Physical layer preamble design for special packet types
This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs for special cases such as, for example, full-bandwidth multi-user multiple-input multiple-output (MU-MIMO), single-user (SU) preamble puncturing, hybrid automatic repeat request (HARQ), and multi-AP coordination. Multi-AP coordination may refer to coordinated beamforming (CoBF), joint transmission (JT), or coordinated orthogonal frequency division multiple access (C-OFDMA). Additionally, or alternatively, some implementations more specifically relate to preamble designs that accommodate signal fields of different cases.
1. A method for wireless communication at a wireless communication device comprising:
obtaining a packet including a physical layer preamble that includes a first portion and a second portion following the first portion, the first portion including a legacy signal field (L-SIG), the second portion including a repeat of the L-SIG (RL-SIG) that immediately follows the L-SIG and a pre-signal field (Pre-SIG) that immediately follows the RL-SIG, wherein the Pre-SIG includes information for interpreting one or more subsequent fields of the second portion;
determining a physical layer convergence protocol (PLCP) protocol data unit (PPDU) format of the packet based at least in part on a value of compression field in the pre-SIG;
determining that the packet is transmitted using full bandwidth multi-user multiple-input multiple-output (MU-MIMO);
determining a bandwidth of the packet based at least in part on the information included in the Pre-SIG; and
processing the packet based at least in part on the determined bandwidth, the determined PPDU format, and the determination that the packet was transmitted using full-bandwidth MU-MIMO.
2. The method of claim 1 , wherein the one or more subsequent fields includes an Extremely High Throughput (EHT) signal field (EHT-SIG) following the Pre-SIG.
3. The method of claim 2 , wherein the EHT-SIG includes a common field and a user specific field consisting of one or more user fields.
4. The method of claim 3 , wherein resource unit (RU) allocation information is absent from the common field in the EHT-SIG.
5. An apparatus for wireless communication, comprising:
a processing system configured to:
obtain a packet including a physical layer preamble that includes a first portion and a second portion following the first portion, the first portion including a legacy signal field (L-SIG), the second portion including a repeat of the L-SIG (RL-SIG) that immediately follows the L-SIG and a pre-signal field (Pre-SIG) that immediately follows the RL-SIG, wherein Pre-SIG includes information for interpreting one or more subsequent fields of the second portion;
determine a physical layer convergence protocol (PLCP) protocol data unit (PPDU) format of the packet based at least in part on a value of compression field in the pre-SIG;
determine that the packet is transmitted using full bandwidth multi-user multiple-input multiple-output (MU-MIMO);
determine a bandwidth of the packet based at least in part on the information included in the Pre-SIG; and
process the packet based at least in part on the determined bandwidth, the determined PPDU format, and the determination that the packet was transmitted using full-bandwidth MU-MIMO.
6. The apparatus of claim 5 , wherein the one or more subsequent fields includes an Extremely High Throughput (EHT) signal field (EHT-SIG) following the Pre-SIG.
7. The apparatus of claim 6 , wherein the EHT-SIG includes a common field and a user specific field consisting of one or more user fields.
8. The apparatus of claim 7 , wherein resource unit (RU) allocation information is absent from the common field in EHT-SIG.
9. A wireless communication device, comprising:
at least one modem configured to receive a packet via a wireless channel; and
a processing system configured to:
obtain the packet from the at least one modem, the packet including a physical layer preamble that includes a first portion and a second portion following the first portion, the first portion including a legacy signal field (L-SIG), the second portion including a repeat of the L-SIG (RL-SIG) that immediately follows the L-SIG and a presignal field (Pre-SIG) that immediately follows the RL-SIG, wherein the Pre-SIG includes information for interpreting one or more subsequent fields of the second portion;
determine a physical layer convergence protocol (PLCP) protocol data unit (PPDU) format of the packet based at least in part on a value of compression field in the pre-SIG;
determine that the packet is transmitted using full bandwidth multi-user multiple-input multiple-output (MU-MIMO);
determine a bandwidth of the packet based at least in part on the information included in the Pre-SIG; and
process the packet based at least in part on the determined bandwidth, the determined PPDU format, and the determination that the packet was transmitted using full-bandwidth MU-MIMO.
10. The wireless communication device of claim 9 , wherein the one or more subsequent fields includes an Extremely High Throughput (EHT) signal field (EHT-SIG) following the Pre-SIG.
11. The wireless communication device of claim 10 , wherein the EHT-SIG includes a common field and a user specific field consisting of one or more user fields.
12. The wireless communication device of claim 11 , wherein resource unit (RU) allocation information is absent from the common field in the EHT-SIG.