Re: [STDS-802-11-TGBE] CID 13863 in doc 11-22/1978

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Hi Yongho,

See my comments below.

Thanks

Best Regards

Jay Yang

From: Yongho Seok <yongho.seok@xxxxxxxxx>
Sent: 2023年1月10日 4:08
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] CID 13863 in doc 11-22/1978

Hi Abhi,

Can't the AP MLD switch the operating channel of one link from 6GHz to 5GHz? Because we have E-CSA, changing the opening class is possible. Probably, it is allowed.

In such a case, the STA of the STA MLD associated with that link can't use the HT and VHT PPDU in 5GHz after completing the operating channel switching from 6GHz to 5GHz? According to the proposed text, the STA MLD can't provide the HT and VHT capabilities in the Association time.

à<Jay> I understand there is no much difference for EHT STA or HE STA to switch the operation channel from 6GHz to 5GHz. Take HE STA as an example, HE STA will carry the HT/VHT CAP after it switches the channel from 6GHz to 5GHz. But during the channel switching procedure(6GHz to 5GHz), as there is no VHT/HT STA associated with, and it’s unnecessary to send HT/VHT PPDU.

My point it the HT/VHT is only carried when the HE STA actually operating on non-6G band. If the rule for HE STA is true, EHT STA should inherit such rule without any change.

In the MLD, we should provide the HT and VHT capabilities regardless of whether the reported STA is STA 6G or not. Because it can operate at 5GHz later.

à<Jay> If the reported AP is not on 5GHz, why carry HT or VHT CAP? I understand the HT/VHT Cap can be dynamically added and removed.

Thanks,

Yongho

2023년 1월 9일 (월) 오전 7:29, Abhishek Patil <appatil@xxxxxxxxxxxxxxxx>님이 작성:

Hi Laurent,

Thank you for your email.

There two issue that we need to address with respect to the current sentence in the spec (note the sentence is a ‘shall’):

An EHT STA that is a STA 6G does not include HT/VHT Cap IE. An EHT STA that is not a STA 6G does not include HE 6 GHz Band Cap IE.
An EHT STA includes the IEs for a reported STA based on the reported STA’s capabilities.

Note, MBSSID case is not an issue since Op/Cap IEs are common to the set (i.e., not carried in the nonTxBSSID profile).

The revised the text to capture the intention. Please let me know if you have additional inputs.

Regards,
Abhi

From: Cariou, Laurent <laurent.cariou@xxxxxxxxx>
Sent: Monday, January 9, 2023 2:25 AM
To: Abhishek Patil <appatil@xxxxxxxxxxxxxxxx>; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: RE: CID 13863 in doc 11-22/1978

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

Hi Abhi,

Yes, how to set the fields in Multi-Link element is described elsewhere, so the Note is not needed.

I you want to make it clear that the sentence is for describing the BSS and not a reported BSS for MLO, you can add (it transmits “outside the Multi-Link element”), but it’s already quite clear as the sentence says “to include the channel width it is capable of supporting”. Note that maybe the sentence is not fully right when using MBSSID (something to check).

Thanks

Laurent

From: Abhishek Patil <appatil@xxxxxxxxxxxxxxxx>
Sent: Friday, January 6, 2023 6:30 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBE] CID 13863 in doc 11-22/1978

Hi Yongho, Laurent, All,

During yesterday's TGbe MAC call, I proposed the following resolution for CID 13863 in doc 11-22/1978.

There were some concerns expressed about the new paragraph (sentence related to reported STA – highlighted in the snippet below).

I am fine to delete the new (highlighted) paragraph since clause 35.3.3 provides guidance on the conditions for inclusion and contents of a per-STA profile for a reported STA.

Clause 35.15 can focus on the contents of the transmitting (i.e., reporting) STA’s frame.

Could you please let me know if the removal of the new paragraph addresses your concerns and/or if you have other suggestions?

CID 13863 included for reference:

13863

Sanghyun Kim

35.16.1

531.41

When the EHT STA transmits the Supported Channel Width Set subfield in the Per-STA profile corresponding to the other STA, the subfield shall be set in consideration of the capabilities of the other STA.

As in comment.

Regards,
Abhi

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