Re: [STDS-802-11-TGBN] CR for seamless roaming UL suspension and state changes

[Frank Hsu (徐建芳) <00001a0499b52dff-dmarc-request@xxxxxxxxxxxxxxxxx>]

Hi, Duncan,

 

Thanks for preparing the document.

One question regarding when the target AP MLD entering the State 4, in the text below, it looks the target AP MLD shall enter State 4 once the current AP MLD receives an STA execution request, and the target AP MLD has been prepared.

However, in the table in your discussion and to my understanding, the target AP MLD should enter State 4 until the ST execution response is successfully sent.

Could you clarify it? Thanks!

 

BRs,

Frank 

 

37.16.6 SMD BSS transition execution procedure via the current AP MLD

If the current AP MLD receives an ST execution request within the timeout value described in 37.16.5.2 (Target links preparation) and the target AP MLD has been prepared for SMD BSS transition for the non-AP MLD as described in 37.16.5 (SMD BSS transition preparation procedure), then:

—     The current AP MLD shall transfer any context that is required per 37.16.8 (Context) and has not already been transferred to the target AP MLD (if any) (#10413)and stop transmitting any Class 3 management frames to the non-AP MLD.

—     (#10413)The target AP MLD shall enter State 4 from State 3 (see 11.3.1 (State variables)) with the non-AP MLD.

 

 

Case 1: ST execution via the current AP MLD

 

	Current AP MLD			Target AP MLD
	DL	UL		DL	UL
Target Unprepped	4	4		1	1
Target prepped	4	4		State 3 but disallow Class 3 (3a1)	State 3 but disallow Class 3 (3a1)
After ST Exec Req is sent and before ST Exec Resp is received	State 4 but disallow Class 3 mgmt (4a2)	State 4 but disallow Class 3 (4a)		State 3 but disallow Class 3 (3a1)	State 3 but disallow Class 3 (3a1)
ST Exec Resp received and DL draining period in effect	State 4 but disallow Class 3 except data, control (4b3,4)	State 4 but disallow Class 3  (4b3)		44	4
DL draining terminated	1	1		4	4

 

From: Duncan Ho <00002b3e54cff3e2-dmarc-request@xxxxxxxxxxxxxxxxx>
Sent: Monday, January 12, 2026 12:30 AM
To: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBN] CR for seamless roaming UL suspension and state changes

 

External email : Please do not click links or open attachments until you have verified the sender or the content.

Dear Seamless Roaming TTT members,

 

I’ve drafted this CR to address the UL data suspension and  MLD state change. Could you please review it and let me know if you have any feedback?

Hope to see you in Victoria!

 

BR,

Duncan

 

 

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