IP Library › Granted Patent US 10,856,244

Granted Patent B2

US 10,856,244 · App. 16/509,117 · Granted Dec 1, 2020

Orthogonal multiplexing of high efficiency (HE) and extremely high throughput (EHT) wireless traffic

Inventors: Lochan Verma (San Diego, CA); Bin Tian (San Diego, CA); Sameer Vermani (San Diego, CA); Lin Yang (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W56/001 H04J3/067 H04L5/0044 H04L27/2605 H04L69/28 H04W88/08

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Quick Facts

Patent No.: US 10,856,244
App. No.: 16/509,117
Granted: Dec 1, 2020
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

This disclosure provides systems, methods, apparatus, including computer programs encoded on computer storage media for orthogonal multiplexing of high efficiency (HE) and extremely high throughput (EHT) wireless traffic. Devices in a wireless local area network (WLAN) may operate under HE or EHT conditions. An access point (AP) may support both HE and EHT communications with WLAN devices. To enable substantially simultaneous downlink HE and EHT transmissions and substantially simultaneous uplink HE and EHT transmissions, the AP may support orthogonal frequency-division multiple access (OFDMA) of HE and EHT transmissions. For example, pre-HE and pre-EHT modulated fields, HE and EHT modulated fields, and payloads may be aligned in time for the HE and EHT transmissions. The AP may ensure orthogonality for multiplexing the HE and EHT transmissions based on the alignment. In some implementations, a trigger frame may be utilized to indicate uplink transmission alignments.

Claims (61)

1. An apparatus for wireless communications at an access point (AP), comprising:

a first interface;

a processing system configured to:

align a set of first pre-modulated fields of a first preamble physical protocol data unit (PPDU) portion in time with a set of second pre-modulated fields of a second preamble PPDU portion, wherein the first pre-modulated fields and the second pre-modulated fields each include one or more of pre-high efficiency (HE) modulated fields or pre-extremely high throughput (EHT) modulated fields, and the first preamble PPDU portion and the second preamble PPDU portion each include one or more of an HE preamble PPDU portion or an EHT preamble PPDU portion;

align a set of first modulated fields of the first preamble PPDU portion in time with a set of second modulated fields of the second preamble PPDU portion, wherein the first modulated fields and the second modulate fields each include one or more of HE modulated fields or EHT modulated fields; and

output, over the first interface for transmission to a wireless device, the first preamble PPDU portion and the second preamble PPDU portion substantially simultaneously over a wireless channel, the first preamble PPDU portion occupying a different portion of a total bandwidth of the AP than the second preamble PPDU portion during the transmission, wherein the first preamble PPDU portion is transmitted orthogonally to the second preamble PPDU portion.

2. The apparatus of claim 1 , wherein the processing system is further configured to:

pad a signal B (SIG-B) field of the first preamble PPDU portion or the second preamble PPDU portion such that a duration of the set of first pre-modulated fields of the first preamble PPDU portion is the same as a duration of the set of second pre-modulated fields of the second preamble PPDU portion.

3. The apparatus of claim 1 , wherein the processing system is further configured to:

align a payload of the first preamble PPDU portion in time with a payload of the second preamble PPDU portion.

4. The apparatus of claim 3 , wherein:

aligning the payload of the first preamble PPDU portion in time with the payload of the second preamble PPDU portion includes padding one or more of the payload of the first preamble PPDU portion or the payload of the second preamble PPDU portion.

5. The apparatus of claim 1 , wherein:

the first preamble PPDU portion and the second preamble PPDU portion include one or more of an equal number of long training fields, a same orthogonal frequency-division multiplexing (OFDM) symbol duration, or a same guard interval (GI) duration.

6. The apparatus of claim 1 , wherein:

a number of long training fields of the first preamble PPDU portion is different from a number of long training fields of the second preamble PPDU portion, and the long training fields of the first preamble PPDU portion or the second preamble PPDU portion use a same orthogonal frequency-division multiplexing (OFDM) symbol duration and a same guard interval (GI) duration as a payload of the first preamble PPDU portion or the second preamble PPDU portion.

7. An apparatus for wireless communications at an access point (AP), comprising:

a first interface;

a second interface;

a processing system configured to:

output, over the first interface for transmission to a wireless device, a trigger frame over a total bandwidth of the AP; and

obtain over the second interface a transmission received in response to the trigger frame, the transmission including a first preamble physical protocol data unit (PPDU) portion and a second preamble PPDU portion, the first preamble PPDU portion occupying a different portion of the total bandwidth than the second preamble PPDU portion during the transmission, wherein the first preamble PPDU portion and the second preamble PPDU portion each include one or more of a high efficiency (HE) preamble PPDU portion or an extremely high throughput (EHT) preamble PPDU portion, and

wherein the first preamble PPDU portion is received orthogonally to the second preamble PPDU portion, a set of first pre-modulated fields of the first preamble PPDU portion is aligned in time with a set of second pre-modulated fields of the second preamble PPDU portion, and a set of first modulated fields of the first preamble PPDU portion is aligned in time with a set of second modulated fields of the second preamble PPDU portion, and wherein the first pre-modulated fields and the second pre-modulated fields each include one or more of pre-HE modulated fields or pre-EHT modulated fields, and the first modulated fields and the second modulate fields each include one or more of HE modulated fields or EHT modulated fields.

8. The apparatus of claim 7 , wherein

9. The apparatus of claim 7 , wherein:

10. The apparatus of claim 7 , wherein:

a payload of the first preamble PPDU portion is aligned in time with a payload of the second preamble PPDU portion.

11. The apparatus of claim 7 , wherein the processing system is further configured to:

generate a per-user information field corresponding to each of a first wireless station associated with the first preamble PPDU portion and a second wireless station associated with the second preamble PPDU portion, wherein the per-user information field corresponding to the first wireless station is equal in duration to the per-user information field corresponding to the second wireless station, and the per-user information field for each of the first wireless station and the second wireless station is included in the trigger frame.

12. The apparatus of claim 11 , wherein

the per-user information field indicates spatial stream allocation information for each of the first wireless station and the second wireless station, and the spatial stream allocation information is signaled in a combination of a spatial stream allocation subfield and one or more of an uplink forward error correction coding type subfield, an uplink dual carrier modulation subfield, or a reserved subfield.

13. A method for wireless communications at an access point (AP), comprising:

aligning a set of first pre-modulated fields of a first preamble physical protocol data unit (PPDU) portion in time with a set of second pre-modulated fields of a second preamble PPDU portion, wherein the first pre-modulated fields and the second pre-modulated fields each include one or more of pre-high efficiency (HE) modulated fields or pre-extremely high throughput (EHT) modulated fields, and the first preamble PPDU portion and the second preamble PPDU portion each include one or more of an HE preamble PPDU portion or an EHT preamble PPDU portion;

aligning a set of first modulated fields of the first preamble PPDU portion in time with a set of second modulated fields of the second preamble PPDU portion, wherein the first modulated fields and the second modulate fields each include one or more of HE modulated fields or EHT modulated fields; and

transmitting the first preamble PPDU portion and the second preamble PPDU portion substantially simultaneously over a wireless channel, the first preamble PPDU portion occupying a different portion of a total bandwidth of the AP than the second preamble PPDU portion during the transmission, wherein the first preamble PPDU portion is transmitted orthogonally to the second preamble PPDU portion.

14. The method of claim 13 , wherein aligning the set of first pre-modulated fields of the first preamble PPDU portion in time with the set of second pre-modulated fields of the second preamble PPDU portion includes:

padding a signal B (SIG-B) field of the first preamble PPDU portion or the second preamble PPDU portion such that a duration of the set of first pre-modulated fields of the first preamble PPDU portion is the same as a duration of the set of second pre-modulated fields of the second preamble PPDU portion.

15. The method of claim 13 , wherein aligning the set of first modulated fields of the first preamble PPDU portion in time with the set of second modulated fields of the second preamble PPDU portion further comprises:

aligning a payload of the first preamble PPDU portion in time with a payload of the second preamble PPDU portion.

16. The method of claim 15 , wherein:

17. The method of claim 13 , wherein:

the first preamble PPDU portion and the second preamble PPDU portion include one or more of: an equal number of long training fields, a same orthogonal frequency-division multiplexing (OFDM) symbol duration, or a same guard interval (GI) duration.

18. The method of claim 13 , wherein:

19. A method for wireless communications at an access point (AP), comprising:

transmitting a trigger frame over a total bandwidth of the AP; and

receiving, in response to the trigger frame, a transmission including a first preamble physical protocol data unit (PPDU) portion and a second preamble PPDU portion, the first preamble PPDU portion occupying a different portion of the total bandwidth than the second preamble PPDU portion during the transmission, wherein the first preamble PPDU portion and the second preamble PPDU portion each include one or more of a high efficiency (HE) preamble PPDU portion or an extremely high throughput (EHT) preamble PPDU portion, and

20. The method of claim 19 , wherein:

21. The method of claim 19 , wherein:

22. The method of claim 19 , wherein:

a payload of the first preamble PPDU portion is aligned in time with a payload of the second preamble PPDU portion.

23. The method of claim 19 , further comprising:

generating a per-user information field corresponding to each of a first wireless station associated with the first preamble PPDU portion and a second wireless station associated with the second preamble PPDU portion, wherein the per-user information field corresponding to the first wireless station is equal in duration to the per-user information field corresponding to the second wireless station, and the per-user information field for each of the first wireless station and the second wireless station is included in the trigger frame.

24. The method of claim 23 , wherein:

the per-user information field indicates spatial stream allocation information for each of the first wireless station and the second wireless station, and the spatial stream allocation information is signaled in a combination of a spatial stream allocation subfield and one or more of: an uplink forward error correction coding type subfield, an uplink dual carrier modulation subfield, or a reserved subfield.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 23, 2019

From: VERMA, LOCHAN; TIAN, BIN; VERMANI, SAMEER; YANG, LIN

To: QUALCOMM INCORPORATED

Reel/Frame 050807/0458 →

Continuity (2)

Provisional Application 62714016 · Aug 2, 2018

Related Publication 20200045656A1 · Feb 6, 2020

Cited By (1)

US 12,225,451