Patent Document ID: 20130329581
Application ID: 13650136
Patent Flag: 0

Claim One:
1. A method for positioning a mobile device in a wireless wide area network comprising: determining three measurement circles according to coordinates of three base stations, and respectively calculating radiuses of the three measurement circles and distances between the three base stations; determining an object function, wherein the object function is expressed with a first variable, a second variable, a third variable, and a fourth variable; respectively determining a first variable coding range, a second variable coding range and a third variable coding range according to the radiuses of the three measurement circles and the distances between the three base stations; determining a fourth variable coding range; coding the first variable coding range, the second variable coding range, the third variable coding range, and the fourth variable coding range; selecting a plurality of combinations of the first variable, the second variable, the third variable, and the fourth variable respectively within the first variable coding range, the second variable coding range, the third variable coding range, and the fourth variable coding range as a parent population of the object function; performing iterations of a genetic algorithm by using the parent population as a basis to derive a best solution of the first variable, the second variable, the third variable, and the fourth variable for the object function; and converting the best solution of the first variable, the second variable and the third variable into a position of the mobile device according to the coordinates of three base stations to position the mobile device in the wireless wide area network.