[특허]Mobile positioning method for a portable communications device using shortened repetitive bursts

[미국특허] Mobile positioning method for a portable communications device using shortened repetitive bursts 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/20
출원번호	US-0037988 (1998-03-10)
발명자 / 주소	Koorapaty Havish Lundqvist Patrick Nils,SEX Raith Alex Krister
출원인 / 주소	Ericsson Inc.
대리인 / 주소	Wood, Phillips, VanSanten, Clark & Mortimer
인용정보	피인용 횟수 : 60 인용 특허 : 4

초록 ▼

Standard mobile cellular telephones use shortened burst signal transmissions to synchronize the transmission of a call over a cellular telephone network. These shortened bursts as well as other traffic channel bursts can be used to locate the position of the cell phone. In operation, a primary base station sends a traffic channel designation message to a selected mobile phone which then initiates selected traffic channel burst transmissions, such as shortened bursts, over an interval of five seconds or less. The primary station and at least two other neighboring base stations receive these burst transmissions and determine their respective distances from the cell phone based upon the time of arrival of the bursts or some other suitable distance related measurement. A command center determines the location of the cell phone by triangulating the distance measurements of the base stations.

대표청구항 ▼

[ We claim as our invention:] [1.]1. A method for detecting the position of a mobile communication unit in a communication system having a plurality of spatially dispersed base stations, the system using a shortened traffic channel burst transmission from the mobile unit, the method comprising the steps of:a) transmitting shortened traffic channel burst signals from the mobile unit to a primary base station and a plurality of other neighboring base stations;b) measuring a distance related characteristic of the shortened traffic channel burst signals from the mobile unit to said primary base station and said plurality of neighboring base stations;c) detecting the accuracy of said measurements;d) when the accuracy of said measurements is not acceptable, continuing steps a through c until an accurate measurement is achieved or a defined time has passed; ande) when the accuracy of said measurements is acceptable, calculating the position of the mobile unit from said measurements.

이 특허에 인용된 특허 (4) 인용/피인용 타임라인 분석

Stilp Louise A. (Broomall PA) Knight Curtis A. (Washington DC) Webber John C. (Herndon VA), Cellular telephone location system.
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Buford Kevin A. ; Reed John D. ; Rozanski ; Jr. Walter J. ; Ghosh Amitava, Method and apparatus for location finding in a communication system.
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Forssen Ulf Goran,SEX ; Berg Jan-Erik,SEX ; Ghisler Walter,SEX, Method and system for determining the position of mobile radio terminals.
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Stilp Louis A. (Broomall PA) Knight Curtis A. (Washington DC) Webber John C. (Herndon VA), System for locating a source of bursty transmissions cross reference to related applications.
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이 특허를 인용한 특허 (60) 인용/피인용 타임라인 분석

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Gonzalez, Armando J.; Ruelke, Charles R.; Swope, Charles B., Method and device for generating a location signal.
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Tsunehara, Katsuhiko; Doi, Nobukazu; Kuwahara, Mikio; Ishifuji, Tomoaki, Method for measuring distance and position using spread spectrum signal, and an equipment using the method.
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Haney, Richard D., Methods and apparatuses for geospatial-based sharing of information by multiple devices.
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Diener,Neil R.; Floam,D. Andrew; Sugar,Gary L.; Kloper,David S., System and method for locating sources of unknown wireless radio signals.
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[미국특허] Mobile positioning method for a portable communications device using shortened repetitive bursts 원문보기