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Re: [STDS-802-11-TGBF] basic question regarding fractional scaling factor



Thank you Steve for your response. Now the rationale makes sense to me.

thanks and regards

 

-Anirud

 

Anirudha (Anirud)  Sahoo (He/Him)

https://sites.google.com/view/a-sahoo

National Institute of Standards and Technology

Wireless Networks Division

Communications Technology Lab

100 Bureau Drive, Stop 6730

Gaithersburg, MD  20899

Ph: 301-975-4439

 

From: Steve Shellhammer <sshellha@xxxxxxxxxxxxxxxx>
Sent: Friday, March 18, 2022 12:18 PM
To: Sahoo, Anirudha (Fed) <anirudha.sahoo@xxxxxxxx>; stds-802-11-tgbf@xxxxxxxxxxxxxxxxx
Subject: RE: basic question regarding fractional scaling factor

 

Hi Anirud,

 

                It is my understanding that the 11n CSI report was never implemented in any products.  Beamforming took off in products starting with 11ac where a totally different report approach was used focused specifically on the beamforming matrices.

 

                A lower complexity approach to CSI formatting for the Sensing Measurement report enables a software implementation in many cases which will reduce the time-to-market for 11bf products, I would expect.

 

                I hope that answers your questions.

 

Regards,

Steve

 

From: Sahoo, Anirudha (Fed) <anirudha.sahoo@xxxxxxxx>
Sent: Friday, March 18, 2022 7:57 AM
To: stds-802-11-tgbf@xxxxxxxxxxxxxxxxx
Cc: Steve Shellhammer <sshellha@xxxxxxxxxxxxxxxx>
Subject: basic question regarding fractional scaling factor

 

Hi Steve,

  My apologies if this question has been asked/answered before.

Why are we trying to “simplify” the CSI quantization method? The 802.11n spec based “real valued scaling” is already available in commercial products, right? If yes, then vendors have already implemented the more complex real valued scaling based CSI reporting. If the implementation is already there and the accuracy is better than any of the proposals currently in tgbf, why simplify it? If we mandate a simpler, but less accurate method in the standard, then it would prevent vendors from implementing more accurate (albeit more complex) method for CSI.

 

thanks and regards

 

-Anirud

 

Anirudha (Anirud)  Sahoo (He/Him)

https://sites.google.com/view/a-sahoo

National Institute of Standards and Technology

Wireless Networks Division

Communications Technology Lab

100 Bureau Drive, Stop 6730

Gaithersburg, MD  20899

Ph: 301-975-4439

 


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