Hi Michail,
Thanks for your discussion. Please find my response inline.
Regards
Guogang Huang
发件人: Mark Rison [mailto:m.rison@xxxxxxxxxxx]
发送时间: 2022年4月6日
16:03
收件人: huangguogang <huangguogang1@xxxxxxxxxx>; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
抄送: Michail Koundourakis <m.koundou@xxxxxxxxxxxxxxxxxxx>
主题: RE: Discussion on power save of AP MLD
[I am sending this email on behalf of my colleague Michail, who's having
trouble posting to the TGbe reflector.]
Hi Guogang,
Thank you for the contribution and for taking time to answer to our comments.
I have 2 comments:
The first is in a specific clause; in the new section 35.3.13 you propose:
When an AP affiliated with an AP MLD is operating in the sleep mode,
-
All the existing TWT agreements on this link shall be suspended;
-
All the TID-to-link mapping agreements are teardown and the default TID-to-link mapping is used.
Tearing down TID-to-link mapping agreements may be problematic, especially when these agreements have nothing to do with the Link in Sleep Mode. What happens
for TID-to-link mappings which are negotiated after the AP is in Sleep Mode; are these disallowed or cannot be effective either?
[Guogang Huang] Yes, I get your point. So I modify this current text as following. Please let me know whether it works for you.
Your proposal tries to reuse the existing awake and doze modes, to which I agree with, so power save state of the AP should not interfere with MLD features
which should be managed orthogonally.
[Guogang Huang]Thanks for your support on this direction.
My second comments is that the MoreData bit used by the non-AP MLD to signal further BU in the Link, will not very well in EMLSR mode.
In EMLSR mode, the STAs operating on the EMLSR link pair cannot predict which link they will use in the next
Uplink TxOp. Therefore the STA may transmit an MPDU with MoreData=1 as it has another MPDU buffered (with More Data="" but the subsequent (More Data="" MPDU may be transmitted on the other (EMLSR) link so the Power Save AP can only rely on the “The
channel has been idle for a given time period.” which may never occur if the channel is busy.
[Guogang Huang]Sorry, I’m not very clear to
your question. According to the baseline, the More Data subfield is link-level with the TID-to-link mapping restriction. When the More Data subfield is set to 0, it means there is at least one buffered BU for the corresponding AP at this affiliated STA. Could
you elaborate your question?
Kind regards,
Michail
From: huangguogang <000017b1384624cd-dmarc-request@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, 30 March 2022 17:01
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBE] Discussion on power save of AP MLD
Hi all,
I have presented my contribution 22/356r5 in the call. But there is no time to take questions. I initiate this email thread to further discussion for doc 22/356. Please let me know your questions and comments.
Regards
Guogang Huang
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