Patent ID: 9743412
Date: 2017-08-22
CPC Classifications: H04W

Claim:
1. A wireless communication system that performs wireless communication between a base station and a terminal station, using a white space, the wireless communication system comprising: a base station configured to: a terminal station configured to: create and store a terminal station free channel list as information on available channels, and wherein, the terminal station includes a first extremely low power radio so that transmitting power of the first extremely low power radio prevents interference on an existing wireless system having a license to use assigned frequencies, in response to the terminal station receiving a downlink signal from the base station upon establishment of synchronization, the terminal station is configured to transmit an uplink signal including at least the location information of the terminal station and the terminal station free channel list to the base station, by extremely low power wireless communication using the first extremely low power radio, and wherein, the base station includes a second extremely low power radio so that transmitting power of the second extremely low power radio prevents interference on an existing wireless system having a license to use assigned frequencies, in response to the base station receiving the uplink signal from the terminal station by extremely low power wireless communication using the second extremely low power radio, the base station is configured to: calculate a distance between the base station and the terminal station based on the location information of the terminal station included in the received uplink signal and the location information of the base station, determine an uplink transmission power of the terminal station based on the calculated distance, compare the terminal station free channel list with the base station free channel list, in response to a common free channel between the terminal station free channel list and the base station free channel list, determine the common free channel as an uplink channel and a downlink channel, and in response to no common free channel, determine an uplink channel and a downlink channel as different channels.