Hi Jay,
Thank you for initiating this email thread.
A non-AP MLD will have a mapping of an assigned AID w.r.t to an AP MLD. Therefore, the ambiguity that you are referring to will not occur.
In your example, when non-AP MLD prepares AP MLD 2 and receives AID=200, it will have an internal mapping of:
AID=100 w.r.t AP MLD 1 [and AP MLD 1’s affiliated APs]
AID=200 w.r.t AP MLD 2 [and AP MLD 2’s affiliated APs]
Therefore, during the transitory phase if the non-AP MLD were to receive a DL MU PPDU from affiliated AP of AP MLD 1, it will look for STA_ID=100. Similarly, it will look for AID/STA_ID=200 for TF or DL MU
from AP affiliated with AP MLD 2.
Regards,
Abhi
From: Jay Yang <yang.zhijie@xxxxxxxxxx>
Sent: Monday, March 24, 2025 6:31 PM
To: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBN] your contribution 24/656
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Hi Binita , All,
A lot of members show the interested in the AID assignment during the roaming procedure, let me initialize this mail thread.
Take the following figure as the example, non-AP MLD set up two links with the current AP MLD before roaming phase, and the current AP MLD assigns AID=100 to the non-AP MLD ,
During the roaming preparation/excuration phase, the Target AP MLD assigns a new AID(like AID=200) via the ML reconfiguration response frame you proposed.
The question is such new AID only applied on Link ID=1 but not Link ID=0 on non-AP MLD side, because link ID=0 is still used to received the DL traffic from the current AP MLD .
Once the AID on two links is updated to AID=200, the MU DL case (and TB UL case) don't work on the current AP MLD , as the current AP MLD has no ideas on the new AIDs unless we define
some synchronize between the two AP MLDs .
That's why I said the AID assignment must be
LINK level at this moment, that's, there is no AID update on the link associated with the current AP MLD.
Thanks
Best Regards
Jay Yang (杨志杰)
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