TB PPDU is used for determine the SRP value instead of the Trigger frame in the SRP PPDU, the STA may issue a as well. There are two more "due to the receipt of a SRP PPDU" in the same paragraph (P345L35 and L45) and they seems to be redundant too. Yoshio 346.50 The meaning of Replace "should be Revise TGax editor – Urabe "Acceptable Receiver set to the ambient to make changes as Interference noise plus shown in 11-18/1410r4 Level_AP" seems to interference power that are marked with be wrong. level observed at CID 17083, which The sentence says, in the AP immediately remove the noise plus short, prior to the interference term and Acceptable Receiver transmission of the substitute UL Target Interference Level = Trigger frame plus RSSI which should Recent (N+I) + the minimum SNR already have been Requred SNR (except value that yields ... calculated to account the margin), ensuing uplink HE for the N+I term and which seems to be a TB PPDU, minus a changes plus to minus required RSSI, not an safety margin value to get a noise limit, acceptable ..." with which might very well interference level. It "should be set to be equal to N+I, while should be: the minimum value leaving the safety (Acceptable Receiver among the values margin adjustment in Interference Level + of (the value of UL place. Note that the Recent (N+I)) = Target RSSI minus equation could just Received Signal the minimum SNR state that the Power - Required value that yields ... Acceptable SNR, ensuring uplink HE interference is N+I where the sum in the TB PPDU) for each minus safety margin, left term is performed User Info field but this does not in true value, not in assigned within the account for a case dB. bandwidth when the AP might This can be rewritten corresponding to suggest a target RSSI as: the SRP field of the that includes a safety Acceptable Receiver Trigger frame, margin already. Interference Level (dB) minus a safety = margin value ...". Signal Power - Required SNR) / 10) - 10^((Recent (N+I) / 10)). The "Received Signal Power" above should be derived from UL Target RSSI for each user. So we should calculate Acceptable Receiver Interference
TB PPDU is used for determine the SRP value instead of the Trigger frame in the SRP PPDU, the STA may issue a as well. There are two more "due to the receipt of a SRP PPDU" in the same paragraph (P345L35 and L45) and they seems to be redundant too. Yoshio Urabe 346.50 The meaning of "Acceptable Receiver Interference Level_AP" seems to be wrong. The sentence says, in short, Acceptable Receiver Interference Level = Recent (N+I) + Requred SNR (except the margin), which seems to be a required RSSI, not an acceptable interference level. It should be: (Acceptable Receiver Interference Level + Recent (N+I)) = Received Signal Power - Required SNR, where the sum in the left term is performed in true value, not in dB. This can be rewritten as: Acceptable Receiver Interference Level (dB) = Signal Power - Required SNR) / 10) - 10^((Recent (N+I) / 10)). The "Received Signal Power" above should be derived from UL Target RSSI for each user. So we should calculate Acceptable Receiver Interference Replace "should be set to the ambient noise plus interference power level observed at the AP immediately prior to the transmission of the Trigger frame plus the minimum SNR value that yields ... ensuing uplink HE TB PPDU, minus a safety margin value ..." with "should be set to the minimum value among the values of (the value of UL Target RSSI minus the minimum SNR value that yields ... ensuring uplink HE TB PPDU) for each User Info field assigned within the bandwidth corresponding to the SRP field of the Trigger frame, minus a safety margin value ...". Revise – TGax editor to make changes as shown in 11-18/1410r4 that are marked with CID 17083, which remove the noise plus interference term and substitute UL Target RSSI which should already have been calculated to account for the N+I term and changes plus to minus to get a noise limit, which might very well be equal to N+I, while leaving the safety margin adjustment in place. Note that the equation could just state that the Acceptable interference is N+I minus safety margin, but this does not account for a case when the AP might suggest a target RSSI that includes a safety margin already.
11-18-1410-05-00ax-lb233-cr-spatial-reuse.docx