[특허]Locating a mobile unit in a wireless time division multiple access system

[미국특허] Locating a mobile unit in a wireless time division multiple access system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/20
출원번호	US-0416624 (1999-10-12)
발명자 / 주소	Brian J. Bogdan Michael J. Golden Alex Matusevich Jonathan M. Tobias Chris C. Tsamutalis
출원인 / 주소	Lucent Technologies Inc.
대리인 / 주소	Steve Mendelsohn
인용정보	피인용 횟수 : 25 인용 특허 : 4

초록 ▼

A method for locating a mobile unit without synchronizing base-stations is provided. A triangulation scheme where distances between a plurality of base-stations and a mobile unit (herein termed mobile) are calculated by measuring at least three round-trip-delay-values wherein each round-trip-delay-value corresponds to transmission of a downlink signal from each base-station to the mobile unit and transmission of an uplink signal, in response to the downlink signal, from the mobile unit to each base-station is described. It is a low-cost solution without requiring the participating base-stations to be accurately synchronized in time and with the added advantages of utilizing a known downlink signal and a known uplink signal in determining the position of the mobile.

대표청구항 ▼

1. A method for locating a mobile unit in a wireless network having a plurality of base-stations, comprising the steps of:(a) receiving at least three round-trip-delay-values, each round-trip-delay-value corresponding to transmission of a downlink signal from one of at least three base-stations to the mobile unit and transmission of an uplink signal, in response to the downlink signal, from the mobile unit to the one base-station; (b) adjusting each round-trip-delay-value for one or more delays not corresponding to signal propagation time; and (c) determining the position of the mobile unit based on the at least three round-trip-delay-values using a triangulation algorithm, wherein: the one or more delays comprise a cell group delay on the downlink path, a mobile group delay on the downlink path, a mobile group delay on the uplink path, and a cell group delay on the uplink path.

이 특허에 인용된 특허 (4) 인용/피인용 타임라인 분석

Bodin Stig Roland,SEX, Method and apparatus for mobile station geographical location determination.
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Cedervall Mats,SEX ; Lundqvist Patrik,SEX, Method and system for determining position of a cellular mobile terminal.
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Innes Gordon Dingwall,GBX ; Bonner David,GBX, Mobile radio systems.
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Dufour Daniel (Blainville CAX), System and method of locating a mobile terminal within the service area of a cellular telecommunication system.
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이 특허를 인용한 특허 (25) 인용/피인용 타임라인 분석

Walma, Mathys C.; Roberts, Richard D.; Cordeiro, Carlos, Apparatus, system and method of estimating a location of a mobile device.
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Ranki, Ville; Kainulainen, Antti; Kalliola, Kimmo; Belloni, Fabio, Determining location and orientation of directional transceivers.
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Pelaez,Mariana Benitez; Lee,Anne Yin Fee; Mathai,Samuel Stinson, Dynamic grouping of wireless terminal.
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Chen, Byron Hua; Richton, Robert Ellis; Tekin, Ibrahim; Vannucci, Giovanni, Method and apparatus for estimating the location of a mobile terminal.
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Sheen,Baoling S.; Benco,David S.; Overend,Kevin J.; True,Sandra Lynn; Voight,Kenneth J., Method and apparatus for providing location based vendor information to a wireless mobile terminal.
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Rofheart, Martin; McCorkle, John W., Method and system for enabling device functions based on distance information.
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Rofheart,Martin; McCorkle,John W., Method and system for enabling device functions based on distance information.
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McCorkle, John W., Method and system for performing distance measuring and direction finding using ultrawide bandwidth transmissions.
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McCorkle, John W., Method and system for performing distance measuring and direction finding using ultrawide bandwidth transmissions.
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Splett,Armin, Method for finding the position of a subscriber in a radio communications system.
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Riley, Wyatt Thomas; Blackmer, John R.; Farmer, Dominic Gerard; Pon, Rayman Wai, Method for position determination with measurement stitching.
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Jiao, Wenhua; Jiang, Pin; Ma, Yuanyuan; Liu, Ruoju, Method for positioning mobile devices and apparatus for positioning mobile devices.
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Cheok, Ka C.; Smid, G. Edzko, Navigation system.
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Cheok,Ka C.; Smid,G. Edzko, Navigation system.
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Cheok, Ka C.; Smid, Gert Edzko; Fleck, Paul W.; Stiglich, Thomas P., Navigation unit and base station.
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Riley, Wyatt Thomas; Rowitch, Douglas Neal; Farmer, Dominic Gerard, Position determination using measurements from past and present epochs.
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Riley, Wyatt Thomas; Rowitch, Douglas Neal; Farmer, Dominic Gerard, Position determination using measurements from past and present epochs.
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Opshaug,Guttorm, Psuedo television transmitters for position location.
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Islam, Tariqul; Carlson, John, Ranging in UMTS networks.
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Kulik, Victor; Czompo, Joseph, Real-time data with post-processing.
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Umatt, Bhupesh M.; Amerga, Daniel; Tenny, Nathan E., Reestablishment procedure for an emergency call.
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Umatt, Bhupesh M.; Amerga, Daniel; Tenny, Nathan E., Reestablishment procedure for an emergency call.
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Islam, Tariqul; Carlson, John; Al-Mufti, Khalid; Hannan, Ariful, System and method of UMTS UE location using uplink dedicated physical control channel and downlink synchronization channel.
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Cheok, Ka C.; Smid, G. Edzko, Target and base station for a navigation system.
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Shirakawa, Kazuo, Target detection apparatus and system.
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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

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[미국특허] Locating a mobile unit in a wireless time division multiple access system 원문보기