Orthogonal multiplexing of high efficiency (HE) and extremely high throughput (EHT) wireless traffic
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.
1. An apparatus for wireless communications, comprising:
at least one processor; and
memory comprising instructions executable by the at least one processor to cause the apparatus to:
obtain a trigger frame that indicates one or more common information fields and one or more per-user information fields; and
output a first protocol data unit for transmission via a first resource unit of two or more resource units allocated by the trigger frame based at least in part on the one or more common information fields and the one or more per-user information fields indicated by the trigger frame, wherein the first protocol data unit comprises a first set of fields and a second set of fields, wherein the first set of fields are aligned in time with a third set of fields of a second protocol data unit, and wherein the second set of fields are aligned in time with a fourth set of fields of the second protocol data unit, and wherein a second resource unit of the two or more resource units is allocated for transmission of the second protocol data unit.
2. The apparatus of claim 1 , wherein the first protocol data unit is output for transmission according to a spectral masking parameter indicated by the trigger frame.
3. The apparatus of claim 1 , wherein the one or more common information fields comprise high efficiency (HE) signal A (SIG-A) reserved fields that indicate common information for extremely high throughput (EHT) communications.
4. The apparatus of claim 1 , wherein a symbol boundary alignment between the first protocol data unit and the second protocol data unit maintains orthogonality between the first protocol data unit and the second protocol data unit.
5. The apparatus of claim 1 , wherein the first protocol data unit comprises a first trigger-based uplink physical protocol data unit (PPDU) and the second protocol data unit comprises a second trigger-based uplink PPDU.
6. The apparatus of claim 1 , wherein the first protocol data unit and the second protocol data unit comprise a same number of high efficiency (HE) long training fields or extremely high throughput (EHT) long training fields.
7. The apparatus of claim 1 , wherein the first protocol data unit and the second protocol data unit comprise a different number of high efficiency (HE) long training fields or extremely high throughput (EHT) long training fields.
8. The apparatus of claim 1 , wherein the one or more common information fields indicate a number of high efficiency (HE) long training fields in one or both of the first protocol data unit or the second protocol data unit, a number of extremely high throughput (EHT) long training fields in one or both of the first protocol data unit or the second protocol data unit, a long training field duration for one or both of the first protocol data unit or the second protocol data unit, a guard interval (GI) duration for one or both of the first protocol data unit or the second protocol data unit, or a combination thereof.
9. The apparatus of claim 1 , wherein one or both of the first protocol data unit or the second protocol data unit comprise a set of padding bits that maintain a payload alignment between the first protocol data unit and the second protocol data unit.
10. The apparatus of claim 1 , wherein the first protocol data unit and the second protocol data unit comprise a same guard interval (GI).
11. The apparatus of claim 1 , wherein a bandwidth of the first resource unit is equal to a bandwidth of the second resource unit.
12. The apparatus of claim 1 , wherein a bandwidth of the first resource unit is different from a bandwidth of the second resource unit.
13. The apparatus of claim 1 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
select the first resource unit for transmission of the first protocol data unit based at least in part on a resource unit allocation index indicated by the one or more per-user information fields.
14. The apparatus of claim 1 , wherein the one or more per-user information fields indicate spatial streams to use for transmission of the first protocol data unit and the second protocol data unit.
15. The apparatus of claim 1 , wherein the apparatus further comprises at least one antenna via which the first protocol data unit is output for transmission, and wherein the apparatus is configured as a wireless station.
16. A wireless station, comprising:
a processing system; and
a transceiver coupled with the processing system, wherein the transceiver is configured to:
receive a trigger frame that indicates one or more common information fields and one or more per-user information fields; and
transmit a first protocol data unit via a first resource unit of two or more resource units allocated by the trigger frame based at least in part on the one or more common information fields and the one or more per-user information fields indicated by the trigger frame, wherein the first protocol data unit comprises a first set of fields and a second set of fields, wherein the first set of fields are aligned in time with a third set of fields of a second protocol data unit, and wherein the second set of fields are aligned in time with a fourth set of fields of the second protocol data unit, and wherein a second resource unit of the two or more resource units is allocated for transmission of the second protocol data unit.
17. The wireless station of claim 16 , wherein the first protocol data unit is transmitted according to a spectral masking parameter indicated by the trigger frame.
18. The wireless station of claim 16 , wherein at least one of: a symbol boundary alignment between the first protocol data unit and the second protocol data unit maintains orthogonality between the first protocol data unit and the second protocol data unit; or
the first protocol data unit and the second protocol data unit are transmitted according to different Institute of Electrical and Electronics Engineers (IEEE) 802.11 versions.
19. The wireless station of claim 16 , wherein the one or more common information fields indicate a number of high efficiency (HE) long training fields in one or both of the first protocol data unit or the second protocol data unit, a number of extremely high throughput (EHT) long training fields in one or both of the first protocol data unit or the second protocol data unit, a long training field duration for one or both of the first protocol data unit or the second protocol data unit, a guard interval (GI) duration for one or both of the first protocol data unit or the second protocol data unit, or a combination thereof.
20. A method for wireless communications at a wireless station, comprising:
obtaining a trigger frame that indicates one or more common information fields and one or more per-user information fields; and
outputting a first protocol data unit via a first resource unit of two or more resource units allocated by the trigger frame based at least in part on the one or more common information fields and the one or more per-user information fields indicated by the trigger frame, wherein the first protocol data unit comprises a first set of fields and a second set of fields, wherein the first set of fields are aligned in time with a third set of fields of a second protocol data unit, and wherein the second set of fields are aligned in time with a fourth set of fields of the second protocol data unit, and wherein a second resource unit of the two or more resource units is allocated for transmission of the second protocol data unit.