Patent ID: 7254412

Claim:
A method, comprising: reserving identifiers cyclically from a finite identifier space; attaching identifiers to data blocks to be transmitted for identification; transmitting the data blocks from a first transceiver; receiving the data blocks by a second transceiver; maintaining information at the second transceiver on the position of an incremental redundancy specific window belonging to the finite identifier space; and when reception of a data block of the data blocks by the second transceiver fails, storing at the second transceiver the data block into a reception memory, retransmitting said data block from the first transceiver with the same identifier as the original transmission, re-receiving said data block by the second transceiver, comparing at the second transmitter the identifiers of a re-received data block and an earlier received data block with each other, defining the re-received data block and the earlier received data block as the same, if the re-received data block and the earlier received data block have a same identifier and it is detected that said same identifier has been in the incremental redundancy specific window maintained by the second transceiver continuously from a reception time of the earlier received data block to a reception time of the re-received data block, and combining the data blocks defined as the same.