최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0284177 (1994-08-02) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 387 인용 특허 : 0 |
A tracking system for tracking a portable or mobile phone unit utilizes an array of fixed wireless signal transceivers forming part of a wireless telephone system. The phone unit includes a processor for generating an emergency signal on detection of an emergency condition and transmitting the emerg
A tracking system for tracking a portable or mobile phone unit utilizes an array of fixed wireless signal transceivers forming part of a wireless telephone system. The phone unit includes a processor for generating an emergency signal on detection of an emergency condition and transmitting the emergency signal to a remote monitoring station via the wireless telephone network. The emergency signal includes identifying information for identifying the phone unit, as well as identifying or control channel signals received by the phone unit from adjacent wireless signal transceivers which are retransmitted as part of the emergency signal to be used at the remote monitoring station to compute an approximate location of the phone unit.
A tracking system for tracking a movable object, comprising: an array of fixed wireless signal receiving and transmitting units each covering a predetermined area and forming part of a wireless telephone network, each fixed wireless unit including means for transmitting wireless voice and control ch
A tracking system for tracking a movable object, comprising: an array of fixed wireless signal receiving and transmitting units each covering a predetermined area and forming part of a wireless telephone network, each fixed wireless unit including means for transmitting wireless voice and control channel signals identifying said unit; a movable signal processing unit, the unit including signal generating means for generating an emergency signal on detection of an emergency condition, the signal generating means including means for continuously scanning all voice and control channel signals from any fixed wireless signal receiving and transmitting units within range of the signal processing unit during an emergency condition and storing any received wireless unit identifying signals, and means for transmitting said emergency signal via said array of signal receiving and transmitting units, each emergency signal including received wireless unit identifying signals and identifying information for identifying the signal processing unit; and a monitoring means for receiving said emergency signals and computing an approximate location of said signal processing unit from said received wireless unit identifying signals.
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