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Re: [STDS-802-11-TGBE] Discussion on CID 17494

Hi Zinan, Jinyoung and Bin,

I think Bin's or Zinan's proposed text changes are similar. I have another opinion as follows.

The paragraphs and tables in P212L42-P214L65 elaborate on how to determine the subcarrier indices that need to be fed back. Tables 9-127b/9-127c/9-127d are the look up tables of the subcarrier indices of different RU sizes (RU242 or RU996) and grouping factor (Ng). These tables alone do not show how the subcarrier indices are determined. They are used to determine the subcarrier indices that need to be fed back. The mapping from the Partial BW Info subfield to the subcarrier indices that need to be fed back follows the rules described in P212L57-L65 and P213L55-L62. Therefore, better to make the following additional change on top of Bin's proposed text change:

The EHT Compressed Beamforming Report information contains the channel matrix elements indexed, first, by matrix angles in order shown in Table 9-71 (Order of angles in the compressed beamforming feed­back matrix when used in a non-S1G band), and second, by data and pilot subcarrier index from the lowest frequency to the highest frequency for all the subcarrier indices that need to be fed back based on the Partial BW Info subfield and determined (in case of MRU the lowest frequency stands for the lowest frequency of  first RU and the highest frequency stands for the highest frequency of the last RU) using as shown in Table 9-127b (Subcarrier indices when not all bits in Partial BW Info subfield corresponding to the 80 MHz frequency subblock are set to 1), Table 9-127c (Subcarrier indices when all bits in Partial BW Info subfield corre­sponding to the 80 MHz frequency subblock are set to 1 for Ng = 4), and Table 9-127d (Subcarrier indices when all bits in Partial BW Info subfield corresponding to the 80 MHz frequency subblock are set to 1 for Ng = 16).


Best Regards,
Alice Chen
Qualcomm


On Fri, Mar 17, 2023 at 2:01 PM Zinan Lin <000019c80da359b9-dmarc-request@xxxxxxxxxxxxxxxxx> wrote:

Hi Jinyoung and Bin,

 

I totally agree with Bin’s philosophy and suggestion. However, “determined” seems a bit redundant because it already has “based on the Partial BW Info subfield ”. So I am wondering if we can remove “and determined”. Or can we say

 

“for all the subcarrier indices that need to be fed back based on the Partial BW Info subfield and determined by as shown in”?

 

Thanks,

Zinan

 

The EHT Compressed Beamforming Report information contains the channel matrix elements indexed, first, by matrix angles in order shown in Table 9-71 (Order of angles in the compressed beamforming feed­back matrix when used in a non-S1G band), and second, by data and pilot subcarrier index from the lowest frequency to the highest frequency for all the subcarrier indices that need to be fed back based on the Partial BW Info subfield and determined as shown in Table 9-127b (Subcarrier indices when not all bits in Partial BW Info subfield corresponding to the 80 MHz frequency subblock are set to 1), Table 9-127c (Subcarrier indices when all bits in Partial BW Info subfield corre­sponding to the 80 MHz frequency subblock are set to 1 for Ng = 4), and Table 9-127d (Subcarrier indices when all bits in Partial BW Info subfield corresponding to the 80 MHz frequency subblock are set to 1 for Ng = 16).

 

 

From: Jinyoung Chun <jiny.chun@xxxxxxx>
Sent: Tuesday, March 14, 2023 4:14 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] Discussion on CID 17494

 

 

Hi Bin,

 

Thank you for your suggestion, and it looks clearer to me.

If somebody has any opinion, please let me know.

 

Best regards,

Jinyoung

 

From: Bin Tian [mailto:btian@xxxxxxxxxxxxxxxx]
Sent: Wednesday, March 15, 2023 4:10 AM
To: jiny.chun@xxxxxxx; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: RE: [STDS-802-11-TGBE] Discussion on CID 17494

 

Hi Jinyoung

The term MRU brings more confusion since the feedback tone indices are solely determined based on a partial BW bitmap. Among all these tones need to be fed back, we just order them based on the frequency from low to high.  How about using the following text

The EHT Compressed Beamforming Report information contains the channel matrix elements indexed, first, by matrix angles in order shown in Table 9-71 (Order of angles in the compressed beamforming feed­back matrix when used in a non-S1G band), and second, by data and pilot subcarrier index from the lowest frequency to the highest frequency for all the subcarrier indices that need to be fed back based on the Partial BW Info subfield and determined (in case of MRU the lowest frequency stands for the lowest frequency of  first RU and the highest frequency stands for the highest frequency of the last RU) as shown in Table 9-127b (Subcarrier indices when not all bits in Partial BW Info subfield corresponding to the 80 MHz frequency subblock are set to 1), Table 9-127c (Subcarrier indices when all bits in Partial BW Info subfield corre­sponding to the 80 MHz frequency subblock are set to 1 for Ng = 4), and Table 9-127d (Subcarrier indices when all bits in Partial BW Info subfield corresponding to the 80 MHz frequency subblock are set to 1 for Ng = 16).

Thanks,

Bin

 

From: Jinyoung Chun <jiny.chun@xxxxxxx>
Sent: Tuesday, March 14, 2023 11:47 AM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBE] Discussion on CID 17494

 

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

Hi, All,

 

I’ve presented CRs on 9.4.1.71 in Joint CC and the CID was deferred for more discussion.

Please let me know your opinion about the CID.

 

17494

Brian Hart

T

211.65

"(in case of MRU the lowest frequency stands for the lowest frequency of first RU and the highest frequency stands for the highest frequency of the last RU) " is actually very confusing. The Tables do not shed any light either.

If the first RU is lowest in freq and the last RU is highest in freq then this explanation unnecessarily and confusinglyu introduces RU numbering in an MRU - just have "(including for MRUs, noting that tones between RUs in an MRU are not fed back)". If the first/last RU is not necessarily lowest/highest in freq then, a) provide a xref to where this is are explained and b) rewrite this: "... second by the numbering of each RU in the MRU and third by data and pilot subcarrier index in each RU from the lowest freq to the highest freq ..."

Revised

 

Agree with the commenter, and the first suggestion seems good because the first RU is lowest in freq and the last RU is highest in freq (refer Table 36-5 (Data and pilot subcarrier indices for RUs).

 

To editor: Change the text in P211L65-P212L1

“(in case of MRU the lowest frequency stands for the lowest frequency of first RU and the highest frequency stands for the highest frequency of the last RU)”

to

“(including for MRUs, noting that tones between RUs in an MRU are not fed back)”

 

Best regards,

Jinyoung

 

From: Jinyoung Chun [mailto:jiny.chun@xxxxxxx]
Sent: Tuesday, March 14, 2023 8:45 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] [EXT] [STDS-802-11-TGBE] Teleconference Agendas For Next Week: Uploaded

 

Hi Alfred,

 

Please add the following 3 CRs in the Queue.

  • 11-23-0359-00-00be-lb271-cr-on-36.3.12.10 (PHY)
  • 11-23-0365-00-00be-lb271-cr-on-9.4.1.70 (Joint)
  • 11-23-0367-00-00be-lb271-cr-on-9.4.1.71 (Joint)

 

Best regards,

Jinyoung

 

From: Yan(MSI) Zhang [mailto:yan.zhang_5@xxxxxxx]
Sent: Tuesday, March 14, 2023 12:34 AM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] [EXT] [STDS-802-11-TGBE] Teleconference Agendas For Next Week: Uploaded

 

Hi Alfred,

 

  Could you please add the following 2 CR documents to 11be PHY queue?

 

23/0422r0    11be lb271 CR for Clause 36.3.11 Mathematical description of signals    Yan Zhang (NXP Semiconductor)

23/0427r0    11be lb271 CR for clause 36.3.13.3 Coding  Yan Zhang (NXP Semiconductor)

 

Thanks

Yan

 

 

From: Alfred Asterjadhi <asterjadhi@xxxxxxxxx>
Sent: Saturday, March 4, 2023 7:36 AM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [EXT] [STDS-802-11-TGBE] Teleconference Agendas For Next Week: Uploaded

 

Caution: EXT Email

Hello all,

 

I uploaded the telco agendas for the upcoming week.

- Mar 6                              Monday          – MAC/PHY                          19:00-21:00 ET

- Mar 8                              Wednesday    – Joint                                 10:00-12:00 ET

 

Link: https://mentor.ieee.org/802.11/dcn/23/11-23-0269-00-00be-jan-mar-tgbe-teleconference-agenda.docx

 

We will use these telcos to review and continue LB comment assignments.

 

Let me know if you have any questions. 

 

Regards,


Alfred

--

Alfred Asterjadhi, PhD

IEEE802.11 TGbe Chair,

Qualcomm Technologies Inc.

Cell #:    +1 858 263 9445

Office #: +1 858 658 5302

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