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Estimation of a signal delay

  • US 7,218,939 B2
  • Filed: 12/02/2003
  • Issued: 05/15/2007
  • Est. Priority Date: 12/02/2002
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • estimating a delay of a signal received at a mobile station from a specific network element of a network within a search window; and

    determining said search window based on location information available for said specific network element and based on a known distance of said mobile station to at least one other network element,wherein said at least one other network element comprises at least two network elements, to which a respective distance was already determined based on delay measurements on signals from said at least two network elements,wherein said search window is selected such that it covers intersection points of all circles around said at least two network elements with a radius of the respectively determined distance, andwherein said search window is used to determine the location of said mobile station.

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