Re: [STDS-802-11-TGBN] Please review - the last few seamless roaming CID

Thread Links	Date Links
Thread Prev	Thread Next	Thread Index	Date Prev	Date Next	Date Index

Hi Guogang, Pooya, and all,

Thanks for your comment. I expect the current AP MLD indicates the proper Next DL SN to the target AP MLD (based on the buffered data and the new data expected from the DS). Pooya added clarification below that says the target does not start transmitting the new DL data (from the DS) until it receives the Notify frame from the STA that indicates DL drain termination in this case.

"NOTE ― If the amount of buffered or anticipated additional DL data in the current AP MLD for a TID exceeds the block ack window size during the DL draining period, the next SN to be assigned for DL individually addressed Data frames (during context transfer) might be outside the non-AP STA's block ack window, in which case the target AP MLD will not be able to transmit the new MSDUs/A-MSDUs from the DS to the non-AP MLD until receiving from the non-AP STA a UHR Link Reconfiguration Notify frame with the Type field set to 2 and the DL Draining Completed field set to 1."

@Pooya Monajemi, please correct me if my understanding is wrong.

Thanks,

Duncan

From: huangguogang <huangguogang1@xxxxxxxxxx>
Sent: Monday, July 13, 2026 8:53 AM
To: Duncan Ho <dho@xxxxxxxxxxxxxxxx>; STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx <STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx>
Subject: 回复: [STDS-802-11-TGBN] Please review - the last few seamless roaming CIDs

WARNING: This email originated from outside of Qualcomm. Please be wary of any links or attachments, and do not enable macros.

Hi Duncan,

Thanks for preparing this CR document. I have a question on the following note. If the next SN to be assigned for DL individually addressed Data frames (during context transfer) might be outside the block ack window, does the target AP MLD have a way to know that? We need to add the text to clarify this part.

NOTE ― If the amount of buffered DL data in the current AP MLD for a TID exceeds the block ack window size during the DL draining period, the next SN to be assigned for DL individually addressed Data frames (during context transfer) might be outside the block ack window, in which case the target AP MLD will not be able to transmit the new MSDUs/A-MSDUs from the DS to the non-AP MLD until the Next SN becomes part of the block ack window.

Regards

Guogang Huang

发件人: Duncan Ho <00002b3e54cff3e2-dmarc-request@xxxxxxxxxxxxxxxxx>
发送时间: 2026年7月13日 23:45
收件人: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
主题: [STDS-802-11-TGBN] Please review - the last few seamless roaming CIDs

Dear seamless roaming TTT members,

We're at the very last stretch. These are the last few CIDs scheduled for Wed AM2 Joint session.

10062 is a deferred CID but the rest have not been presented before. Could you please let me know if you have any feedback before the presentation?

Thanks!

Duncan

To unsubscribe from the STDS-802-11-TGBN list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBN&A=1

Re: [STDS-802-11-TGBN] Please review - the last few seamless roaming CIDs