Patent ID: 8923261

Claim:
A method of transmitting a frame in a wireless local area network, the method comprising: generating a legacy short training field (STF) used for at least one receiver to estimate an automatic gain control and a coarse frequency offset; generating a legacy long training field (LTF) used for the at least one receiver to estimate a fine frequency offset; generating a first Very High Throughput (VHT) control field including common control information common to each receiver; generating a VHT STF used for improving automatic gain control estimation in a wireless transmission; generating a VHT LTF used for estimating a wireless channel; generating a second VHT control field including specific control information specific to each receiver; generating the frame sequentially including the legacy STF, the legacy LTF, the first VHT control field, the VHT STF, the VHT LTF, the second VHT control field, and a data field; and transmitting the frame to the at least one receiver, wherein the specific control information includes information indicating a length of the data field.