1. A method for mapping a user equipment (UE) uplink (UL) acknowledgement (ACK) location based upon a downlink (DL) resource allocation in a wireless data packet communication system, comprising: dynamically scheduling the UE by a resource allocation of at least one DL virtual resource block (VRB); and receiving a UL ACK Identifier (ID) implicitly mapped to a corresponding cyclically shifted sequence for a dynamically scheduled UE.