Re: [STDS-802-11-TGBN] Revised resolution for CID 6106

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Hi All,

Thank you for the offline feedback. I discussed this with some of you. Let me reiterate the motivation behind the NOTE.

There are 3 driving factors:

UL frame restriction toward current AP MLD (see 11.3.1, State 4c)

During DL draining, the non-AP MLD is in State 4c with the current AP MLD. Clause 11.3.1 already restricts UL to Control frames and UHR Reconfiguration Notify frames only. The NOTE refers to this for clarity.

PS mode w.r.t target AP MLD links for all non-AP MLDs (see 37.15.6.5)

Upon successful ST preparation, the non-AP MLD's affiliated STAs on the target AP MLD's links are in power save / doze state. This is applicable to all non-AP MLDs (i.e., not limited to a single-radio non-AP MLD).

Single-radio vs. multi-radio behavior during DL draining

Given (2), the single-radio-specific issue is signaling temporary unavailability toward the target AP MLD while receiving DL from the current AP MLD. An EMLSR non-AP MLD faces the same constraint. A multi-radio non-AP MLD can receive from both APs concurrently and can exit PS mode on the target AP MLD's links as needed.

The proposed updated note:

(#6106) NOTE — During the downlink draining period (State 4c with the current AP MLD):

A single-radio non-AP MLD can use the PS mode indication toward the target AP MLD to signal its temporary unavailability while receiving DL frames from the current AP MLD, since it cannot simultaneously receive from both APs.
A multi-radio non-AP MLD can receive from both the current AP MLD and the target AP MLD concurrently. Its affiliated STAs on the target AP MLD's links are in power save mode (see 37.15.6.5) and can exit power save mode as needed.

https://mentor.ieee.org/802.11/dcn/25/11-25-2366-09-00bn-lb291-cr-for-cids-assigned-to-abhi-37-16-part-2.docx

Please let me know if you have additional suggestions.

Regards,

Abhi

From: Abhishek Patil <0000297b717f2a04-dmarc-request@xxxxxxxxxxxxxxxxx>
Sent: Thursday, July 2, 2026 2:27 PM
To: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBN] Revised resolution for CID 6106

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Hi All,

We discussed resolution for CID 6106 during the TGbn MAC call on 29^th. The resolution was deferred for further discussions. Since then, I’ve been receiving offline feedback on that topic, and I have revised the resolution based on the inputs received so far. In addition, I have included CID 12437 in my doc as it is related to the same issue.

Here’s the revised text for the NOTE:

NOTE - During the DL draining period, a non-AP MLD can use power save mode on its setup link(s) with the target AP MLD to manage its frame exchanges with the current AP MLD and the target AP MLD. The following additional considerations apply depending on the capabilities of the non-AP MLD:

- A multi-radio non-AP MLD can simultaneously receive DL data frames from the current AP MLD on one link and exchange frames with the target AP MLD on another link.

- A non-AP MLD operating in EMLSR mode with the current AP MLD can manage DL reception from the current AP MLD by choosing not to respond to an ICF sent by the current AP MLD.

- A single-radio non-AP MLD that does not support EMLSR must complete or terminate early the DL draining period with the current AP MLD before initiating frame exchanges with the target AP MLD.

https://mentor.ieee.org/802.11/dcn/25/11-25-2366-08-00bn-lb291-cr-for-cids-assigned-to-abhi-37-16-part-2.docx

Could you please review the updated text and let me know if you have any additional feedback?

Regards,
Abhi

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