Patent ID: 8532111

Claim:
A transmission apparatus comprising: receiving means for receiving ACK packets transmitted from a reception apparatus in response to transmission data items; ACK (Acknowledgement) storing means for storing a latest ACK packet which is last received among the ACK packets for a predetermined period of time; and TCP/IP (Transmission Control Protocol/Internet Protocol) processing means for performing processing of receiving an ACK packet in accordance with the latest ACK packet supplied from the ACK storing means at the expiration of the predetermined period of time, wherein the latest ACK packet which is last received from among the received ACK packets is transferred to the TCP/IP processing means without storing the latest ACK packet in the ACK storing means upon determination that a function for storing the received ACK packets is disabled, wherein, in a case where the ACK storing means receives an ACK packet that is not consecutive to the packet which has been stored as the latest ACK packet in the ACK storing means, the ACK storing means supplies the latest ACK packet to the TCP/IP processing means when a period of time for which the latest ACK packet is stored in the ACK storing means exceeds a predetermined period of time or when the number of the stored ACK packets reaches the maximum number of ACK packets to be stored.