Thanks Jason,
Length, GI/LTF, Tx power are all defined for TB PPDU already, but it is reused for Co-BF/Co-SR trigger frame. It makes sense to me to reuse existing field as much as possible.
What I found confusing is why we are not reusing the following existing field for TB PPDU as well.
Thanks,
Juan
From: Guoyuchen (Jason Yuchen Guo) <guoyuchen@xxxxxxxxxx>
Sent: Thursday, January 15, 2026 3:47 PM
To: Fang, Juan <juan.fang@xxxxxxxxx>; STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
Subject: re: Co-BF/Co-SR Trigger frame format discussion
Hi Juan,
Thanks for the comment.
The mapping that has been defined is for TB PPDU. However, in Co-BF/Co-SR transmission, we need a different mapping, i.e., more fields in the Co-BF PPDU should be copied from the Co-BF Trigger, hence, I placed the fields that need copy
in the same order as in the U-SIG/UHR-SIG, this will largely simplify the copy procedure.
Best,
Jason
发件人: Fang, Juan <juan.fang@xxxxxxxxx>
发送时间: 2026年1月16日 3:54
收件人: Guoyuchen (Jason Yuchen Guo) <guoyuchen@xxxxxxxxxx>;
STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
主题: RE: Co-BF/Co-SR Trigger frame format discussion
Hi Jason
Thanks for the update.
I have one comment on the special user info field. The specification already defined a mapping from B25-B36 of the special user info field to the B20-B25(BSS color 2 subfield) in U-SIG1 and B2
(CoBF/CoSR indication), B11-B15(number of UHR-SIG symbols field) in U-SIG2 for both EHT and UHR TB PPDU. We can easily extend this mapping to support DL non-OFDMA Co-BF transmission and DL SU Co-SR transmission as Length, GI/LTF size and TX power field, which
is reused to support DL non-OFDMA Co-BF transmission and DL SU Co-SR transmission. This would help to make the spec cleaner and more consistent.
Thanks,
Juan
From: Guoyuchen (Jason Yuchen Guo) <000018696e95f088-dmarc-request@xxxxxxxxxxxxxxxxx>
Sent: Thursday, January 15, 2026 9:55 AM
To: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBN] Co-BF/Co-SR Trigger frame format discussion
Dear TGbn members,
I have uploaded a revision of doc. 0023 based on the feedback from members.
Best,
Jason
发件人: Guoyuchen (Jason Yuchen Guo)
发送时间: 2026年1月15日 9:16
收件人: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
主题: Co-BF/Co-SR Trigger frame format discussion
Dear TGbn members,
Please let me know your feedback on doc. 11-26/0023r1 on Co-BF/Co-SR Trigger frame format, thank you!
Best,
Jason
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