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Method and system for determining position of a cellular mobile terminal 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04Q-007/20
출원번호 US-0935421 (1997-09-23)
발명자 / 주소
  • Cedervall Mats,SEX
  • Lundqvist Patrik,SEX
출원인 / 주소
  • Telefonaktiebolaget L M Ericsson (publ), SEX
대리인 / 주소
    Jenkens & Gilchrist, P.C.
인용정보 피인용 횟수 : 143  인용 특허 : 4

초록

A method and system are disclosed by which a round-trip calculation is used to determine the distance between a mobile radio station (MS) and a radio base station (BS) using the apparent uplink and downlink signal propagation air-times (e.g., T-up and T-down). As such, no absolute time reference is

대표청구항

[ What is claimed is:] [1.] A method for determining the round-trip air-time between a mobile radio station and a first radio base station, comprising the steps of:said mobile radio station and said first radio base station each determining a local time of transmission of an uplink signal and a down

이 특허에 인용된 특허 (4)

  1. Manabe Shinichi (Tokyo JPX), Digital mobile communications system and method for providing intensity/coverage reference maps using base stations and.
  2. Maine Kristine P. (Phoenix AZ) Olds Keith A. (Mesa AZ) Attwood Stanley W. (Sun Lakes AZ), Location system and method with acquisition of accurate location parameters.
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  4. Hatakeyama Izumi (Tokyo JPX), Mobile communication system.

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