Data transmission method, device, and system

A data transmission method, comprising:

• receiving, by a receiving device, on a pre-configured time-frequency resource, sent data and a time synchronization code that are sent by a sending device, wherein the sent data includes identifier information of the sending device, wherein the time-frequency resource is the same as a first time-frequency resource that is selected by the sending device from multiple time-frequency resources that are preconfigured in the sending device;
• invoking, by the receiving device, according to pre-configured interleaver information, an interleaver corresponding to the received time synchronization code to de-interleave the sent data, wherein the interleaver information comprises a correspondence between a plurality of interleavers and a plurality of time synchronization codes, and there is a one-to-one correspondence between each one of the plurality of time synchronization codes and a respective one of the plurality of interleavers, and the invoked interleaver is the respective one of the plurality of the plurality of interleavers in one-to-one correspondence with the received time synchronization code;
• and
• determining, by the receiving device, the sending device corresponding to the sent data.

A sending device, comprising:

• a processor, a memory configured to store program code, a transmitter and a bus, wherein the processor, the memory, and the transmitter are configured to communicate with each other by using the bus;
• and
• wherein the processor is configured to:
• acquire interleaver information that is to be used by to-be-sent data, wherein the interleaver information comprises a correspondence between a plurality of interleavers and a plurality of time synchronization codes, and there is a one-to-one correspondence between each one of the plurality of time synchronization codes and a respective one of the plurality of interleavers;
• select a first time-frequency resource from multiple time-frequency resources that are preconfigured in the sending device;
• acquire the to-be-sent data, wherein the to-be-sent data includes identifier information of the sending device;
• select a time synchronization code from the plurality of time synchronization codes;
• perform interleaving processing on the to-be-sent data by using the respective one of the plurality of interleavers in one-to-one correspondence with the selected time synchronization code;
• and
• send, using the transmitter, the interleaved to-be-sent data and the selected time synchronization code to a receiving device on the first time-frequency resource.

A receiving device, comprising:

• a processor, a memory configured to store program code, a receiver and a bus, wherein the processor, the memory, and the receiver are configured to communicate with each other by using the bus;
• wherein the receiver is configured to receive, on a pre-configured time-frequency resource, sent data and a time synchronization code that are sent by a sending device, wherein the sent data includes identifier information of the sending device, wherein the time-frequency resource is the same as a first time-frequency resource that is selected by the sending device from multiple time-frequency resources that are preconfigured in the sending device;
• wherein the processor is configured to invoke, according to pre-configured interleaver information, an interleaver corresponding to the received time synchronization code to de-interleave the sent data, wherein the interleaver information comprises a correspondence between a plurality of interleavers and a plurality of time synchronization codes, and there is a one-to-one correspondence between each one of the plurality of time synchronization codes and a respective one of the plurality of interleavers, and the invoked interleaver is the respective one of the plurality of the plurality of interleavers in one-to-one correspondence with the received time synchronization code;
• and
• the processor is configured to determine the sending device corresponding to the sent data.