of 30), 32 is a system state information storage unit for storing the state of the system with a predetermined flag based on the control signal from the base station controller 30, 33 is from the calling subscriber A subscriber information storage unit 34 for temporarily storing the incoming subscriber's number, 34 is a defective subscriber number storage unit for storing the subscriber's telephone number.

Here, the base station controller 30 determines the usage status of the subscriber of the third-party network that is receiving the communication service from the base station 3 according to a predetermined polling signal from the central control station 2. After that, the central control station 2 continuously determines whether the subscriber is a bad use subscriber based on the subscriber usage information from the base station 3, and notifies the base station 3 when the subscriber becomes a bad subscriber. Done. Then, the base station 3 stores the subscriber in the bad subscriber number storage unit 34. Thus, when an incoming call request is received from the other party's network called party, transmission of the calling subscriber's information is requested. Then, the received calling subscriber's information is determined based on the bad subscriber number storage unit 34, and the communication is rejected. The message is output to the sender.

In addition, reference numeral 40 denotes a board directly connected to a subscriber, and is a telephone data interface card for connecting a plurality of analog subscribers and data subscribers, and 50 denotes a trunk interface that performs 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.

Next, the bad user communication rejection method in the satellite communication system according to an embodiment of the present invention will be described with reference to FIG. 3.

First, when the base station control unit 30 receives a predetermined call request signal for an arbitrary subscriber from a third party network and enters the telephone number of the called subscriber (step ST301), the base station controller 30 detects the telephone number of the called subscriber and stores the subscriber information. The data is stored in the unit 33 (step ST302).

Subsequently, the base station controller 30 requests to transmit the calling subscriber's telephone number to the calling party (step ST303).

Subsequently, when receiving the calling party's telephone number transmitted from the calling party (ST304 step), the base station controller 30 searches for the calling party's telephone number based on the data of the bad subscriber number storing unit 34. (Step ST305, ST306). If the calling subscriber is not a bad subscriber, the base station controller 30 controls the normal call processing (step ST307). That is, the base station controller 30 outputs a call signal to the called subscriber based on the telephone number of the called subscriber stored in the subscriber information storage 33.

On the other hand, when the calling subscriber becomes a defective subscriber in step ST306, a predetermined call setup impossible message is output to the called party (step ST308).

Thus, as described above, it is possible to prevent the use of the subscriber's own network by ignoring the request of the defective subscriber.

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, when a subscriber connected to a third-party network accesses the satellite communication system and uses the service, the subscriber records the subscriber in a predetermined memory in the own network and records the subscriber. By automatically rejecting call processing, it is possible to realize a rejection user communication rejection method in a satellite communication system that selects users and provides services.

Claims (1)

A satellite communication system for providing a communication function to a subscriber having a plurality of base stations each coupled with a plurality of subscribers; A subscriber information updating step of identifying a use state of a subscriber who receives a communication service from the base station and updating subscriber information; A bad subscriber selection step of selecting a bad subscriber based on the use status of the subscriber; If the call request signal is received from the other company's network, the called party digit storage step of storing the called party digit The calling party information requesting step of requesting subscriber information to confirm whether the calling party is a defective subscriber; Calling party determination step of determining whether the calling subscriber is a bad subscriber based on the received subscriber information, and outputting a call setup impossible message to output a predetermined call setup impossible message to the calling party when it is determined that the calling subscriber is a bad subscriber. Bad user communication rejection method in a satellite communication system characterized in that it comprises a step.