Operation method of station in wireless local area network

• US 10,693,532 B2
• Filed: 09/02/2015
• Issued: 06/23/2020
• 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
• Primary Examiner(s): Mattis, Jason E
• Assistant Examiner(s): Shao, Hong
• Application Number:
  US14/843,956
• Publication Number:
  US 20160066338A1
• Time in Patent Office: 1,756 Days
• Field of Search: None
• 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 first scheduling information of a first plurality of reception stations and second scheduling information of a second plurality of reception stations different from the first plurality of reception stations;

generating a physical layer protocol data unit (PPDU) including a legacy preamble, the HE preamble, and a payload, the payload being after the HE preamble and including a plurality of time domains, the plurality of time domains including a first time domain having a first plurality of data units to be transmitted to the first plurality of reception stations and a second time domain having a second plurality of data units to be transmitted to the second plurality of reception stations; and

transmitting the PPDU using one or more frequency bands,

wherein the first scheduling information includes

     1) first resource allocation information indicating a resource in the first time domain allocated to the first plurality of reception stations, and

     2) a first station identifier list including identification information for each of the first plurality of reception stations,

wherein the second scheduling information includes

     1) second resource allocation information indicating a resource in the second time domain allocated to the second plurality of reception stations, and

     2) a second station identifier list including identification information for each of the second plurality of reception stations, and

wherein the first resource allocation information includes a first allocation pattern of the one or more frequency bands, and the second resource allocation information includes a second allocation pattern of the one or more frequency bands.

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 first 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 first scheduling information further includes identification information of a sub-group to which the first plurality of reception stations belong.

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

7. The operation method according to claim 6, wherein the scheduling information of the plurality of groups includes resource allocation information indicating a resource allocated to the plurality of groups and identification information for each of the plurality of groups.

8. The operation method according to claim 1, wherein the HE preamble further includes information indicating that the payload is divided into the plurality of time domains.

9. The operation method according to claim 1, wherein the HE preamble further includes information indicating lengths of data units included in each of the plurality of time domains.

10. 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.

11. 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 belonging to different access categories respectively belong.

12. 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 the data units belonging to the different access categories.

18. The operation method according to claim 1, wherein the one or more frequency bands includes a plurality of frequency bands.

20. The operation method according to claim 1, wherein the first station identifier list includes a first plurality of station identifiers, the second station identifier list includes a second plurality of station identifiers, or both.

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

receiving, using one or more frequency bands, a physical layer protocol data unit (PPDU) including a payload, the payload being after a High Efficiency (HE) preamble of the PPDU and divided into a plurality of time domains, the plurality of time domains including a first time domain having a first plurality of data units intended for the first plurality of reception stations and a second time domain having a second plurality of data units intended for a second plurality of reception stations different from the first plurality of reception stations;

obtaining a legacy preamble of the PPDU;

obtaining the HE preamble of the PPDU, the HE preamble including first scheduling information for the first time domain and second scheduling information for the second time domain; and

obtaining at least one data unit of the first plurality of data units included in the first time domain of the payload of the PPDU through a resource of the first time domain indicated by the first scheduling information for the first plurality of reception stations,

wherein the first scheduling information includes

     1) first resource allocation information indicating the resource of the first time domain is allocated to the first station, and

     1) a first station identifier list including identification information for each of the first plurality of reception stations,

wherein the second scheduling information includes

     1) second resource allocation information indicating a resource of the second time domain is allocated to a second station, and

     1) a second station identifier list including identification information for each of the second plurality of reception stations, and

wherein the first resource allocation information includes a first allocation pattern of the one or more frequency bands, and the second resource allocation information includes a second allocation pattern of the one or more frequency bands.

14. The operation method according to claim 13, wherein the HE preamble further includes information indicating a transmission manner of the PPDU.

15. The operation method according to claim 13, wherein the first scheduling information further includes identification information of a sub-group to which the first plurality of reception stations belong.

16. The operation method according to claim 13, wherein the HE preamble further includes information indicating lengths of data units included in each of the plurality of time domains.

17. The operation method according to claim 13, wherein the one or more frequency bands includes a plurality of frequency bands.

19. The operation method according to claim 13, wherein the first station identifier list includes a first plurality of station identifiers, the second station identifier list includes a second plurality of station identifiers, or both.