US Patent 10257778 Wireless communication system, base station, and terminal

A wireless communication system includes a terminal configured to perform wireless communication concurrently using a cell of a first type enabling connection without association with another cell and a cell of a second type enabling connection by being associated with the cell of the first type; and a base station configured to form a first cell of the second type and when detecting that the terminal selects the first cell for the cell of the first type, the base station notifies the terminal of a second cell of the first type different from the first cell so as to allow the terminal to change connection to the second cell.