Patent ID: 8578223

Claim:
A method for transmitting data, the method comprising: Producing at least one data frame for transmission, the data frame at least including user data and a sequence number, transmitting the data frame by means of a transmitter to a receiver via data link and saving a copy of the data frame in a retransmission buffer which is included In the transmitter, and if saving a copy requires that data already present in the retransmission buffer is overwritten, selecting the one or more of the oldest data frames in the retransmission buffer to be overwritten, in case an error is detected at the receiver, communicating an error message to the transmitter of the data frame, which error message at least comprises an indication of the sequence number of the last correctly received data frame, upon receipt of such message and if available, retransmitting all the data frames from the retransmission buffer having a sequence number higher than the sequence number indicated in the error message, the retransmitted frames being retransmitted in the order of their sequence numbers.