The accuracy of a connection is improved by avoiding unnecessary communication. A peripheral obtains an address from a central and saves the address. The peripheral transmits an advertisement including an address of a central which is a connection target. The central stores a history of its own addresses. The central receives the advertisement transmitted from the peripheral. The central determines whether the received advertisement includes any address in the history. If the central determines that the advertisement includes any address in the history, the central transmits to the peripheral a connection request signal for making a connection request.