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Re: [STDS-802-11-TGBN] Discussion on CID4434

Hi Yajun,

In your example, what will be the type of the first PPDU from AP2 to STA2? What would be in the PPDU?

Thanks,
Yanjun

On Apr 6, 2026, at 6:53 PM, 程亚军 <000038d07d12e9a7-dmarc-request@xxxxxxxxxxxxxxxxx> wrote:

Hi Sanket，
 
CID4434 raised the interoperability issue between Co-TDMA and NPCA.
 
According to the current Resolution, I have the following concerns:
1.      To my knowledge, the current draft does not stipulate that the NPCA Minimum Duration Threshold must be greater than the Duration field in the Co-TDMA ICF. Is it your intention to introduce such restriction?
 
2.      Downlink transmission failure due to NPCA operation.
As illustrated in the following figure, once STA2 has enabled NPCA operations, it switches the NPCA primary channel at the beginning of the allocation phase. Consequently, if AP2 attempts to deliver DL PPDUs to STA2 during the allocation phase, the transmission will inevitably fail as STA2 is no longer operating on the BSS primary channel.
How can we ensure that NPCA STAs (such as STA2) remain on the primary channel until the end of the CO-TDMA allocation phase to avoid this transmission failure?
<image002.png>
 
Thanks
Yajun
发件人: Sanket Kalamkar <000033b8f79f2eb4-dmarc-request@xxxxxxxxxxxxxxxxx>
发送时间: 2026年4月5日 9:56
收件人: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
主题: [External Mail][STDS-802-11-TGBN] 11-26/316r0 uploaded
 

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Hi Alfred,
 
The document 11-26/316r0 is uploaded on the server. The document resolves 20 CIDs.
 
 
Co-TDMA TTT: Please let me know if you have any feedback on the document.
 
Best,
Sanket
 

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