Alcatel

Roland Thies

Jean Charpentier

Erick Flores

Antoine Totaro

The present invention relates to a method of routing a call between a first terminal which is a mobile terminal (,) and a second terminal (,) in a global telecommunications network, it being possible for the call to be routed in the global network a)&mdash;at least in part through a satellite telecommunications network (,) using base stations (,) giving access to satellites, and b) &mdash;at least in part through a terrestrial telecommunications network (PSTN) connected to the base stations (,), each satellite (,) in the satellite telecommunications network defining an overall coverage area covering a plurality of base stations, the overall coverage area defining a plurality of coverage sub-areas, each of which is associated with a respective one of the base stations (,). The method is characterized in that it includes a location updating step in which the location of the first terminal (,) is updated as being in coverage sub-area associated with that one of the base stations (,) which is closest to the second terminal so as to minimize the routing distance over which the call travels through the terrestrial telecommunications network (PSTN).

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Paris, France

Roland Thies