Apparatus and method for supporting communication by using multiple layers in wireless local area network system

A wireless communication method of an apparatus, the wireless communication method comprising:

• determining, based on a first modulation and coding scheme (MCS) of a first subchannel from among a plurality of subchannels configuring a bandwidth channel and based on a second MCS of a second subchannel of the plurality of subchannels, a multi-layer transmission mode of transmitting data to a single user, the second MCS being different from the first MCS, the second subchannel being different from the first subchannel;
• generating a first field indicating that the wireless communication method is based on the multi-layer transmission mode;
• generating a second field indicating first resource unit (RU) information of the first subchannel, second RU information of the second subchannel, the first MCS, and the second MCS;
• generating a physical protocol data unit (PPDU) comprising the first field and the second field;
• and
• transmitting the PPDU to an external device.

A wireless communication method of an apparatus, the wireless communication method comprising:

• receiving a physical protocol data unit (PPDU) from an external device;
• identifying that the PPDU is transmitted according to a multi-layer transmission mode, based on a first field in the PPDU, wherein the multi-layer transmission mode corresponds to a mode of transmitting data to a single user, based on a first modulation and coding scheme (MCS) of a first subchannel from among a plurality of subchannels configuring a bandwidth channel and based on a second MCS of a second subchannel of the plurality of subchannels, the second MCS being different from the first MCS, the second subchannel being different from the first subchannel;
• identifying, based on a second field in the PPDU, a distribution of the first subchannel and the second subchannel in a bandwidth, the first MCS, and the second MCS;
• and
• decoding the PPDU, based on the distribution of the first subchannel and the second subchannel, the first MCS, and the second MCS.