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Hi Qisheng, Maybe to rephrase my statement I would ask a different question. What is the incentive for an AP that has 320 MHz operating BW to shrink it to 160 MHZ because that’s the only overlapping part with the other
CoBF AP? In that case each AP loses half its BW and gains it back in the form of CoBF gain but likely with some residual interference. Let alone the sounding overhead. Regards, Sherief From: Qisheng Huang <huang.qisheng@xxxxxxxxxx>
WARNING:
This email originated from outside of Qualcomm. Please be wary of any links or attachments, and do not enable macros. Hi Sherief, First of all, thank you for your attention and comments. About the BW losing, actually there will be no BW losing but beamforming performance degradation for those none over-lapping parts in some worst cases. For the left BW not measured in
overlapping BW sounding, APs could also acquire relevant channel response through memory，legacy sounding procedure or channel reciprocity（Not accurate therefore may be degradation）. Then about the different BW Co-BF use cases, not the APs but also the STAs could have different BW. Besides, BW used for communication varies under different channel conditions, not
to mention there may be channel puncture. Above all, it is suggested to provide some flexibilites to meet complicated implementations at acceptable negotiation cost. Thanks
Best Regards
Qisheng Huang
Original From: SheriefHelwa <shelwa@xxxxxxxxxxxxxxxx> To: 黄启圣10306060;STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
<STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx>; Date: 2025年06月07日
02:04 Subject: RE: [STDS-802-11-TGBN] Reminder: Technical Submissions Queues Hi Qisheng, Thanks for preparing these SPs. I agree in principle that CoBF should be allowed only for overlapping BW. But my question would be is it worth it for 2 APs of different BW to operate in CoBF mode together?
Each one may be losing BW if it did so, right? Regards, Sherief From: Qisheng Huang <huang.qisheng@xxxxxxxxxx>
WARNING:
This email originated from outside of Qualcomm. Please be wary of any links or attachments, and do not enable macros. Hi Alfred, I have one defered SP requested to be run in PHY in May. Could you help add it to current agenda (related submission has already been presented)? SP:
Do you agree to include overlapping bandwidth sounding in 11bn?
- The relevant indications and frame exachanges are TBD. additionally, according to offline discussions I made a follow up ： https://mentor.ieee.org/802.11/dcn/25/11-25-1024-00-00bn-overlapping-bandwidth-sounding-for-coordinated-beamforming-follow-up.pptx
Qisheng Huang (ZTE) incorporated with the SP2 : Do you agree to include overlapping bandwidth sounding in 11bn? The overlapping bandwidth could be negotiated through exchange of invite/response frames before the transmission of UHR NDPA. The sounding bandwidth announced by UHR NDPA might be less than the operating bandwidth of the UHR beamformee. Please help add the techinical submission and the SP2 to the agenda too , and remove the following contribution from the agenda: 25/120 Frame Format Design for High-Priority EDCA Many appreciates for your assistance. Thanks
Best Regards
Qisheng Huang
Original From: AlfredAsterjadhi <asterjadhi@xxxxxxxxx> Date: 2025年06月05日
00:17 Subject: [STDS-802-11-TGBN] Reminder: Technical Submissions Queues Hello all, Please consider this as a gentle reminder regarding the announcement made during the Joint telco of last week:
·
Authors of technical submissions are invited to review the technical submissions queues and are requested to:
§
Send a request for removal of the submission from the queue, if the concepts in the submission are planned to (or are) being handled via a CR/PDT.
§
Upload the contribution and send an e-mail to the TGbn chair to update the link to the contribution by the end of this week (Sunday, June 7th, 2025).
Submissions that have not been uploaded by then and have not been requested to update the link to the document, will be removed from the technical submission queue. Regards,
-- Alfred Asterjadhi, PhD IEEE802.11 TGbe/TGbn Chair, Qualcomm Technologies Inc. Cell #: +1 858 263 9445 Office #: +1 858 658 5302 To unsubscribe from the STDS-802-11-TGBN list, click the following link:
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