Patent ID: 8737309

Claim:
Data packet transmission process in a communication system comprising: communicating from at least one terminal (UE) communicating to a base station (BS), transmitting of the data packet with a given power, from the terminal to the base station based on a HARQ scheme to obtain a residual packet error rate PER res after a number of transmissions Tr n , jointly selecting of the following parameters: the number of transmissions Tr n ; the target packet error rate PER tg (i) of each transmission i, where i=1, . . . , Tr n , to arrive at the residual packet error rate PER res ; and the modulation and coding scheme m corresponding to each target packet error rate PER tg (i) so as to minimise the data packet transmission power, wherein the data packet is transmitted on a transmission resource and wherein the selection (S) of the modulation and coding scheme m corresponding to each target packet error rate PER tg (i) is such that the signal-to-interference-plus-noise ratio SINR m (i)≦P m (i)·γ where P m (i) is the transmission power required for the transmission i and γ is an indicator of the propagation channel quality.