L1/L2 control signaling in downlink is used to give user equipment sufficient information for demapping and decoding data correctly. Hence, design of L1/L2 control signaling is one of the important issues in the mobile communication system. The L1/L2 control signaling is designed to be suitable for transmission in the highly mobile environment while the overhead of L1/L2 control signaling is low to get high data rate. In this paper, the issues about design of L1/L2 control signaling in the 3GPP conference will be discussed.