Patent Document ID: 9912455
Application ID: 14955254
Patent Flag: 1

Claim One:
1. A data transmission method, wherein the method comprises: determining, by a transmitting device, a long training sequence set, wherein the long training sequence set comprises at least two long training sequences; determining at least one receiving device set, wherein the at least one receiving device set comprises at least one receiving device in a communications system; determining a first mapping relationship, wherein the first mapping relationship is a mapping relationship between at least one set-use long training sequence in the long training sequence set and the at least one receiving device set, and the at least one set-use long training sequence corresponds to the at least one receiving device set on a one-to-one basis; determining, when a first data needs to be transmitted to a target receiving device set, a target set-use long training sequence according to the target receiving device set and the first mapping relationship; performing encapsulation processing on the first data according to the target set-use long training sequence to generate a first data packet, so that a long training sequence field in a physical layer of the first data packet carries a first long training sequence symbol that indicates the target set-use long training sequence; and transmitting the first data packet, to enable, after a receiving device receives the first data packet and acquires the target set-use long training sequence from the first data packet, the receiving device to process the data packet according to the target set-use long training sequence, and wherein the method further comprises: determining a second mapping relationship, wherein the second mapping relationship is a mapping relationship between each long training sequence in a long training sequence subset and first sub-identity information in identity information of each receiving device in the communications system, wherein one piece of the identity information uniquely indicates one receiving device in the communications system, the first sub-identity information is a part or all of the identity information, the long training sequence subset belongs to the long training sequence set, and the long training sequence subset does not comprise the set-use long training sequence; selecting, when second data needs to be transmitted to a target receiving device, a target long training sequence from the long training sequence subset according to first sub-identity information of the target receiving device and the second mapping relationship; performing encapsulation processing on the second data according to the target long training sequence to generate a second data packet, so that a long training sequence field in a physical layer of the second data packet carries a second long training sequence symbol that indicates the target long training sequence; and transmitting the second data packet, to enable the target receiving device to acquire the target long training sequence from the second data packet and process the second data packet according to the target long training sequence.