Patent ID: 6977888
Filing Date: 2005-12-20
Classification: H04L

Abstract:
1. For use in data packet transmissions between a transmitter and a receiver where a data packet includes a first type of bits corresponding to actual information bits and a second type of bits corresponding to parity bits, the information bits being more important to decoding than the parity bits, a method comprising: detecting an error in a received data packet; sending a negative acknowledgment signal to the transmitter to trigger a first type of retransmission of the parity bits to be used in a subsequent decoding operation at the receiver; detecting an absence of a lost data packet; sending a lost signal message to the transmitter rather than the negative acknowledgment signal, the lost signal message indicating that the lost data packet was detected as not received; in response to the sending of the lost signal message, receiving from the transmitter a second different type of retransmission of the information bits of the lost data packet; decoding the second different type retransmission.