Re: [STDS-802-11-TGBP] aSIFSTime definition

[Nelson Costa <nelson@xxxxxxxx>]

Hi Solomon, 

I think I may have caused some confusion.  My question specifically asked why we were running the straw poll.  I understood the SP to essentially say "we'll use the same value for SIFS that every other PHY already uses."  My comments stemming from that were "If it's already defined in the baseline, why are we SPing this?"  

I believe, based on your comments thus far, you're trying to say "We will likely write a value for aSIFSTime in our PHY clause.  I would therefore ask the group to agree that value will be written as 10 µs, similar to other PHYs."  Is that correct?

Cheers, 

Nelson.

  

On Wed, Mar 18, 2026 at 9:10 AM Solomon Trainin <solomon.trainin1@xxxxxxxxx> wrote:

Hi Nelson!

As I understand your comment, you believe the aSIFSTime definition shouldn't be included in the 802.11bp amendment.

If you refer to the base standard, you'll see that, with the exception of WUR PHY, the IEEE 802.11 standard includes the aSIFSTime value in every PHY definition. WUR PHY only defines DL PPDUs, so SIFS isn't required.

Below, you can see how the base standard defines aSIFSTime for each PHY in the 2.4 GHz band. (IEEE P802.11-REVmf/D2.0, February 2026)

In SP1 (DCN 11-26-0540-01-00bp), I propose following the base standard's approach in our amendment by including the definition of aSIFSTime.

 

PHY (2.4GHz)	aSIFSTime is in	aSIFSTime value (us)
DSSS	Table 15-5—DSSS PHY characteristics	10
HR/DSSS	Table 16-4—HR/DSSS PHY characteristics	10
ERP	Table 18-5—ERP characteristics	10
HT	Table 19-25—HT PHY characteristics	10
HE	Table 27-61—HE PHY characteristics	10
EHT	36.4.4 EHT PHY refers to Table 27-61 (HE PHY Characteristics and Table 19-25 (HT PHY characteristics).	10

 

 

Best Regards,

Solomon Trainin

+972547885738

 

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