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Xiaogang, Maybe we can do it in a way, where we only say what the transmitter is doing, and the receiver implementation is free to figure out that a packet is an NDP however it likes. So, something like below should work: PPDU Type And Compression Mode is set to 1 for an EHT MU PPDU that is a transmission to a single user or an EHT sounding NDP, regardless of the value of the UL/DL field.
For an EHT sounding NDP, EHT-SIG MCS is set to 0 and Number of EHT-SIG Symbols is set to 0. Thanks, Sameer From: Alice Jialing Li <jialing.li.phd2@xxxxxxxxx> CAUTION: This email originated from outside of
the organization. Hi Xiaogang, Thanks for your question. Firstly, per Motion 137, #SP291, SU/SU DUP/NDP are indicated by the PPDU Type And Compression Mode field being set to 1. This is Option 2. We follow it. Secondly, spec writing needs to be clear for people to follow. For argument purpose, assume Option 1. What if the UL/DL field being set to 0, PPDU Type And Compression Mode being set to 0, EHT-SIG MCS being set to 0, and Number of EHT-SIG
symbols being set to 0 in the same U-SIG of an EHT PPDU? Is it a DL OFDMA transmission, or an EHT sounding NDP? So far, there is no rule (in passed SP or spec text) to support the value of the PPDU Type And Compression Mode field being overwritten by other
signaling. Lastly, let me clarify about the 2nd sentence in the highlighted paragraph. "In addition" means "In addition to that PPDU Type And Compression Mode being set to 1" based on the context in the paragraph. If you or anyone else think that
"In addition" is not clear enough, I'm more than happy to improve the wording by replacing it with "In addition to that PPDU Type And Compression Mode being set to 1". The highlighted paragraph is option 2, instead of option 1. Regards, Alice Chen Qualcomm On Wed, Mar 17, 2021 at 2:04 PM Chen, Xiaogang C <xiaogang.c.chen@xxxxxxxxx> wrote:
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