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Re: [STDS-802-11-TGBE] Contribution 11-20/483 about preamble puncturing

Hi Oded,

 

Thanks for sharing. I am not a PHY guy, so I am not up-to date with the latest discussions in PHY. I have some clarification questions:

 

For SPs 1 and 2:

1) Do we already have a definition/agreement of the term “puncturing structure”?  

2) I am guessing, your assumption here is that the first 1 represents the Primary 20 MHz as the lowest (or the highest) 20 MHz channel, but it may not always be the case; P20 may also be the 2nd or the 3rd 20 MHz channel. So I am not sure if it is correct to use such a bitmap (1001, 1010) here. Perhaps it is better to spell out that the secondary 20 MHz and either one of the 20 MHz chanel of the seconday 40 MHz may be punctured.

 

Best Regards,

Rojan

 

From: Oded Redlich (TRC) <oded.redlich@xxxxxxxxxx>
Sent: Saturday, 4 April 2020 4:26 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBE] Contribution 11-20/483 about preamble puncturing

 

Hello PHY people,

 

I would like to share the SPs of contribution 11-20/483 and open it for discussion via the reflector. This contribution is scheduled for the coming CC on Monday.

In a nutshell, this contribution suggests to support more puncturing cases respective to 11ax in order to improve the channel utilization.

Any comments or suggestions are welcome

 

SP #1

  • Do you agree to allow puncturing structure 1001 in a given 80MHz segment for OFDMA PPDUs transmitted to STAs operating at BW>=80MHz?
    • Assuming 2 content channels are used
    • Puncturing signaling may be different for different 80MHz channels
    • In 802.11ax in such cases the BW drops to 20MHz

 

SP #2

  • Do you agree to allow puncturing structure 1010 in a given 80MHz segment for OFDMA PPDUs transmitted to STAs operating at BW>=80MHz?
    • Assuming 2 content channels are used
    • Puncturing signaling may be different for different 80MHz channels
    • In 802.11ax in such cases the BW drops to 20MHz

SP#3

  • Do you agree that U-SIG may include puncturing signaling/info about both 80MHz channels within each 160MHz channel?
    • Will be used only by devices that can decode pre-EHT on 160MHz
    • Will NOT affect the operation of STAs that decode pre-EHT on 80MHz
    • Applicable for BW=160,320MHz. For BW=240MHz applicable for P160 only
    • Signaling content is TBD

 

 

BR,

 

Oded Redlich

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