Data transmission method and communications device
The present disclosure relates to data transmission methods and communications devices. One example communications device includes a transceiver. The transceiver is configured to send a transmission frame to a second communications device, where the second communications device acquires data information in the transmission frame, and the transmission frame includes a first part and a second part. The transceiver is configured to send the first part of the transmission frame by using a first quantity of subcarriers. The transceiver is configured to send the second part of the transmission frame by using a second quantity of subcarriers, where the first quantity is not equal to the second quantity. The transceiver is further configured to perform a next time of information transmission with the second communications device.
1. A non-transitory computer-readable medium storing one or more instructions executable by a first communication device to perform operations comprising:
sending a transmission frame to a second communication device, wherein the transmission frame comprises a first part and a second part, wherein the first part of the transmission frame comprises a preamble part of the transmission frame, the second part of the transmission frame comprises a data part of the transmission frame, the data part of the transmission frame comprises control information and data information, the control information comprises scheduling information, wherein the preamble part of the transmission frame carries information for the second communication device to demodulate the second part of the transmission frame, wherein the preamble part of the transmission frame comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), legacy signaling (L-SIG), and a high efficiency wireless local area network signaling (HEW-SIG), and wherein the HEW-SIG carries the information for the second communication device to demodulate the second part of the transmission frame, wherein
the first part of the transmission frame is sent by using a first quantity of subcarriers,
the second part of the transmission frame is sent by using a second quantity of subcarriers, wherein the first quantity is not equal to the second quantity, and wherein transmission bandwidth used by the first part and transmission bandwidth used by the second part are equal, a spacing of the first quantity of subcarriers is greater than a spacing of the second quantity of subcarriers, and the spacing of the first quantity of subcarriers is 312.5 kHz.
2. The non-transitory computer-readable medium according to claim 1 , wherein the information for the second communication device to demodulate the second part of the transmission frame comprises at least one of subcarrier quantity information used by the second part of the transmission frame or Modulation and Coding Scheme (MCS) information of the second part of the transmission frame.
3. A non-transitory computer-readable medium storing one or more instructions executable by a second communication device to perform operations comprising:
receiving a transmission frame from a first communication device, wherein the transmission frame comprises a first part and a second part, wherein the first part of the transmission frame comprises a preamble part of the transmission frame, the second part of the transmission frame comprises a data part of the transmission frame, the data part of the transmission frame comprises control information and data information, the control information comprises scheduling information, wherein the preamble part of the transmission frame carries information for the second communication device to demodulate the second part of the transmission frame, wherein the preamble part of the transmission frame comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), legacy signaling (L-SIG), and a high efficiency wireless local area network signaling (HEW-SIG), wherein the HEW-SIG carries the information for the second communication device to demodulate the second part of the transmission frame, wherein the first part of the transmission frame is sent by using a first quantity of subcarriers and the second part of the transmission frame is sent by using a second quantity of subcarriers, and wherein transmission bandwidth used by the first part and transmission bandwidth used by the second part are equal, a spacing of the first quantity of subcarriers is greater than a spacing of the second quantity of subcarriers, and the spacing of the first quantity of subcarriers is 312.5 kHz.
4. The non-transitory computer-readable medium according to claim 3 , wherein the information for the second communication device to demodulate the second part of the transmission frame comprises at least one of subcarrier quantity information used by the second part of the transmission frame or Modulation and Coding Scheme (MCS) information of the second part of the transmission frame.
5. A computer-implemented system, comprising:
one or more processors; and
one or more computer memory devices interoperably coupled with the one or more processors and having tangible, non-transitory, machine-readable media storing one or more instructions for execution by the one or more processors to perform operations comprising:
sending a transmission frame to a communication device, wherein the transmission frame comprises a first part and a second part, wherein the first part of the transmission frame comprises a preamble part of the transmission frame, the second part of the transmission frame comprises a data part of the transmission frame, the data part of the transmission frame comprises control information and data information, the control information comprises scheduling information, wherein the preamble part of the transmission frame carries information for the communication device to demodulate the second part of the transmission frame, wherein the preamble part of the transmission frame comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), legacy signaling (L-SIG), and a high efficiency wireless local area network signaling (HEW-SIG), wherein the HEW-SIG carries the information for the communication device to demodulate the second part of the transmission frame, wherein the first part of the transmission frame is sent by using a first quantity of subcarriers, the second part of the transmission frame is sent by using a second quantity of subcarriers, wherein the first quantity is not equal to the second quantity, and wherein transmission bandwidth used by the first part and transmission bandwidth used by the second part are equal, a spacing of the first quantity of subcarriers is greater than a spacing of the second quantity of subcarriers, and the spacing of the first quantity of subcarriers is 312.5 kHz.
6. The computer-implemented system according to claim 5 , wherein the information for the communication device to demodulate the second part of the transmission frame comprises at least one of subcarrier quantity information used by the second part of the transmission frame or Modulation and Coding Scheme (MCS) information of the second part of the transmission frame.
7. A computer-implemented system, comprising:
one or more processors; and
one or more computer memory devices interoperably coupled with the one or more processors and having tangible, non-transitory, machine-readable media storing one or more instructions for execution by the one or more processors to perform operations comprising:
receiving a transmission frame from a first communication device, wherein the transmission frame comprises a first part and a second part, wherein the first part of the transmission frame comprises a preamble part of the transmission frame, the second part of the transmission frame comprises a data part of the transmission frame, the data part of the transmission frame comprises control information and data information, the control information comprises scheduling information, wherein the preamble part of the transmission frame carries information for a second communication device to demodulate the second part of the transmission frame, wherein the preamble part of the transmission frame comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), legacy signaling (L-SIG), and a high efficiency wireless local area network signaling (HEW-SIG), wherein the HEW-SIG carries the information for the second communication device to demodulate the second part of the transmission frame, wherein the first part of the transmission frame is sent by using a first quantity of subcarriers and the second part of the transmission frame is sent by using a second quantity of subcarriers, and wherein transmission bandwidth used by the first part and transmission bandwidth used by the second part are equal, a spacing of the first quantity of subcarriers is greater than a spacing of the second quantity of subcarriers, and the spacing of the first quantity of subcarriers is 312.5 kHz.
8. The computer-implemented system according to claim 7 , wherein the information for the second communication device to demodulate the second part of the transmission frame comprises at least one of subcarrier quantity information used by the second part of the transmission frame or Modulation and Coding Scheme (MCS) information of the second part of the transmission frame.