Data Transmission Method and Apparatus

A method, comprising:

• determining, by a first receiving device of a plurality of receiving devices, a long training sequence set, wherein the long training sequence set comprises a plurality of long training sequences;
• determining a mapping relationship between each long training sequence in the long training sequence set and first sub-identity information in identity information of each receiving device of the plurality of receiving devices, wherein one piece of identity information is used to uniquely indicate one receiving device in the plurality of receiving devices, and the first sub-identity information is a part or all of the identity information;
• acquiring, in response to receiving a data packet transmitted by a transmitting device, a long training sequence symbol carried in a long training sequence field at a physical layer of the data packet, wherein the long training sequence symbol is used to indicate a target long training sequence, and the target long training sequence is selected by the transmitting device from the long training sequence set according to first sub-identity information of a target receiving device of the data packet and the mapping relationship;
• determining the target long training sequence according to the long training sequence symbol;
• and
• processing the data packet according to the target long training sequence.

An apparatus, comprising:

• a processor;
• a computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• determining a long training sequence set, wherein the long training sequence set comprises a plurality of long training sequences;
• and
• determining a mapping relationship between each long training sequence in the long training sequence set and first sub-identity information in identity information of each receiving device in a communications system, wherein one piece of identity information is used to uniquely indicate one receiving device in the communications system, and the first sub-identity information is a part or all of the identity information;
• selecting, in response to data needing to be transmitted to a target receiving device, a target long training sequence from the long training sequence set according to first sub-identity information of the target receiving device and the mapping relationship;
• performing encapsulation processing on the data according to the target long training sequence to generate a data packet, so as to carry, in a long training sequence field at a physical layer of the data packet, a long training sequence symbol used to indicate the target long training sequence;
• and
• a transmitter coupled to the processor and configured to send the data packet to the target receiving device, so that the target receiving device processes the data packet according to the target long training sequence after acquiring the target long training sequence from the data packet.

An apparatus, comprising:

• a receiver, configured to receive a data packet transmitted by a transmitter;
• a processor coupled to the receiver;
• a computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• determining a long training sequence set, wherein the long training sequence set comprises at least two long training sequences;
• determining a mapping relationship between each long training sequence in the long training sequence set and first sub-identity information in identity information of each receiving device in a communications system, wherein one piece of identity information is used to uniquely indicate one receiving device in the communications system, and the first sub-identity information is a part or all of the identity information;
• acquiring a long training sequence symbol carried in a long training sequence field at a physical layer of the data packet, wherein the long training sequence symbol is used to indicate a target long training sequence, and the target long training sequence is selected by the transmitter from the long training sequence set according to first sub-identity information of a target receiving device of the data packet and the mapping relationship;
• determining the target long training sequence according to the long training sequence symbol;
• and
• processing the data packet according to the target long training sequence.