METHOD OF UPDATING THE CLOCK BIAS BETWEEN A BTS STATION OF A GSM NETWORK AND THE SATELLITES OF A GPS SYSTEM

摘要

The invention relates to a method of updating the clock bias that exists between the common clock of the satellites (S01 to S04) of a radio navigation satellite system (RNSS) and the clock of a radio station (300) of an asynchronous cellular wireless telephony system, the latter consisting of a mobile device (200) comprising a radio navigation satellite receiver (RNSS) which receives satellite data (P01 to P04) supplied by four satellites (S01 to S04) and a support server (500) for improving the acquisition of satellite data by the mobile device (200). The inventive method comprises the following steps in which: the mobile device (200) receives satellite data (P01 to P04), the mobile device (200) calculates pseudo-distances between the mobile device (200) and the satellites (S01 to S04), the pseudo-distances are encapsulated with the date (DE) on which said distances were calculated, the pseudo-distances and the date (DE) on which the distances were calculated are transmitted in the form of a radio signal from the mobile device (200) to the support server (500) via the radio station (300), the support server (500) determines the position of the mobile device and estimates the clock bias between the common clock of the satellites (S01 to S04) and the clock of the radio station (300) using the aforementioned pseudo-distances and the date (DE) on which the pseudo-distances were calculated.