Patent ID: 7936735

Claim:
A radio communication apparatus for receiving variable length Radio Link Control (RLC) sub-PDU data in an RLC layer belonging to a layer 2 constituting a protocol layer of radio communication and for assembling one RLC PDU data from a plurality of RLC sub-PDU data, comprising: a buffer memory; and a controller for referring to retransmission identification information for identifying between a first retransmission and a second retransmission included in a header of received RLC sub-PDU data, stores into the buffer memory, the RLC sub-PDU data having the retransmission identification information identical to a preset assumed value, and for assembling the RLC PDU data from the RLC sub-PDU data having the identical retransmission identification information; wherein the controller changes the assumed value whenever transmitting a retransmission request for the RLC sub-PDU data corresponding to a predetermined RLC PDU data; wherein the retransmission identification information is the number of times of retransmission, and the controller increments the assumed value by a predetermined unit value whenever transmitting the retransmission request for the RLC sub-PDU data corresponding to the predetermined RLC PDU data.