Data transmission method and communications device

Patent metadata

Field	Value
Publication number	US-2016338115-A1
Application number	US-201615221241-A
Country	US
Kind code	A1
Filing date	Jul 27, 2016
Priority date	Jan 28, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

The present invention provides a data transmission method and a communications device. The communications device includes: a transceiver, configured to send a transmission frame to a second communications device, so that the second communications device acquires data information in the transmission frame, where the transmission frame includes a first part and a second part, the transceiver sends the first part of the transmission frame by using a first quantity of subcarriers, the transceiver sends the second part of the transmission frame by using a second quantity of subcarriers, and the first quantity is not equal to the second quantity; and the transceiver, further configured to perform a next time of information transmission with the second communications device. A throughput can be effectively increased.

First claim

What is claimed is:

1 . A communications device, comprising:
a transceiver, configured to send a transmission frame to a second communications device wherein the transmission frame comprises a first part and a second part, wherein the transceiver sends the first part of the transmission frame by using a first quantity of subcarriers, the transceiver sends the second part of the transmission frame by using a second quantity of subcarriers, and the first quantity is not equal to the second quantity; and wherein the transceiver is configured to perform a next time of information transmission with the second communications device.

2 . The communications device according to claim 1 , wherein the transceiver is configured to perform the next time of information transmission with the second communications device by using the second quantity of subcarriers.

3 . The communications device according to claim 2 , wherein transmission bandwidths used by the first part of the transmission frame and the second part of the transmission frame are equal, and and a spacing of the first quantity of subcarriers is not equal to a spacing of the second quantity of subcarriers.

4 . The communications device according to claim 2 , wherein a transmission bandwidth used by the first part of the transmission frame and a transmission bandwidth used by the second part of the transmission frame are not equal, and a spacing of the first quantity of subcarriers is equal to a spacing of the second quantity of subcarriers.

5 . The communications device according to claim 2 transmission bandwidths used by the first part of the transmission frame and the second part of the transmission frame are not equal, and an spacing of the first quantity of subcarriers is not equal to an spacing of the second quantity of subcarriers.

6 . The communications device according to claim 1 the first quantity is less than the second quantity, and the spacing of the first quantity of subcarriers is 312.5 kHz.

7 . The communications device according to claim 1 , 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, and the preamble part of the transmission frame carries information required for the second communications device to demodulate the second part of the transmission frame.

8 . The communications device according to claim 7 , wherein the preamble part of the transmission frame comprises a legacy short training (L-STF) field, a legacy long training (L-LTF) field, legacy signaling (L-SIG), and a high efficiency wireless local area network signaling (HEW-SIG), wherein the HEW-SIG carries the information required for the second communications device to demodulate the second part of the transmission frame.

9 . The communications device according to claim 8 , wherein the HEW-SIG carrying the information required for the second communications device to demodulate the second part of the transmission frame is specifically:
the HEW-SIG carries subcarrier quantity information used by the second part of the transmission frame and/or MCS information of the second part of the transmission frame.

10 . The communications device according to claim 7 , wherein the preamble part of the transmission frame comprises an L-STF, an L-LTF, and an L-SIG, wherein the L-SIG carries the information required for the second communications device to demodulate the second part of the transmission frame.

11 . The communications device according to claim 10 , wherein the L-SIG carrying the information required for the second communications device to demodulate the second part of the transmission frame is specifically:
the L-SIG carries subcarrier quantity information used by the second part of the transmission frame and/or MCS information of the second part of the transmission frame.

12 . The communications device according to claim 1 , wherein the data part of the transmission frame comprises control information and the data information, wherein the control information comprises at least one type of the following information: scheduling information, broadcast information, and system information.

13 . The communications device according to claim 12 , wherein the communications device is a wireless access point (AP), and the second communications device is at least one user station (STA).

14 . A communications device, comprising:
a transceiver, configured to receive a transmission frame sent by a first communications device, wherein the transmission frame comprises a first part and a second part, the first part of the transmission frame is sent by the first communications device by using a first quantity of subcarriers, the second part of the transmission frame is sent by the first communications device by using a second quantity of subcarriers, the transceiver receives the first part of the transmission frame by using Fourier transform of the first quantity, and the transceiver receives the second part of the transmission frame by using Fourier transform of the second quantity; and further configured to: after a processor acquires data information in the transmission frame, perform a next time of information transmission with the first communications device; and the processor, configured to acquire the data information in the transmission frame.

15 . The communications device according to claim 14 , wherein the communications device is a user station (STA), and the first communications device is a wireless access point (AP).

16 . A communications device, comprising:
a transceiver module, configured to send a transmission frame to a second communications device, so that the second communications device acquires data information in the transmission frame, wherein the transmission frame comprises a first part and a second part, the transceiver module sends the first part of the transmission frame by using a first quantity of subcarriers, the transceiver module sends the second part of the transmission frame by using a second quantity of subcarriers, and the first quantity is not equal to the second quantity; and the transceiver module, further configured to perform a next time of information transmission with the second communications device.

17 . The communications device according to claim 16 , wherein the transceiver module is specifically configured to perform the next time of information transmission with the second communications device by using the second quantity of subcarriers.

18 . The communications device according to claim 17 , wherein the first quantity being not equal to the second quantity comprises:
transmission bandwidths used by the first part of the transmission frame and the second part of the transmission frame are equal, and an spacing of the first quantity of subcarriers is not equal to an spacing of the second quantity of subcarriers.

19 . The communications device according to claim 17 , wherein the first quantity being not equal to the second quantity comprises:
a transmission bandwidth used by the first part of the transmission frame and a transmission bandwidth used by the second part of the transmission frame are not equal, and an spacing of the first quantity of subcarriers is equal to an spacing of the second quantity of subcarriers.

20 . The communications device according to claim 17 , wherein the first quantity being not equal to the second quantity comprises:
transmission bandwidths used by t

Assignees

• Huawei Tech Co Ltd

Inventors

• Liu Yalin
• Loc Peter
• Yang Xun
• Zhu Jun

Classifications

• H04W88/08

  Access point devices · CPC title

• H04W40/244

  using a network of reference devices, e.g. beaconing · CPC title

• H04W76/10 Primary

  Connection setup · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W72/04

  Wireless resource allocation · CPC title