Data communication method and related apparatus

Patent metadata

Field	Value
Publication number	US-10833828-B2
Application number	US-201715468593-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Sep 25, 2014
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A data communication method and a related apparatus are provided, and the data communication method includes: constructing, by an access device, a beacon frame, where the beacon frame includes a newly added field, and the newly added field represents multiple data guard interval lengths supported by the access device; and broadcasting, by the access device, the beacon frame, so that a terminal selects an available guard interval length matching a data guard interval length supported by the terminal from the beacon frame, and performs data communication with the access device by using the available guard interval length. By using the present invention, data communication between the access device and the terminal can be implemented when the access device supports multiple data guard interval lengths.

First claim

What is claimed is:

1. A data communication method, comprising:
constructing a beacon frame by an access device, the beacon frame including a high efficiency (HE) capability element, the HE capability element including a field indicating whether each of multiple guard interval lengths is supported by the access device, and the field including multiple indicator bits, one indicator bit in the multiple indicator bits indicating whether the access device supports one guard interval length in the multiple guard interval lengths;
a first bit in the multiple indicator bits corresponds to a 3.2 us guard interval length and indicates whether the access device supports the 3.2 us guard interval length or not;
a second bit in the multiple indicator bits corresponds to a 0.8 us guard interval length and indicates whether the access device supports the 0.8 us guard interval length or not;
encapsulating, by the access device, the beacon frame into a data unit; the data unit including a legacy preamble and bearer data, and the bearer data including the beacon frame;
sending the data unit by the access device; and
performing data communication with a terminal by using an available guard interval length which is selected from the multiple guard interval lengths and is supported by the access device and the terminal.

2. The method according to claim 1 , wherein
a guard interval length of the legacy preamble is a first alternative guard interval length supported by the access device in a first standard, and a guard interval length of the bearer data is a second alternative guard interval length supported by the access device in a second standard.

3. The method according to claim 1 , wherein a value of the one indicator bit being 1 indicates that the access device supports the one guard interval length; and the value of the one indicator bit being 0 indicates that the access device does not support the one guard interval length.

4. The method according to claim 2 , wherein the second alternative guard interval length is a maximum guard interval length supported by the access device in the second standard.

5. The method according to claim 4 , wherein the second standard is 802.11ax and the second alternative guard interval length is 3.2 us.

6. The method according to claim 2 , wherein the first alternative guard interval length is a maximum guard interval length supported by the access device in the first standard.

7. The method according to claim 6 , wherein the first alternative guard interval length is 0.8 us.

8. A data communication method, comprising:
obtaining, by a terminal, a data unit from an access device, the data unit including a legacy preamble and bearer data, the bearer data including a beacon frame, the beacon frame including a high efficiency (HE) capability element, the HE capability element including a field indicating whether each of multiple guard interval lengths is supported by the access device, and the field including multiple indicator bits, one indicator bit in the multiple indicator bits indicating whether the access device supports one guard interval length in the multiple guard interval lengths;
a first bit in the multiple indicator bits corresponds to a 3.2 us guard interval length and indicates whether the access device supports the 3.2 us guard interval length or not;
a second bit in the multiple indicator bits corresponds to a 0.8 us guard interval length and indicates whether the access device supports the 0.8 us guard interval length or not;
selecting, by the terminal, an available guard interval length supported by the terminal and supported by the access device from the multiple guard interval lengths; and
performing, by the terminal, data communication with the access device by using the available guard interval length.

9. The method according to claim 8 , wherein a value of the one indicator bit being 1 indicates that the access device supports the one guard interval length; and the value of the one indicator bit being 0 indicates that the access device does not support the one guard interval length.

10. The method according to claim 8 , wherein a guard interval length of the legacy preamble is a first alternative guard interval length supported by the access device in a first standard, and a guard interval length of the bearer data is a second alternative guard interval length supported by the access device in a second standard.

11. An apparatus, comprising:
a processor; and
a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions, which when executed by the processor, cause the apparatus to:
construct a beacon frame, wherein the beacon frame includes a high efficiency (HE) capability element, the HE capability element includes a field indicating whether each of multiple guard interval lengths is supported by the apparatus; and the field includes multiple indicator bits, one indicator bit in the multiple indicator bits indicating whether the apparatus supports one guard interval length in the multiple guard interval lengths;
a first bit in the multiple indicator bits corresponds to a 3.2 us guard interval length and indicates whether the apparatus supports the 3.2 us guard interval length or not;
a second bit in the multiple indicator bits corresponds to a 0.8 us guard interval length and indicates whether the apparatus supports the 0.8 us guard interval length or not;
encapsulate the beacon frame into a data unit, wherein the data unit includes a legacy preamble and bearer data, and the bearer data includes the beacon frame; and
send the data unit and perform data communication with a terminal by using an available guard interval length which is selected from the multiple guard interval lengths and is supported by the apparatus and the terminal.

12. The apparatus according to claim 11 , wherein a guard interval length of the legacy preamble is a first alternative guard interval length supported by the apparatus in a first standard, and a guard interval length of the bearer data is a second alternative guard interval length supported by the apparatus in a second standard.

13. The apparatus according to claim 11 , wherein a value of the one indicator bit being 1 indicates that the apparatus supports the one guard interval length; and the value of the one indicator bit being 0 indicates that the apparatus does not support the one guard interval length.

14. The apparatus according to claim 12 , wherein the second alternative guard interval length is a maximum guard interval length supported by the apparatus in the second standard.

15. The apparatus according to claim 14 , wherein the second standard is 802.11ax and the second alternative guard interval length is 3.2 us.

16. The apparatus according to claim 12 , wherein the first alternative guard interval length is a maximum guard interval length supported by the apparatus in the first standard.

17. The apparatus according to claim 16 , wherein the first alternative guard interval length is 0.8 us.

18. A terminal, comprising:
a processor; and
a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions, which when executed by the processor, cause the terminal to:
select an available guard interval length supported by the terminal and supported by an access device from multiple guard interval lengths;
obtain a data unit from the access device, wherein the data unit includes a legacy preamble and bearer data, the bearer data includes a beacon frame, wherein the beacon f

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Ningjuan
• Xue Xin
• Yan Min
• Yu Jian

Classifications

• H04W48/08

  Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) · CPC title

• H04W56/005

  compensating for timing error by adjustment in the receiver · CPC title

• H04L27/2613

  Structure of the reference signals · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title