COMMUNICATION SYSTEM AND COMMUNICATION METHOD

An object of the present invention is to perform long-distance TCP/IP transfer at a high throughput and in a short period of time. According to the present invention, in a communication system in which transmission data is transferred using a transmission-side TCP device and a receiving-side TCP device, the transmission-side TCP device includes a plurality of first IP processing units, a plurality of first TCP processing units, a plurality of compression processing units, a plurality of second TCP processing units, and a plurality of second IP processing units. The receiving-side TCP device includes a plurality of third IP processing units, a plurality of third TCP processing units, a plurality of decompression processing units, a plurality of fourth TCP processing units, and a plurality of fourth IP processing units. The respective units perform processing independently of and in parallel with each other.