Physical (PHY) layer control for wireless local area network (WLAN) communication
This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for physical (PHY) layer control signaling. A first physical layer convergence protocol (PLCP) protocol data unit (PPDU) may precede a second PPDU. The first PPDU may be referred to as a PHY control PPDU and may include a physical layer control signaling field (CNT-SIG) that informs one or more stations (STAs) regarding a physical layer configuration they should use for the second PPDU. The PHY control PPDU may enable dynamic subchannel assignments for one or more identified STAs, legacy STAs, or sub-bandwidth operating devices. The techniques of this disclosure may enable sharing of a wide bandwidth wireless channel by different types of devices or different basic service sets (BSSs) assigned to different subchannels of the wireless channel.
1. A method for wireless communications by an apparatus of an access point (AP), comprising:
transmitting, via a wireless channel, a first physical layer convergence protocol (PLCP) protocol data unit (PPDU) indicating a common field and at least one per-user field following the common field, the common field being coded and the at least one per-user field being coded with a same coding, and the common field being separate from a universal signal field (U-SIG) in the first PPDU.
2. The method of claim 1 , wherein the same coding of the common field and the at least one per-user field comprises a convolutional code.
3. The method of claim 1 , wherein the common field and the at least one per-user field that are coded with the same coding are included in an Extremely High Throughput (EHT) signal field (EHT-SIG).
4. The method of claim 3 , wherein the common field comprises a basic service set (BSS) color extension field and a field to indicate a quantity of the at least one per-user field included in the EHT-SIG.
5. The method of claim 3 , wherein the EHT-SIG follows the U-SIG in the first PPDU.
6. The method of claim 3 , wherein a physical (PHY) layer control signal field (CNT-SIG) is included in the EHT-SIG and follows the U-SIG in the first PPDU, the CNT-SIG being signaled at a higher modulation and coding scheme (MCS) than an MCS used to signal the U-SIG.
7. The method of claim 3 , wherein a physical (PHY) layer control signal field (CNT-SIG) is included in the EHT-SIG and follows the U-SIG in the first PPDU, the CNT-SIG having a larger cyclic prefix length than a cyclic prefix length associated with the U-SIG.
8. An apparatus for wireless communications at an access point (AP), comprising:
a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the apparatus to:
transmit, via a wireless channel, a first physical layer convergence protocol (PLCP) protocol data unit (PPDU) indicating a common field and at least one per-user field following the common field, the common field being coded and the at least one per-user field being coded with a same coding, and the common field being separate from a universal signal field (U-SIG) in the first PPDU.
9. The apparatus of the AP of claim 8 , wherein the same coding of the common field and the at least one per-user field comprises a convolutional code.
10. The apparatus of the AP of claim 8 , wherein the common field and the at least one per-user field that are coded with the same coding are included in an Extremely High Throughput (EHT) signal field (EHT-SIG).
11. The apparatus of the AP of claim 10 , wherein the common field comprises a basic service set (BSS) color extension field and a field to indicate a quantity of the at least one per-user field included in the EHT-SIG.
12. The apparatus of the AP of claim 10 , wherein the EHT-SIG follows the U-SIG in the first PPDU.
13. The apparatus of the AP of claim 10 , wherein a physical (PHY) layer control signal field (CNT-SIG) is included in the EHT-SIG and follows the U-SIG in the first PPDU, the CNT-SIG being signaled at a higher modulation and coding scheme (MCS) than an MCS used to signal the U-SIG.
14. The apparatus of the AP of claim 10 , wherein a physical (PHY) layer control signal field (CNT-SIG) is included in the EHT-SIG and follows the U-SIG in the first PPDU, the CNT-SIG having a larger cyclic prefix length than a cyclic prefix length associated with the U-SIG.
15. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to:
transmit, via a wireless channel, a first physical layer convergence protocol (PLCP) protocol data unit (PPDU) indicating a common field and at least one per-user field following the common field, the common field being coded and the at least one per-user field being coded with a same coding, and the common field being separate from a universal signal field (U-SIG) in the first PPDU.
16. The non-transitory computer-readable medium of claim 15 , wherein the same coding of the common field and the at least one per-user field comprises a convolutional code.
17. The non-transitory computer-readable medium of claim 15 , wherein the common field and the at least one per-user field that are coded with the same coding are included in an Extremely High Throughput (EHT) signal field (EHT-SIG).
18. The non-transitory computer-readable medium of claim 17 , wherein the common field comprises a basic service set (BSS) color extension field and a field to indicate a quantity of the at least one per-user field included in the EHT-SIG.
19. The non-transitory computer-readable medium of claim 17 , wherein the EHT-SIG follows the U-SIG in the first PPDU.
20. The non-transitory computer-readable medium of claim 17 , wherein a physical (PHY) layer control signal field (CNT-SIG) is included in the EHT-SIG and follows the U-SIG in the first PPDU, the CNT-SIG being signaled at a higher modulation and coding scheme (MCS) than an MCS used to signal the U-SIG.