×

Method of locating and measuring a mobile station

  • US 20040264407A1
  • Filed: 07/26/2004
  • Published: 12/30/2004
  • Est. Priority Date: 01/24/2002
  • Status: Active Grant
First Claim
Patent Images

1. A method of locating and measuring a mobile station (MS), comprising:

  • a. selecting a reference base station and neighbor base stations according to quality of received signals by a Mobile Location Center;

    b. calculating parameters of a large search window and a effective search window;

    a large search window starting location Tstart and stop location Tstop and an effective search window starting location tstart and stop location tstop, according to information concerned about the reference base station, neighbor base stations and the MS by the Mobile Location Center, and initiating a measurement request to the MS;

    c. setting a large search window and an effective search window for the neighbor base stations according to measured parameters and the parameters of a large search window and a effective search window by the MS;

    d. determining first path of the neighbor base stations with the large search window and the effective search window by the MS;

    e. outputting first path determination result of the neighbor base station downlink signal by the MS;

    f. making correlation operation with first path of the neighbor base station downlink signal and first path of the reference base station downlink signal, and obtaining Time Difference Of Arrival (TDOA);

    g. locating the MS according to two or more than two TDOAs obtained in Step f.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×