PROCESSING METHOD OF A TCP RETRANSMISSION IN A TCP/IP OFFLOAD ENGINE WITHOUT A HOST INTERVENTION

摘要

A processing method of a TCP(Transmission Control Protocol) retransmission in a TOE(TCP/IP Offload Engine) without intervention of a host computer is provided to reduce a load of a system generated by retransmission and increase of transmission information by removing intervention of a host computer. A computer network protocol process is started in a TOE(54) driver region. When a retransmission request of a TCP is generated, data from a user memory is packetized with a prototype header, and is transmitted to a network. The data for retransmission is accessed to a TOE internal memory. A first step and a second step perform a DMA(Direct Memory Access) for packet transmission and retransmission through a round robin mode at the same time, and perform a TCP retransmission process without intervention of a host computer.