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Hi Alice, I was just intended to clarify which option that paragraph want to propose, because it’s not clear to me. Your modified text "In addition to that PPDU Type And Compression Mode being set to 1" looks better. Since you referred to the motion, I want to clarify that when that motion passed, there was another agreement that NDP will be derived same as 11ax. Then later on there was a new agreement that NDP is identified by EHT-MCS + EHT-SIG. With
this new agreement, the motion you referred to actually doesn’t need to include NDP because there is a new way to identify NDP. I think this was something we missed in the development.
For your 2nd question, if opt.1 is used, PPDU Type And Compression Mode Subfield can be reserved and repurposed in future which is a benefit of option 1. I don’t have strong intension to really promote option 1 but just to point out the disconnection here.
BRs, Xiaogang. From: Alice Jialing Li <jialing.li.phd2@xxxxxxxxx> 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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