Refeeding low density in high latency wireless systems and limited bandwidth.

Method for a system comprising a transmitter transmitting to a receiver a plurality of packets containing each of said packet header, said method providing a feedback of low density from the receiver to the transmitter indicating receipt of a packet whose header will used as reference header and includes: transmitting from the transmitter to the receiver a packet whose header is to be used as a reference header; receiving in the receiver said packet with the reference header and in response providing feedback from one receiver to transmitter indicating receipt of said packet having the reference header; and characterized by waiting a predetermined before providing another feedback in response to another packet having the reference header to allow reception of information in the receiver indicating that the transmitter has received said feedback period.