A backlight, a backlight assembly and a liquid crystal display having the same, the backlight including a substrate with a plurality of wiring provided thereon, a plurality of LED modules disposed on the substrate and at least one color sensor disposed on the substrate. The system includes a combustion chamber having an input port for supplying a predetermined air-fuel mixture to the combustion chamber. The technical solution provided by the disclosure can reduce the frequency for the positioned terminal to report the positioning data and also save network data traffic for the user. If the SS is connected to a serving BS, the serving BS will request the interfering BS to perform or terminate interference mitigation on behalf of the SS if certain conditions are satisfied.