A method, apparatus and computer program product are provided in order to enable operation of both cellular and WLAN on a shared unlicensed band. In this regard, a method is provided that includes causing a primary transmission mode period of operation, a secondary transmission mode period of operation, and an idle mode period of operation on an unlicensed frequency band to be transmitted to a mobile terminal. The method further includes receiving an interfered ratio report from the mobile terminal. The method also includes causing the mobile terminal to be classified as at least one of a primary user or a secondary user based on the interfered ratio report. The method also includes causing the classification to be transmitted to the mobile terminal.