Patent ID: 6920124

Claim:
A method for transmitting useful data from a first mobile station ( 1 ) to a second mobile station ( 5 ), in which for transmission in a first telecommunication network ( 10 ), the first mobile station ( 1 ) source encodes useful data in a first step and then channel encodes the useful data in a second step; the useful data encoded in the first and second steps are transmitted in the form of a first bit stream to an intermediary station ( 15 ) via a transmission channel of the first telecommunication network ( 10 ); the useful data channel encoded in the second step presented in the first bit stream are channel decoded by the intermediary station ( 15 ); for transmission in a second telecommunication network ( 20 ), the useful data are channel encoded by the intermediary station ( 15 ) and the useful data thus channel encoded are transmitted to a second mobile station ( 5 ) via a transmission channel of the second telecommunication network ( 20 ), signalization data are transmitted from the intermediary station ( 15 ) to the second mobile station ( 5 ), said signalization data containing information regarding the type of encoding of the useful data in the first step, the useful data channel encoded in the intermediary station are channel decoded by the second mobile station ( 5 ), and then the useful data channel decoded by the second mobile station ( 5 ) are source decoded by the second mobile station ( 5 ), according to the signalization data received by the second mobile station ( 5 ).