A semiconductor device comprises an active region having an upper portion and a sidewall portion which are protruded from the top surface of a device isolation region, and a silicide film disposed in the upper portion and the sidewall portion of the active region, thereby effectively reducing resistance in a sourcedrain region of the semiconductor device. The methods and apparatuses enable faster and more efficient VSP surveys than previous techniques. If the determined pilot channel is not currently being used by the mobile station, then the base station starts to transmit the determined pilot channel signals to the mobile station and receives a confirmation from the mobile station confirming their use.