Method for transmitting physical layer protocol data unit and communication apparatus

A chip, comprising a processor and a memory, wherein the memory is configured to store a program or instructions, and when the program or the instructions are executed by the processor, the chip is enabled to perform the following operations:

• receiving, through an interface, a trigger frame that is from an access point AP and that is processed, wherein the trigger frame is used to trigger at least one station STA to transmit an uplink physical layer protocol data unit PPDU;
• and
• generating and outputting a PPDU based on the trigger frame, wherein
• the PPDU comprises a data field and long training fields LTFs used for channel estimation, the data field is carried on a distributed resource unit RU, the distributed RU comprises a plurality of subcarrier groups that are distributed in frequency domain, one subcarrier group comprises one subcarrier or comprises at least two continuous subcarriers, the LTFs are carried on all subcarriers in a first transmission bandwidth, and the first transmission bandwidth is a bandwidth corresponding to a distributed RU that is allocated by the AP to the at least one STA for transmitting the uplink PPDU.

A communication apparatus, comprising a processor, wherein the processor is coupled to a memory, the memory is configured to store a program or instructions, and when the program or the instructions are executed by the processor, the apparatus is enabled to:

• receive a trigger frame from an access point AP, wherein the trigger frame is used to trigger at least one STA comprising the STA to transmit an uplink physical layer protocol data unit PPDU;
• and
• send a PPDU to the AP based on the trigger frame, wherein
• the PPDU comprises a data field and long training fields LTFs used for channel estimation, the data field is carried on a distributed resource unit RU, the distributed RU comprises a plurality of subcarrier groups that are distributed in frequency domain, one subcarrier group comprises one subcarrier or comprises at least two continuous subcarriers, the LTFs are carried on all subcarriers in a first transmission bandwidth, and the first transmission bandwidth is a bandwidth corresponding to a distributed RU that is allocated by the AP to the at least one STA for transmitting the uplink PPDU.