Patent ID: 7750844

Claim:
A method of updating the clock bias between the common clock of the satellites of a radio navigation satellite system and the clock of a radio station of an asynchronous cellular radiotelephone system including a mobile device, a radio navigation satellite system receiver for receiving satellite data supplied by at least four satellites, and an assistance server for improving the acquisition of satellite data by said mobile device, said method including the following steps: said mobile device receiving said satellite data, said mobile device calculating pseudodistances between itself and said satellites, encapsulating said pseudodistances with the time at which said pseudodistances are calculated, transmitting said pseudodistances and said time at which said pseudodistances are calculated in the form of a radio signal from said mobile device to said assistance server via said radio station, and said assistance server determining the position of said mobile device and estimating the clock bias between the common clock of said satellites and the clock of said radio station using said pseudodistances and said time at which said pseudodistances are calculated.