The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2007
Filed:
Sep. 10, 2004
Niilo Sirola, Tampere, FI;
Niilo Sirola, Tampere, FI;
Nokia Corporation, Espoo, FI;
Abstract
The invention relates to a method and a system for determining the position of a device () by taking measurements to determine the range between at least a first positioning station () and the device () and to determine the range between at least a second positioning station () and the device (). At least one measurement defines a geometric surface for the position of the device (). Said first positioning station () and second positioning station () belong to different systems. In the invention, the measurements are used to select a geometric model which comprises, at the most, quadratic surfaces, the selected geometric model is simplified to reduce the number of quadratic surfaces, the measurement results are inserted in the simplified geometric model, and the position of the device () is determined by solving the simplified geometric model. The invention also relates to a device () and a program in which the method is applied, as well as to a storage means for storing the program.