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Direct amplifying station and positioning method for mobile station thereof

  • US 7,283,787 B2
  • Filed: 01/27/2003
  • Issued: 10/16/2007
  • Est. Priority Date: 04/26/2002
  • Status: Expired due to Term
First Claim
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1. A method for positioning a mobile station including a repeater comprising a cell identifier generator module in a downlink circuit structure of the repeater, wherein the cell identifier generator module comprises:

  • a synchronization searching unit for searching for a base station pilot signal;

    a time delay unit for generating a fixed delay according to the searching result from the synchronization searching unit; and

    a cell identifier signal generating unit for generating a cell identifier signal;

    wherein is a delay between a frame start time of the base station pilot signal and a frame start time of the cell identifier signal is the fixed delay;

    the method comprising the steps of;

    (1) issuing the cell identifier signal, the fixed delay, and a search window width from the repeater in response to a positioning request from the mobile station, wherein the cell identifier signal is searched in a time range defined by the search window width and the fixed delay;

    (2) measuring a Time Difference Of Arrival (TDOA) between the cell identifier signal and the base station pilot signal and reporting the measured TDOA, by the mobile station;

    (3) determining whether the value of TDOA equals to the fixed delay;

    if so, going to step (4);

    otherwise going to step (7);

    (4) measuring a Time Of Arrival (TOA), TOAm, from the mobile station to the base station through the repeater;

    (5) determining a value of TOAtrans with the formula;

    TOAtrans=TOAm

    TOAc, wherein the TOAtrans means TOA from the mobile station to the repeater, and the TOAc, means a calibrated TOA from the repeater to the base station;

    (6) calculating the distance between the mobile station and the repeater through multiplying TOAtrans with light velocity; and

    (7) determining the position of the mobile station.

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