Patent ID: 7733914

Claim:
A method of transmitting data from a first station to a second station, comprising: at the first station, dividing the data into a sequence of data packets and transmitting the sequence of data packets; at the second station, receiving the data packets and transmitting acknowledgements indicating whether the data packets have been received successfully; at the first station, retransmitting as a sub-sequence of a plurality of sub-packets a data packet which has not been received successfully; at the second station, reconstituting the data from the data packets and sub-packets; wherein the data packets comprise a sequence number providing an indication of position of each data packet within the sequence of data packets, the sub-packets comprise a sub-packet indicator providing an indication of position of each sub-packet within the sub-sequence of sub-packets, the sequence numbers and sub-packet indicators include a plurality of numbers in common, and the first station transmits a dummy packet before transmitting a sub-packet of the sub-sequence of the plurality of sub-packets, the dummy packet having a dummy sequence number same as the sub-packet indicator of the sub-packet of the sub-sequence of the plurality of sub-packets which is transmitted thereafter.