KR970013882A - WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM - Google Patents

WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM Download PDF

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Publication number
KR970013882A
KR970013882A KR1019950026324A KR19950026324A KR970013882A KR 970013882 A KR970013882 A KR 970013882A KR 1019950026324 A KR1019950026324 A KR 1019950026324A KR 19950026324 A KR19950026324 A KR 19950026324A KR 970013882 A KR970013882 A KR 970013882A
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KR
South Korea
Prior art keywords
call
voice signal
header code
frequency channel
frequency channels
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Application number
KR1019950026324A
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Korean (ko)
Inventor
홍충선
Original Assignee
배순훈
대우전자 주식회사
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Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950026324A priority Critical patent/KR970013882A/en
Publication of KR970013882A publication Critical patent/KR970013882A/en

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Abstract

본 발명은 통화시에 사용할 주파수채널을 복수개 선택입력시키고 나서 통화를 하게 되면 통화종료시까지 주파수채널이 소정시간을 주기로 그 선택된 주파수채널내에서 자동으로 절환되면서 통화내용을 송신 및 수신하도록 함으로써 도청방지를 도모하도록 한 무선전화시스템의 도청방지방법을 제공하기 위한 것이다.The present invention is to prevent the eavesdropping by selecting and inputting a plurality of frequency channels to be used in a call and then transmitting and receiving a call while the frequency channel is automatically switched within the selected frequency channel at a predetermined time until the call ends. An object of the present invention is to provide a method for preventing eavesdropping of a wireless telephone system.

이를 위해 본 발명은, 통화중에 사용할 주파수채널을 복수개 선택하는 제1단계와, 그 선택된 복수개의 주파수 채널을 저장함과 더불어 통화가 개시되면 그 저장된 주파수채널중에서 임의의 주파수채널을 통해 송신자의 음성신호를 변조하는 제 2단계, 그 변조된 음성신호에 해당 주파수채널선택용 헤더코드를 실어 송신하는 제 3단계 및 소정시간경과여부 및 통화종료여부를 판단하여 소정시간이 경과된 상태에서 통화가 종료되지 않게 되면 상기 저장된 다른 주파수채널로 자동절환시켜 상기 음성신호변조동작과 상기 해당 헤더코드부여동작 및 상기합성 신호송신동작이 반복실행되도록 하는 제 4단계로 이루어진 송신시의 과정과; 통화가 개시되면 수신되는 신호중에서 헤더코드를 추출하는 제 1단계와, 그 추출된 헤더코드를 기초로 하여 변조된 음성신호를 복조하는 제 2단계 및 그 복조된 음성신호의 노이즈성분을 제거한 후 출력하는 제 3단계로 이루어진 수신시의 과정으로 구성된 것을 특징으로 한다.To this end, the present invention provides a first step of selecting a plurality of frequency channels to be used during a call, and storing the selected plurality of frequency channels, and when a call is initiated, transmits a voice signal of a transmitter through an arbitrary frequency channel among the stored frequency channels. A second step of modulating, a third step of transmitting a corresponding header code for selecting a frequency channel to the modulated voice signal, and determining whether a predetermined time has elapsed and whether or not the call is terminated so that a call is not terminated after a predetermined time has elapsed; And a fourth step of automatically switching to another stored frequency channel to repeat the voice signal modulation operation, the corresponding header code assignment operation, and the synthetic signal transmission operation. When a call is initiated, a first step of extracting a header code from a received signal, a second step of demodulating a modulated voice signal based on the extracted header code, and removing the noise component of the demodulated voice signal are output. It is characterized by consisting of a process at the time of reception consisting of a third step.

Description

무선전화시스템의 도청방지방법(WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM)WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 채용되는 무선전화시스템의 도청방지장치의 블럭구성도,1 is a block diagram of a wiretap prevention apparatus of a wireless telephone system employed in the present invention;

제2도는 본 발명에 따른 무선전화 시스템의 도청방지방법을 설명하는 플로우차트로서, (A)는 송신시의 동작을 설명하는 도면이고, (B)는 수신시의 동작을 설명하는 도면이다.2 is a flowchart illustrating a method for preventing eavesdropping in a radiotelephone system according to the present invention, where (A) is a diagram illustrating an operation at the time of transmission and (B) is a diagram illustrating an operation at the time of reception.

Claims (1)

통화중에 사용할 주파수채널을 복수개 선택하는 제 1단계와, 그 선택된 복수개의 주파수채널을 저장함과 더불어 통화가 개시되면 그 저장된 주파수채널중에서 임의의 주파수채널을 통해 송신자의 음성신호를 변조하는 제 2단계, 그 변조된 음성신호에 해당 주파수채널선택용 헤더코드를 실어 송신하는 제 3단계 및 소정시간경과여부 및 통화종료여부를 판단하여 소정시간이 경과된 상태에서 통화가 종료되지 않게 되면 상기 저장된 다른 주파수채널로 자동절환시켜 상기 음성신호변조동작과 상기 해당 헤더코드부여동작 및 상기 합성신호송신동작이 반복실행되도록 하는 제 4단계로 이루어진 송신시의 과정과; 통화가 개시되면 수신되는 신호중에서 헤더코드를 추출하는 제 1단계와, 그 추출된 헤더코드를 기초로 하여 변조된 음성신호를 복조하는 제 2단계 및 그 복조된 음성신호의 노이즈성분을 제거한 후 출력하는 제 3단계로 이루어진 수신시의 과정으로 구성된 것을 특징으로 하는 무선전화시스템의 도청방지방법.A second step of selecting a plurality of frequency channels to be used during a call, and storing the selected plurality of frequency channels and modulating a sender's voice signal through an arbitrary frequency channel among the stored frequency channels when a call is initiated; The third step of transmitting the corresponding header code for selecting the frequency channel on the modulated voice signal and determining whether the predetermined time has elapsed and whether the call has been terminated. And a fourth step of transmitting the voice signal modulation operation, the corresponding header code granting operation, and the synthesized signal transmission operation to be repeatedly executed by automatically switching to the transmission signal. When a call is initiated, a first step of extracting a header code from a received signal, a second step of demodulating a modulated voice signal based on the extracted header code, and removing the noise component of the demodulated voice signal are output. A method for preventing eavesdropping in a radiotelephone system, characterized in that it comprises a third step of receiving. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950026324A 1995-08-24 1995-08-24 WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM KR970013882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950026324A KR970013882A (en) 1995-08-24 1995-08-24 WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950026324A KR970013882A (en) 1995-08-24 1995-08-24 WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM

Publications (1)

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KR970013882A true KR970013882A (en) 1997-03-29

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KR1019950026324A KR970013882A (en) 1995-08-24 1995-08-24 WIRETAP PREVENTION METHOD OF WIRELESS TELEPHONE SYSTEM

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