Patent ID: 8655372

Claim:
Method for determining by trilateration position of an access point of a wireless radio system comprising the following steps: retrieving signal measurements between the access point (HS 4 ) of which the position is to be determined and a radio device at a plurality of locations (FP 1 , FP 2 , FP 3 ) and signal measurements between a plurality of further access points (HS 1 , HS 2 , HS 3 ) with a known position and the radio device at the plurality of locations; determining the position of the plurality of locations based on the signal measurements between the further access points and the radio device; and determining the position of the access point based on the signal measurements between the access point and the radio device and based on the position of the locations by solving a system of equations formed by three circumferences wherein, a) the circumference centres correspond to the three locations; b) the circumference radii correspond to the distances, wherein a proportionality factor (N,M) of at least some of the distances with respect to another of the distances is used as an input to the system of equations.