| CPC H04L 5/0044 (2013.01) [H04L 5/0078 (2013.01)] | 20 Claims |

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1. A data transmission method applied in a network device, comprising:
obtaining an initial transmission time of a Frequency Domain-Aggregated-Physical layer Protocol Data Unit (FD-A-PPDU) comprising at least two Multi-User (MU) PPDUs;
obtaining an initial number of A-PPDU padding symbols for each of the at least two MU PPDUs;
determining a first transmission time of the FD-A-PPDU and a first number of A-PPDU padding symbols for each of the at least two MU PPDUs based on the initial transmission time of the FD-A-PPDU and the initial number of A-PPDU padding symbols for each of the at least two MU PPDUs;
generating the FD-A-PPDU based on the first transmission time of the FD-A-PPDU and the first number of A-PPDU padding symbols for each of the at least two MU PPDUs; and
transmitting the generated FD-A-PPDU to a plurality of terminal devices.
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