On 2012-07-16 8:28 PM, Sujith Manoharan wrote: > Felix Fietkau wrote: >> The standard does not say anything specifically about A-MPDU, but it >> does say this: >> >> When the TXOP limit is nonzero, a STA shall fragment an individually >> addressed MSDU so that the transmission of the first MPDU of the TXOP >> does not cause the TXOP limit to be exceeded at the PHY rate selected >> for the initial transmission attempt of that MPDU. The TXOP limit may be >> exceeded, when using a lower PHY rate than selected for the initial >> transmission attempt of the first MPDU, for a retransmission of an MPDU, >> for the initial transmission of an MPDU if any previous MPDU in the >> current MSDU has been retransmitted, or for group addressed MSDUs. When >> the TXOP limit is exceeded due to the retransmission of an MPDU at a >> reduced PHY rate, the STA shall not transmit more than one MPDU in the TXOP. > > Um, am not sure how this passage relates to number of subframe calculation in an > aggregate ? The way I understand this, the TXOP limit is meant to limit the duration of a single transmission on the channel. An aggregate is transmitted in one go, there's no SIFS or extra PHY headers inbetween, just short delimiters. So an A-MPDU should be treated pretty much like an MPDU here, its transmission duration should not exceed the TXOP limit. - Felix -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
