TELECOMMUNICATIONS SYSTEM AND PROCEDURE TO ENSURE THE OPERATION OF A MOBILE PHONE ON BOARD OF A VEHICLE DURING THE CROSSING OF A BORDER, AND REPEATER FOR THIS SYSTEM.

摘要

Telecommunication system to ensure the operation of a mobile phone (10) on board a vehicle (8) during the crossing of a geographical border (20) that separates its "Home Public Land Mobile Network", hereinafter HPLMN, of a "Public Land Mobile Network" network, hereinafter PLMN, foreign selectable by the mobile phone executing a roaming functionality, this system including: - a first and a second station, (14, 16), suitable for respectively emit a first signal and a second telecommunication signal to allow the establishment and / or maintenance of a telecommunication connection from the mobile telephone, the first station belonging to the HPLMN network and the second station belonging to the foreign PLMN network, and - a repeater (34) placed on board the vehicle suitable for amplifying and redrawing at least one of the telecommunication signals with a sufficient power level permanently to allow the mobile phone (10) on board the vehicle to establish and / or maintain a telecommunication connection regardless of the power variations of the telecommunication signal received by the repeater, characterized in that the repeater (34) is equipped: - of a convenient supervision module (44) for detecting the crossing through the vehicle of said border, and - of a module (46) for selecting the amplified and diffused signal by the repeater, this module being convenient for selecting only the first signal telecommunication while the detector does not detect the border crossing, and only the second telecommunication signal when the detector detected that the border was crossed.