Patent ID: 7403155

Claim:
A method of accelerated acquisition ot positioning satellite signals from a satellite location system for a mobile terminal, wherein the mobile terminal moves from the interior to the exterior of a building, and the mobile terminal couples a transceiver capable of exchanging signals of a local range telecommunication system to a transceiver capable of exchanging positioning satellite signals of the satellite location system, the method comprising: determining an approximate position of the mobile terminal by measuring a parameter of a signal from at least one access point of the local range telecommunication system, wherein the mobile terminal searches for location information and detects the at least one access point, determining orientations of various satellites within the satellite location system which can be perceived from the determined position of the mobile terminal, determining a probability of acquisition of signals from the various satellites, as a function of the azimuth and the elevation of each perceived satellite, and as a function of a radio wave attenuation coefficient for the determined position of the mobile terminal known to a system of cartographic representation of buildings and their internal architecture, wherein the system associates with each position within a building a distribution of probability of acquisition of a satellite signal from a given direction, searching for satellite signals from each perceived satellite for which the probability of reception exceeds a certain threshold, and synchronizing the mobile terminal to acquired satellite signals.