Patent ID: 8132079

Claim:
A radio communication apparatus receiving a variable length packet data stored in the data part of a data unit having the data part and the header part, the radio communication apparatus comprising: an error detection calculation section performing error detection calculation for the packet data based on an error checking code included in the tail end portion of the packet data stored in a reception data unit; a detection section detecting the tail end position of the packet data in the data unit having the tail end of the packet data based on the calculation result of the error detection calculation; and a decision section deciding the validity of the tail end position detected by the detection section; wherein the header part comprises first flag information indicating whether or not the tail end of the packet data is present in the data part, and wherein the decision section decides that the tail end position detected by the detection section is valid, when the first flag information in the header part of the data unit, including the tail end position detected by the detection section, indicates the presence of the tail end.