[특허]GPS and cellular system interworking

[미국특허] GPS and cellular system interworking 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-005/10
출원번호	US-0078325 (1998-05-14)
발명자 / 주소	Watters J. Michael,CAX Strawczynski Leo,CAX Steer David G.,CAX
출원인 / 주소	Nortel Networks Limited, CAX
대리인 / 주소	Foley & Lardner
인용정보	피인용 횟수 : 132 인용 특허 : 27

초록 ▼

Aspects of global positioning system (GPS) technology and cellular technology are combined in order to provide an effective and efficient position location system. In a first aspect of the invention, a cellular network is utilized to collect differential GPS error correction data, which is forwarded to a mobile terminal over the cellular network. The mobile terminal receives this data, along with GPS pseudoranges using a GPS receiver, and calculates its position using this information. According to a second aspect, when the requisite number of GPS satellites are not in view of the mobile terminal, then a GPS pseudosatellite signal, broadcast from a base station of the cellular network, is received by the mobile terminal and processed as a substitute for the missing GPS satellite signal. A third aspect involves calculating position using GPS when the requisite number of GPS satellites are in view of a GPS receiver, but when the requisite number of GPS satellites are not in view of the GPS receiver, then position is calculated using the cellular network infrastructure. When the requisite number of GPS satellites come back into view of the GPS receiver, then position is again calculated using GPS. A fourth aspect involves using cellular signals already being transmitted from base stations to terminals in a cellular network to calculate a round trip delay, from which a distance calculation between the base station and the terminal can be made. This distance calculation substitutes for a missing GPS satellite signal.

대표청구항 ▼

[ We claim:] [1.]1. A method for determining a geographic position of a mobile terminal comprising the steps of:receiving global positioning system satellite signals having frequencies in a satellite frequency band at the mobile terminal from a plurality of global positioning system satellites that are in view of the mobile terminal;performing, by the mobile terminal, distance calculations using said global positioning system satellite signals to obtain distance measurements representing a pseudorange between the mobile terminal and each of the plurality of global positioning system satellites;transmitting a first signal from the mobile terminal to a cellular network base station, the first signal containing the distance measurements;receiving the first signal by the cellular network base station and forwarding the first signal to a mobile communications switching office;receiving, by the mobile communications switching office, the first signal from the cellular network base station and a second signal that contains differential global positioning satellite error correction data, the second signal being provided by a source;performing, by the mobile communications switching office, corrections on the distance measurements provided in the first signal based on the differential global positioning satellite error correction data, to create corrected pseudorange data;outputting, from the mobile communications switching office to the cellular network base station, a combined cellular signal that corresponds to the corrected pseudorange data combined with data that corresponds to at least one of voice data and data traffic for modems;receiving the combined cellular signal by the cellular network base station and outputting the combined cellular signal to the mobile terminal;receiving the combined cellular signal at the mobile terminal, wherein the combined cellular signal contains the corrected pseudorange data and the at least one of voice data and data traffic for modems;demodulating the combined cellular signal to extract the corrected pseudorange data therefrom, the demodulating being performed by the mobile terminal;determining, by the mobile terminal, a present position of the mobile terminal by using the corrected pseudorange data; andextracting, by the mobile terminal, the at least one of voice data and data traffic for modems from the combined cellular signal, for supplying to a corresponding one of a speaker and a modem coupled to the mobile terminal,wherein the mobile terminal is not capable of calculating the corrected pseudorange data but is capable of calculating the present position of the mobile terminal from the corrected pseudorange data provided to the mobile terminal.

이 특허에 인용된 특허 (27) 인용/피인용 타임라인 분석

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Abaunza John (Goldvein VA), System and method for receiving and decoding global positioning satellite signals.
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Karr, Charles L.; Dupray, Dennis J., Wireless location using multiple mobile station location techniques.
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Dupray, Dennis J.; Karr, Charles L.; Goldberg, Sheldon F., Wireless location using network centric location estimators.
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Karr, Charles L.; Dupray, Dennis J., Wireless location using signal fingerprinting and other location estimators.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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[미국특허] GPS and cellular system interworking 원문보기

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[미국특허] GPS and cellular system interworking 원문보기

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