Abstract: The power consumption of a USB 3.0 hub is reduced, and the interconnection between the USB 3.0 hub and USB 3.0 devices is improved. On receiving a data transfer request packet, which is transferred by a DS port in a low power consumption state, from a host, an SS controller of an SS hub makes the DS port transmit an LFPS for returning a destination device of the data transfer request packet to U0 state, and transmits a transfer enable packet, which is generated by the SS controller itself and shows that the destination device has become ready to correspond to the data transfer, to the host after transmitting a transfer deferment packet to the host. The SS controller does not execute a process that is specified in USB 3.0, and in which a transfer deferment packet is transmitted to the destination device after the DS port return to U0 state.