unclear how an AP would even measure this. I am generally unhappy with this, I might make a presentation. CCCID31 1154 "The Estimated Air Change the cited Revise TGmd editor – Time Fraction subfield text to "The to make changes as Fischer is 8 bits in length and Estimated Air Time in 11-17/1192r21 contains an unsigned Fraction subfield is that are marked with integer that represents 8 bits in length and CID 1154. These contains an changes add a unsigned integer "beyond the scope of that represents this standard" the predicted language that says the percentage of time, computation should linearly scaled with include efficiency 255 representing the predicted scaling. 100%, that a new STA percentage of air joining the time (so not including interframe space), linearly scaled with 255 BSS will be allocated representing 100%, for PPDUs carrying that a new STA Data of the joining the corresponding AC for that STA." -- if you look at R.7 it turns out that this is exactly the BSS will be time for the PPDUs, allocated for not including any PPDUs carrying contention/IFS time. Data of the This is a very subtle corresponding AC point (and differs from for that STA (so not e.g. admission control) including any CCCID212 Management or Control frames)." 1155 R.7 The equation for At the end of the Revise TGmd editor – PPDU_Dur extremely referenced to make changes as Fischer pedantically accounts subclause add a shown in for symbol rounding ... "NOTE---The that are and then completely equations do marked with CID 1155, fails to account for not account for e.g. which adds a minimum delimiters. It A-MPDU delimiters delimiter count of 4 also includes the PHY and signal octets to the PPDUDur header but not the extension." equation, and adds a PHY trailer (e.g. signal note that indicates that extension) CCCID213 signal extension is not accounted for.
unclear how an AP would even measure this. I am generally unhappy with this, I might make a presentation. CCCID31 1154 Fischer "The Estimated Air Time Fraction subfield is 8 bits in length and contains an unsigned integer that represents the predicted percentage of time, linearly scaled with 255 representing 100%, that a new STA joining the BSS will be allocated for PPDUs carrying Data of the corresponding AC for that STA." -- if you look at R.7 it turns out that this is exactly the time for the PPDUs, not including any contention/IFS time. This is a very subtle point (and differs from e.g. admission control) CCCID212 Change the cited text to "The Estimated Air Time Fraction subfield is 8 bits in length and contains an unsigned integer that represents the predicted percentage of air time (so not including interframe space), linearly scaled with 255 representing 100%, that a new STA joining the BSS will be allocated for PPDUs carrying Data of the corresponding AC for that STA (so not including any Management or Control frames)." Revise – TGmd editor to make changes as in 11-17/1192r21 that are marked with CID 1154. These changes add a "beyond the scope of this standard" language that says the computation should include efficiency scaling. 1155 Fischer R.7 The equation for PPDU_Dur extremely pedantically accounts for symbol rounding ... and then completely fails to account for delimiters. It also includes the PHY header but not the PHY trailer (e.g. signal extension) CCCID213 At the end of the referenced subclause add a "NOTE---The equations do not account for e.g. A-MPDU delimiters and signal extension." Revise – TGmd editor to make changes as shown in that are marked with CID 1155, which adds a minimum delimiter count of 4 octets to the PPDUDur equation, and adds a note that indicates that signal extension is not accounted for.
11-17-1192-22-000m-cr-esp.docx