Patent ID: 8538359

Claim:
A network system with power saving functions, comprising: a wireless network device, comprising: a radio frequency (RF) unit, for transmitting and receiving frames; and a first connection interface unit; a network control device, comprising: a second connection interface unit, wherein the second connection interface unit is coupled to the first connection interface unit via a transmission connection, for data transmission with the first connection interface unit; a first controller, for turning off power supplies of the first connection interface unit and the second connection interface unit when there is no data transmitted via the transmission connection; wherein in response to detecting a wake-up signal by a detecting unit in the network control device, the first controller restarts at least one of the power supplies of the first connection interface unit and the second connection interface unit previously in a turned off state; and a second controller, for resetting the first connection interface unit in response to receiving a reset signal, wherein in response to the wake-up signal, the first controller transmits the reset signal to the second connection interface unit and the second controller.