Activating and deactivating secondary carrier for communication in combination with anchor carrier

Disclosed is an apparatus for wireless communication. The apparatus comprises means for exchanging a lower layer order to activate or de-activate a secondary carrier for a user equipment (UE), wherein the lower layer order comprises a first Shared Control Channel for HS-DSCH (HS-SCCH) order sent by a Node B to the UE. The apparatus also comprises means for communicating on only an anchor carrier if the lower layer order deactivates the secondary carrier; means for communicating on the anchor carrier and the secondary carrier if the lower layer order activates the secondary carrier; means for exchanging a second HS-SCCH order to activate or de-activate HS-SCCH-Iess operation at the UE; and means for exchanging data without signalling if the second HS-SCCH order activates HS-SCCH-less operation.