Data communication device and data communication method

摘要

In the case that a plurality of nodes determines a transmission speed prior to point-to-point communication, in order for minimizing a throughput difference between a node with a high transmission speed determined and a node with a low transmission speed determined, the transmission speed recording section 11 of a slave node 1 records a best transmission speed (a maximum transmission speed) for the slave node 1, the transmission speed setting section 12 determines the transmission speed upon negotiation with the master node when starting data transmission, the transmission speed setting section 12 sets a control transmission speed which is the same as or lower than a determined transmission speed based upon the maximum transmission speed and the determined transmission speed. The transmission speed controlling section 13 controls the transmission speed by using a buffer storage 14 so as not to exceed the control transmission speed set by the transmission speed setting section 12.