FRAME TRANSMITTING METHOD AND FRAME RECEIVING METHOD

• US 20160014725A1
• Filed: 07/02/2015
• Published: 01/14/2016
• Est. Priority Date: 07/04/2014
• Status: Active Grant

• Current Assignee: Atlas Global Technologies LLC (Acacia Research Corporation)
• Original Assignee: Newracom Inc.
• Inventors: YU, Heejung, CHEONG, Minho, KWON, Hyoungjin
• Granted Patent: US 10,085,258 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method of transmitting a frame is provided by a first device in a WLAN. The first device transmits a first frame including bandwidth information of a first channel to a second device and performs a communication with the second device through the first channel. The first channel is selected from among a plurality of channels into which an entire channel width is divided. Discontinuous channels are capable of being selected as the first channel from among the plurality of channels.

Claims

1. A method of transmitting a frame by a first device in a wireless local area network, the method comprising:

transmitting a first frame including bandwidth information of a first channel to a second device, the first channel being selected from among a plurality of channels into which an entire channel width is divided and discontinuous channels capable of being selected as the first channel from among the plurality of channels; and

performing a communication with the second device through the first channel.

2. The method of claim 1, further comprising receiving a second frame including bandwidth information of a second channel from the second device before transmitting the first frame, the second channel being selected from among the plurality of channels,

wherein transmitting the first frame includes selecting the first channel from the second channel.

3. The method of claim 2, wherein receiving the second frame includes receiving the second frame on the plurality of channels.

4. The method of claim 2, wherein receiving the second frame includes receiving the second frame only on the second channel.

5. The method of claim 1, wherein transmitting the first frame includes transmitting the first frame on the plurality of channels.

6. The method of claim 1, wherein transmitting the first frame includes transmitting the first frame only on the first channel.

7. The method of claim 1, wherein a transmission is performed through a second channel between a third device and a fourth device when the first frame is transmitted, and the second channel is a part of the plurality of channels and does not include the first channel.

8. The method of claim 7, further comprising matching an end time of a transmission through the first channel to an end time of a transmission through the second channel.

9. The method of claim 7, further comprising, when a transmission through the second channel ends and a new transmission through the second channel starts while a transmission through the first channel is performed, aligning an end time of the transmission through the first channel to be matched to an end time of the new transmission through the second channel.

10. The method of claim 1, further comprising:

setting a first network allocation vector (NAV) by a transmission through the first channel at a third device after the communication with the second device is completed; and

setting a second NAV by a transmission through a second channel that is a part of the plurality of channels and does not include the first channel.

11. The method of claim 10, further comprising:

when any one of the first NAV and the second NAV is expired, acquiring a transmission opportunity (TXOP) through a channel of the expired NAV; and

aligning TXOP duration of a transmission through the channel of the expired NAV with TXOP duration of a channel of unexpired NAV.

12. The method of claim 1, wherein the first frame includes a legacy short training field, a legacy long training field, a legacy signal field, and a data field of a legacy frame format, and

wherein the bandwidth information is allocated to additional data subcarriers that are some of subcarriers which are not set as data subcarriers at the legacy frame format in at least one field of the legacy short training field, the legacy long training field, the legacy signal field and the data field.

13. The method of claim 12, wherein the at least one field includes the data field.

14. The method of claim 13, wherein the at least one field further includes the legacy signal field.

15. A method of receiving a frame by a first device in a wireless local area network, the method comprising:

receiving a first frame including bandwidth information of a first channel from a second device, the first channel being selected from among a plurality of channels into which an entire channel width is divided and discontinuous channels capable of being selected as the first channel from among the plurality of channels; and

performing a communication with the second device through the first channel.

16. The method of claim 15, further comprising transmitting a second frame including bandwidth information of a second channel to the second device before receiving the first frame, the second channel being selected from among the plurality of channels,

wherein the first channel is selected from the second channel.

17. The method of claim 16, wherein transmitting the second frame includes transmitting the second frame on the plurality of channels.

18. The method of claim 16, wherein transmitting the second frame includes transmitting the second frame only on the second channel.

19. The method of claim 15, wherein receiving the first frame includes receiving the first frame on the plurality of channels.

20. The method of claim 15, wherein receiving the first frame includes receiving the first frame only on the first channel.