Patent ID: 8718083

Claim:
An apparatus comprising a transmitter configured to transmit, in a fragmentation transmission mode, a set of data being divided in a plurality of fragment frames, wherein the fragment frames are transmitted in a consecutive order, a receiver configured to receive an acknowledgment message for confirming a successful transmission of the data frames, a determiner configured to determine whether or not an acknowledgment message for confirming the successful transmission of one fragment frame is received before the next fragment frame is transmitted or before the transmission is completed, a retransmission processing portion configured, in case the determiner determines that the acknowledgment for the successful transmission of the one fragment frame is not received, to maintain the fragmentation transmission mode and to initiate a retransmission of the fragment frame corresponding to that for which the acknowledgement of the successful transmission is not received, and a distinguisher configured to distinguish a receiving status of information, on the basis of which the determiner determines whether or not the acknowledgment message for confirming the successful transmission of one fragment frame is received, into a first status where no acknowledgement message is received and a second status where at least one of an incomplete acknowledgement message or an indication to start a retransmission of a fragment frame is received, wherein the distinguisher is further configured to stop the retransmission processing portion from initiating a retransmission the fragment frame in the first status, and to allow the retransmission processing portion to initiate a retransmission the fragment frame in the second status.