Coexistent channel access method

A device configured to transmit a data packet in a wireless local area network, the device comprising:

• a processor;
• and
• a memory operatively coupled with the processor and storing instructions that, when executed by the processor, causes the device to:
• generate a physical layer protocol data unit (PPDU) indicating that the PPDU is to be transmitted to a plurality of receivers, wherein the PPDU includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), a legacy-signal field (L-SIG), a first signal field, a second signal field and a plurality of data streams, and
• transmit the PPDU to the plurality of receivers through a plurality of subchannels,
• wherein the first signal field includes bandwidth information indicating an entire bandwidth for all of the plurality of subchannels, and
• wherein the second signal field includes stream information and subchannel information, the subchannel information indicates at least one of the plurality of subchannels through which a corresponding data stream assigned to each of the plurality of receivers is transmitted, and the stream information indicates at least one of the plurality of data streams in at least one subchannel assigned to each of the plurality of receivers.