A method for data transmission on control channels from a Base Station (BS) to a User Equipment (UE) in a wireless communication system is disclosed. The method includes multiplexing a common control channel and a UE-specific control channel for the UE using at least one of time division multiplexing and frequency division multiplexing; and performing data transmission on the multiplexed common control channel and the UE-specific control channel to the UE. The UE-specific control channel is multiplexed with one or more UE-specific control channels for other UEs using at least one of time division multiplexing, frequency division multiplexing, spatial multiplexing, and code division multiplexing.