High efficiency signaling
This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for high efficiency (HE) beacons. HE supported access points (APs) and stations (STAs) may operate on resource deployments used for Wi-Fi technology and without support for legacy devices, also referred to as a greenfield deployment. An AP may identify updated capability information and transmit a HE physical layer convergence protocol (PLCP) protocol data unit (PPDU) including a beacon frame. A STA may receive, from the AP, the HE or EHT PPDU and identify an indication of change to a content or format of the beacon frame relative to a reference beacon frame. Based on the identified indication, the STA may then determine an updated content or format for the beacon frame and process the beacon frame or skip processing for one or more portions of the beacon frame.
1. A method for wireless communication at an access point (AP), comprising:
transmitting, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
the PPDU includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame,
the content of the first beacon frame comprises content of one or more information elements of the first beacon frame, and
the indication of the change in the field comprises at least one of an increment to a sequence number value associated with the one or more information elements or a hash of a value carried by at least one of the one or more information elements.
2. The method of claim 1 , wherein the field comprises an aggregated control field of a high efficiency (HE) or extremely high throughput (EHT) variant of a high throughput (HT) control field of the first beacon frame.
3. The method of claim 1 , wherein transmitting the first beacon frame carrying the updated capability information further comprises:
transmitting the indication in a first field of the PPDU that directly follows a preamble of the PPDU.
4. The method of claim 3 , wherein the first field comprises a service field for a data portion of the PPDU, and the indication comprises the sequence number value within the service field.
5. The method of claim 1 , wherein:
the first beacon frame is formatted for a first radio frequency spectrum band; and
the reference beacon frame is formatted for a second radio frequency spectrum band.
6. The method of claim 1 , wherein the PPDU comprises an aggregate MPDU (A-MPDU) comprising the first beacon frame.
7. The method of claim 1 , wherein transmitting the first beacon frame carrying the updated capability information further comprises:
transmitting the indication of the change to the content or the format, or both, of the first beacon frame in at least one delimiter field.
8. A method for wireless communication at an access point (AP), comprising:
transmitting, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
a first field of the PPDU that directly follows a preamble of the PPDU includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame.
9. The method of claim 8 , wherein the first field comprises a service field for a data portion of the PPDU, and the indication comprises a sequence number value within the service field.
10. The method of claim 8 , wherein the content of the first beacon frame comprises content of one or more information elements of the first beacon frame.
11. The method of claim 8 , wherein:
the first beacon frame is formatted for a first radio frequency spectrum band; and
the reference beacon frame is formatted for a second radio frequency spectrum band.
12. A method for wireless communication at an access point (AP), comprising:
transmitting, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
the PPDU includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame,
the first beacon frame is formatted for a first radio frequency spectrum band, and
the reference beacon frame is formatted for a second radio frequency spectrum band.
13. The method of claim 12 , wherein transmitting the first beacon frame carrying the updated capability information further comprises:
transmitting, in the field of the first beacon frame, the indication of the change to the content of the first beacon frame, wherein the content of the first beacon frame comprises content of one or more information elements of the first beacon frame.
14. A method for wireless communication at an access point (AP), comprising:
transmitting, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
the PPDU comprises an aggregate MPDU (A-MPDU) comprising the first beacon frame,
the PPDU comprises at least one delimiter field, and
the at least one delimiter field includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame.
15. The method of claim 14 , wherein the content of the first beacon frame comprises content of one or more information elements of the first beacon frame.
16. An apparatus for wireless communication at an access point (AP), comprising:
a processor,
memory coupled with the processor and the memory including instructions executable by the processor to cause the apparatus to:
transmit, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
the PPDU includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame,
the content of the first beacon frame comprises content of one or more information elements of the first beacon frame, and
the indication of the change in the field comprises at least one of an increment to a sequence number value associated with the one or more information elements or a hash of a value carried by at least one of the one or more information elements.
17. The apparatus of claim 16 , wherein the field comprises an aggregated control field of a high efficiency (HE) or extremely high throughput (EHT) variant of a high throughput (HT) control field of the first beacon frame.
18. The apparatus of claim 16 , wherein the instructions to transmit the first beacon frame carrying the updated capability information are further executable by the processor to cause the apparatus to:
transmit the indication in a first field of the PPDU that directly follows a preamble of the PPDU.
19. The apparatus of claim 18 , wherein the first field comprises a service field for a data portion of the PPDU, and the indication comprises the sequence number value within the service field.
20. The apparatus of claim 16 , wherein:
the first beacon frame is formatted for a first radio frequency spectrum band; and
the reference beacon frame is formatted for a second radio frequency spectrum band.
21. The apparatus of claim 16 , wherein the PPDU comprises an aggregate MPDU (A-MPDU) comprising the first beacon frame.
22. The apparatus of claim 16 , wherein the instructions to transmit the first beacon frame carrying the updated capability information are further executable by the processor to cause the apparatus to:
transmit the indication of the change to the content or the format, or both, of the first beacon frame in at least one delimiter field.
23. An apparatus for wireless communication at an access point (AP), comprising:
a processor,
memory coupled with the processor and the memory including instructions executable by the processor to cause the apparatus to:
transmit, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
a first field of the PPDU that directly follows a preamble of the PPDU includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame.
24. The apparatus of claim 23 , wherein the first field comprises a service field for a data portion of the PPDU, and the indication comprises a sequence number value within the service field.
25. The apparatus of claim 23 , wherein the content of the first beacon frame comprises content of one or more information elements of the first beacon frame.
26. The apparatus of claim 23 , wherein:
the first beacon frame is formatted for a first radio frequency spectrum band; and
the reference beacon frame is formatted for a second radio frequency spectrum band.
27. An apparatus for wireless communication at an access point (AP), comprising:
a processor,
memory coupled with the processor and the memory including instructions executable by the processor to cause the apparatus to:
transmit, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
the PPDU includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame,
the first beacon frame is a beacon frame formatted for a first radio frequency spectrum band, and
the reference beacon frame is a beacon frame formatted for a second radio frequency spectrum band.
28. The apparatus of claim 27 , wherein the instructions to transmit the first beacon frame carrying the updated capability information are further executable by the processor to cause the apparatus to:
transmit, in a field of the first beacon frame, the indication of the change to the content of the first beacon frame, wherein the content of the first beacon frame comprises content of one or more information elements of the first beacon frame.
29. An apparatus for wireless communication at an access point (AP), comprising:
a processor,
memory coupled with the processor and the memory including instructions executable by the processor to cause the apparatus to:
transmit, in a field of a first beacon frame of a physical layer convergence protocol (PLCP) protocol data unit (PPDU), updated capability information of the AP, wherein:
the PPDU comprises an aggregate MPDU (A-MPDU) comprising the first beacon frame,
the PPDU comprises at least one delimiter field, and
the at least one delimiter field includes an indication of a change to a content or a format, or both, of the first beacon frame relative to a reference beacon frame.
30. The apparatus of claim 29 , wherein the content of the first beacon frame comprises content of one or more information elements of the first beacon frame.