HIGH-EFFICIENCY (HE) STATION AND METHOD FOR CONFIGURATING HE PACKETS WITH LONG AND SHORT PREAMBLE FORMATS

• US 20160127948A1
• Filed: 12/22/2014
• Published: 05/05/2016
• Est. Priority Date: 11/05/2014
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Azizi, Shahrnaz, Stacey, Robert J., Kenney, Thomas J., Perahia, Eldad
• Granted Patent: US 10,165,470 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26132 using repetition
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Apparatuses, methods, and computer readable media are disclosed. A HE station may include circuity. The circuitry may be configured to: generate a HE packet with a short preamble format or a long preamble format, wherein the HE packet comprises one or more legacy signal (L-SIG) fields followed by one or more HE signal fields (HE-SIG) and an HE long-training field (HE-LTF); and configure the HE packet to indicate whether the HE packet is configured with the short preamble format or the long preamble format. The HE packet may be configured with the short preamble format or the long preamble format based on one from the following group: a symbol after the L-SIG fields, a L-SIG polarity of a repeated L-SIG, a number of times the L-SIG fields is repeated, or a length field of one of the one or more L-SIG fields.

Claims

1. A high-efficiency (HE) station comprising circuitry configured to:

generate a HE packet with a short preamble format or a long preamble format, wherein the HE packet comprises one or more legacy signal (L-SIG) fields followed by one or more HE signal fields (HE-SIG) and an HE long-training field (HE-LTF); and

configure the HE packet to indicate whether the HE packet is configured with the short preamble format or the long preamble format.

2. The HE station of claim 1, wherein the one or more legacy signal fields (L-SIGs) indicate whether the HE packet is configured with the short preamble format or the long preamble format.

3. The HE station of claim 1, wherein a symbol after the one or more L-SIGs) indicates whether the HE packet is configured with the short preamble format or the long preamble format.

4. The HE station of claim 1, wherein the circuitry is further configured to:

transmit the HE packet in a downlink transmission to a second HE station for communication in accordance with an orthogonal frequency division multiple access (OFDMA) technique in a transmission opportunity (TXOP).

5. The HE station of claim 1, wherein, for the short preamble format, the circuitry is to configure the fields for shorter-delay spread channels, and wherein for the long preamble format, the circuitry is to configure the fields for longer-delay spread channels.

6. The HE station of claim 1, wherein a modulo 3 of a length field of one of the one or more (L-SIGs) is to indicate whether the HE packet is configured with the short preamble format or the long preamble format.

7. The HE station of claim 6, wherein the length field modulo 3=1 and the length field modulo 3=2 are each to indicate different ones of the following group:

the short preamble format and the long preamble format.

8. The HE station of claim 1, wherein for the short preamble format, the circuitry is to compress the HE-LTF in accordance with a compression factor of up to 4×

, and wherein for the long preamble format, the circuitry is to configure the packet such that at least one of the L-SIG and the HE-SIG is repeated in the time-domain.

9. The HE Station of claim 1, wherein the circuitry is further configured to generate the HE packet in accordance with the long preamble format if a number of communication errors reaches a threshold.

10. The HE Station of claim 1, wherein the circuitry is further configured to generate the HE packet in accordance with the short preamble format for indoor usage and configured to generate the HE packet in accordance with the longer preamble format for outdoor usage.

11. The HE station of claim 1, wherein the HE-SIG comprises a HE-SIG-A, a HE-SIG-B1 and an HE-SIG-B2, and wherein for the long preamble format, the circuitry is to configure the packet such that the HE-SIG-A is repeated in a time domain and the HE-SIG-B1 is configured with a longer guard interval than the HE-SIG-B1 for the short preamble format.

12. The HE station of claim 11, wherein for the long preamble HE-SIG-A comprises SIG-A-A1 and SIG-A-A2 and wherein one or both of SIG-A-A1 and SIG-A-A2 are repeated.

13. The HE station of claim 1, wherein one from the following group:

whether one or more of the L-SIG fields is repeated, a symbol after the L-SIG fields, a L-SIG polarity of a repeated L-SIG, or a length field of one of the one or more L-SIG fields, is to indicate whether the HE packet is configured with the short preamble format or the long preamble format.

14. The HE station of claim 1, wherein for the long preamble format, the HE-LTF is to be either not compressed or compressed in accordance with a compression factor that is less than the compression factor used for compressing the HE-LTF for the short preamble format.

15. The HE station of claim 1, further comprising circuitry;

memory coupled to the circuitry; and

one or more antennas coupled to the circuitry.

16. A method for communication performed by a high-efficiency (HE) station, the method comprising:

generating a HE packet with a short preamble format or a long preamble format, wherein the HE packet comprises one or more legacy signal (L-SIG) fields followed by one or more HE signal fields (HE-SIG) and an HE long-training field (HE-LTF); and

configuring the HE packet to indicate whether the HE packet is configured with the short preamble format or the long preamble format.

17. The method of claim 16, wherein the one or more legacy signal fields (L-SIGs) indicate whether the HE packet is configured with the short preamble format or the long preamble format.

18. The method of claim 17, wherein a length field modulo 3=1 and the length field modulo 3=2 each indicate different ones of the following group:

the short preamble format and the long preamble format.

19. The method of claim 17, wherein one from the following group:

whether one or more of the L-SIG fields is repeated, a symbol after the L-SIG fields, a L-SIG polarity of a repeated L-SIG, or a length field of one of the one or more L-SIG fields, indicate whether the HE packet is configured with the short preamble format or the long preamble format.

20. A high-efficiency (HE) station comprising circuitry configured to:

receive a HE packet with a short preamble format or a long preamble format, wherein the HE packet comprises one or more legacy signal fields (L-SIGs) followed by one or more HE signal fields (HE-SIG) and an HE long-training field (HE-LTF); and

auto-detect whether the HE packet has the short preamble format or the long preamble format based on the HE packet.

21. The HE station of claim 20, wherein the circuitry is further configured to auto-detect whether the HE packet has the short preamble format or the long preamble format based on at least from the following group:

whether one or more of the L-SIG fields is repeated, a L-SIG polarity of a repeated L-SIG, a symbol after the L-SIG fields, or a length field of one of the one or more L-SIG fields.

22. The HE station of claim 20, wherein the circuitry is further configured to auto-detect whether the HE packet has the short preamble format or the long preamble format based on a modulo 3 of a length field of one of the one or more L-SIGs.

23. The HE station of claim 20, further comprising memory and one or more antennas coupled to the circuitry.

24. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for communication by a wireless communication device, the instructions to configure the one or more processors to cause the wireless communication device to:

configure a HE packet with a short preamble format or a long preamble format, wherein the HE packet comprises one or more legacy signal (L-SIG) fields followed by one or more HE signal fields (HE-SIG) and an HE long-training field (HE-LTF); and

configure the one or more legacy signal fields (L-SIGs) to indicate whether the HE packet is configured with the short preamble format or the long preamble format.

25. The non-transitory computer-readable storage medium of claim 24, wherein the instructions further configure the one or more processors to cause the wireless communication device to:

configure the one or more legacy signal fields (L-SIGs) to indicate whether the HE packet is configured with the short preamble format or the long preamble format based on a modulo 3 of a length field of one of the one or more (L-SIGs).