Patent ID: 8879490

Claim:
A method of transmitting a multiple input multiple output (MIMO) packet in a wireless local area network system, the method performed by a transmitting station and comprising: generating a MIMO packet including at least one spatial stream and first control information; and transmitting the MIMO packet to at least one receiving station, wherein the MIMO packet is transmitted to a single receiving station if the MIMO packet is generated based on a single user (SU)-MIMO scheme, and the MIMO packet is transmitted to a plurality of receiving stations if the MIMO packet is generated based on a multi user (MU)-MIMO scheme, wherein the first control information includes a first field indicating a group ID of the at least one receiving station and further indicating whether the MIMO packet is generated based on the SU-MIMO scheme or the MU-MIMO scheme, wherein the first control information includes a second field, and wherein content of the second field is determined based on whether the MIMO packet is generated based on the SU-MIMO scheme or the MU-MIMO scheme, the second field indicates a modulation and coding scheme (MCS) index used for the MIMO packet if the MIMO packet is generated based on the SU-MIMO scheme, and the second field indicates an encoding scheme applied to the at least one receiving station if the MIMO packet is generated based on the MU-MIMO scheme.