Patent ID: 8160505

Claim:
A wireless communication apparatus comprising: a transmitting portion to transmit a data signal to other wireless communication apparatus; a receiving portion to receive a reception confirmation signal indicating reception of the data signal by the other wireless communication apparatus from the other wireless communication apparatus during a specified period; a storage portion to store a reception success rate of the reception confirmation signal by the receiving portion and a plurality of conditions; a setting portion to retrieve the reception success rate and the conditions from the storage portion, the setting portion to select and set a predetermined requirement from the conditions based on the reception success rate; a determination portion to determine that the predetermined requirement is satisfied if the receiving portion receives a given signal during the specified period; a control portion to control the transmitting portion to request the other wireless communication apparatus to retransmit the reception confirmation signal if the receiving portion does not normally receive the reception confirmation signal and the determination portion determines that the predetermined requirement is satisfied; and wherein the retransmit request includes a different data format then the data signal.