39 Ahmadreza 25.5.2 Regarding "An UL Suggest to consider the Reject. Hedayat MPDU/A-MPDU is the case mentioned in this acknowledgement of the comment, and change In case any of the Trigger frame. When the AP this rule so that when at STAs replies, the receives MPDU correctly from least one STA with RU exchange is at least one STA indicated by assignment on the happening and AP trigger frame, the frame Primary 20MHz channel should keep exchange initiated by the responds then the UL receiving the frame. trigger frame is successful.", it MU transmission is Declaring it a failed seems this rule does not considered successful. exchange has consider the case where an AP consequences on schedules an UL MU the definition of transmission for multiple STAs, other related but the STA(s) that have behavior (e.g. assignmnets on the Primary backoff) 20MHz do not respond, in which case the primary channel could be idle for the duration of the PPDU in which case the medium could be grabbed by otehr OBSS STAs ... 40 Ahmadreza 25.5.2 "The inter frame space "The frame space Revised Hedayat between a PPDU that contains between a PPDU that a Trigger frame and the contains a Trigger frame triggered HE trigger-based or contains an HEC field PPDU is SIFS." with UL MU Scheduling and the triggered HE trigger-based PPDU is SIFS."
39 Ahmadreza Hedayat 25.5.2 Regarding "An UL MPDU/A-MPDU is the acknowledgement of the Trigger frame. When the AP receives MPDU correctly from at least one STA indicated by trigger frame, the frame exchange initiated by the trigger frame is successful.", it seems this rule does not consider the case where an AP schedules an UL MU transmission for multiple STAs, but the STA(s) that have assignmnets on the Primary 20MHz do not respond, in which case the primary channel could be idle for the duration of the PPDU in which case the medium could be grabbed by otehr OBSS STAs ... Suggest to consider the case mentioned in this comment, and change this rule so that when at least one STA with RU assignment on the Primary 20MHz channel responds then the UL MU transmission is considered successful. Reject. In case any of the STAs replies, the exchange is happening and AP should keep receiving the frame. Declaring it a failed exchange has consequences on the definition of other related behavior (e.g. backoff) 40 Ahmadreza Hedayat 25.5.2 "The inter frame space between a PPDU that contains a Trigger frame and the triggered HE trigger-based PPDU is SIFS." "The frame space between a PPDU that contains a Trigger frame or contains an HEC field with UL MU Scheduling and the triggered HE trigger-based PPDU is SIFS." Revised
11-16-0929-02-00ax-cr-ul-mu-operation.docx