OPERATION METHOD OF STATION IN WIRELESS LOCAL AREA NETWORK

• US 20160066338A1
• Filed: 09/02/2015
• Published: 03/03/2016
• Est. Priority Date: 09/03/2014
• Status: Active Grant

• Current Assignee: Atlas Global Technologies LLC (Acacia Research Corporation)
• Original Assignee: Newracom Inc.
• Inventors: KWON, Hyoungjin, KIM, Jeehoon, CHEONG, Minho
• Granted Patent: US 10,693,532 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0087 when data requirements change
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

An operation method of a station in a wireless local area network (WLAN) is disclosed. An operation method of a first station comprises generating a high efficiency (HE) preamble including scheduling information of a plurality of reception stations; and generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including a legacy preamble, the HE preamble, and a payload having data units to be transmitted to the plurality of reception stations. Therefore, a performance of WLAN may be enhanced.

Claims

1. An operation method performed in a first station, the method comprising:

generating a high efficiency (HE) preamble including scheduling information of a plurality of reception stations; and

generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including a legacy preamble, the HE preamble, and a payload having data units to be transmitted to the plurality of reception stations.

2. The operation method according to claim 1, wherein the HE preamble further includes information indicating a transmission manner of the PPDU.

3. The operation method according to claim 1, wherein the PPDU is transmitted based on at least one of a multi user-multiple input multiple output (MU-MIMO) and an orthogonal frequency division multiple access (OFDMA).

4. The operation method according to claim 1, wherein the scheduling information is included in a HE signal (HE-SIG) field of the HE preamble.

5. The operation method according to claim 1, wherein the scheduling information includes resource allocation information indicating a resource allocated to the plurality of reception stations and identification information for each of the plurality of reception stations.

6. The operation method according to claim 5, wherein the scheduling information further includes identification information of a sub-group to which the plurality of reception stations belong.

7. The operation method according to claim 5, wherein the resource allocation information is an allocation pattern of spatial streams or an allocation pattern of frequency bands.

8. The operation method according to claim 1, wherein the HE preamble further includes scheduling information of a plurality of groups to which the plurality of reception stations respectively belong.

10. The operation method according to claim 1, wherein, when the payload included in the PPDU is divided into a plurality of time domains and at least one time domain among the plurality of time domains has a different allocation pattern of frequency bands, the HE preamble includes scheduling information for each of the plurality of time domains.

11. The operation method according to claim 1, wherein, when the payload included in the PPDU is divided into a plurality of time domains, the HE preamble further includes information indicating that the payload is divided into the plurality of time domains.

12. The operation method according to claim 1, wherein, when the payload included in the PPDU is divided into a plurality of time domains, the HE preamble further includes information indicating lengths of data units included in each of the plurality of time domains.

13. The operation method according to claim 1, wherein, when the PPDU includes data units belonging to different access categories, the HE preamble further includes information indicating that the PPDU includes data units belonging to different access categories.

14. The operation method according to claim 1, wherein, when the PPDU includes data units belonging to different access categories, the HE preamble further includes traffic identifiers (TIDs) for access categories to which the data units respectively belong.

15. The operation method according to claim 1, wherein the PPDU includes data units belonging to different access categories and information indicating an end of data units belonging to a first access category, and the information indicating the end of data units is located between data units belonging to the different access categories.

9. The operation method according to claim 9, wherein the scheduling information includes resource allocation information indicating a resource allocated to the plurality of groups and identification information for each of the plurality of groups.

16. An operation method performed by a first station, the method comprising:

obtaining a legacy preamble of a physical layer convergence procedure (PLCP) protocol data unit (PPDU);

obtaining a high efficiency (HE) preamble of the PPDU; and

obtaining at least one data unit included in a payload of the PPDU through a resource indicated by scheduling information for a plurality of reception stations included in the HE preamble.

17. The operation method according to claim 16, wherein the HE preamble further includes information indicating a transmission manner of the PPDU.

18. The operation method according to claim 16, wherein the scheduling information includes resource allocation information indicating a resource allocated to the plurality of reception stations and identification information for each of the plurality of reception stations.

19. The operation method according to claim 16, wherein the scheduling information further includes identification information of a sub-group to which the plurality of reception stations belong.

20. The operation method according to claim 18, wherein the resource allocation information is an allocation pattern of spatial streams or an allocation pattern of frequency bands.

21. The operation method according to claim 16, wherein, when the payload included in the PPDU is divided into a plurality of time domains and at least one time domain among the plurality of time domains has a different allocation pattern of frequency bands, the HE preamble includes scheduling information for each of the plurality of time domains.

22. The operation method according to claim 16, wherein, when the payload included in the PPDU is divided into a plurality of time domains, the HE preamble further includes information indicating lengths of data units included in each of the plurality of time domains.