[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?
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.
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.
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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