Patent ID: 6563826
Filing Date: 2003-05-13
Classification: H04L

Abstract:
Method of controlling errors in the transmission of packets transmitted between a transmitter and a receiver, said transmitter receiving from an input multiplex packets belonging to a plurality of end to end associations and transmitting them in the form of sequences of packets over a transmission line, said receiver, on reception of a packet, verifying whether said packet is correctly received and if so, delivering said packet to an output multiplex, and if not, sending to said transmitter a negative acknowledgment so that the transmitter can retransmit said packet, characterized in that it comprises, at the transmitter side, of allocating, to each packet to be transmitted over the transmission line, two indices, a first index giving a sequence number of said packet and a second index enabling said packet to point to the last packet which was previously transmitted belonging to the same end to end association as said packet, and, at the receiver side, determining, on a correct reception of a packet, the packet pointed to by said received packet, and, if this packet pointed to has been delivered to the output multiplex, then delivering said received packet, otherwise not delivering said received packet.