Data communication apparatus, data transmission method, and computer system
Provided is a data communication apparatus which includes a transmission interval calculator configured to calculate an effective transfer speed of the data based on a difference between an actual arrival time at which response data to transmission data transmitted to the other data communication apparatus has arrived and a predictive arrival time calculated by multiplying the number of relay devices passed until the response data from the other data communication apparatus arrives at the data communication apparatus by a transfer delay time necessary to pass through one relay device and a buffer size of the relay device on a communication path of the data, and calculate a transmission interval of transmission data based on the effective transfer speed and a transmission controller configured to perform transmission control of transmission data based on the transmission interval. Thus, congestion control is efficiently implemented in an interconnection network configured as a regular network.