Patent ID: 6646995
Filing Date: 2003-11-11
Classification: H04L,H04W

Abstract:
A method for exchanging digital signals bi-directionally between at least one mobile station and a network of a mobile radio system providing at least two coding modes, each-mode corresponding to a predetermined source coding and a predetermined channel coding for transmission of a wanted signal for each transmission direction, said method comprising the steps of:at the time of a call between a mobile station and the network, carrying out two separate measurements of transmission quality for each transmission direction, respectively; for each transmission direction, selecting, in said network, one of said coding modes in accordance with a corresponding one of said two measurements of transmission quality; causing said mobile station to transmit, to said network, information representative of the measurements of transmission quality in a downlink direction from said network to said mobile station; and causing said network to transmit, to said mobile station, information representative of said selected one of said coding modes.