A-MPDU Contents Date: Authors: Nov 2016 Liwen Chu Marvell

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Presentation transcript:

A-MPDU Contents Date: 2016-11-06 Authors: Nov 2016 Liwen Chu Marvell Name Affiliation Address Phone Email Liwen Chu Marvell 5488 Marvell Lane, Santa Clara, CA, 95054 408-222-2500 liwenchu@marvell.com Liwen Chu, Marvell, et. al.

Recap of Trigger Frames Nov 2016 Recap of Trigger Frames Trigger frame can be Basic Trigger, MU-BAR Trigger, Beamforming Report Poll Trigger, MU-RTS, BSRP (Buffer Status Report Poll) Trigger. It is clear that MU-RTS can’t be aggregated in A-MPDU with data/management frames and/or control frame since MU-RTS can only be in legacy PPDU. It is clear Basic Trigger can be aggregated with data/management frames and/or control frame since the acknowledgement of DL A-MPDU is scheduled by Basic Trigger. Whether MU-BAR, Beamforming Report Poll Trigger, and BSRP can be aggregated with data/management frames should be clarified. Whether MU-BAR, Beamforming Report Poll Trigger, and BSRP can be aggregated with control frames should be clarified. Liwen Chu, Marvell, et. al.

Trigger Aggregation with data frames Nov 2016 Trigger Aggregation with data frames Liwen Chu, Marvell, et. al.

MU-BAR, Beamforming Report Poll Trigger and BSRP Nov 2016 MU-BAR, Beamforming Report Poll Trigger and BSRP MU-BAR in SU PPDU can ask for acknowledgement from multiple STAs. MU-BAR is not allowed to be aggregated with data frame since If unicast data frames in A-MPDU ask for immediate acknowledgement, Ack Policy 00 should be used. Disallowing MU-BAR is similar to disallow BAR. It is not necessary to aggregate broadcast data frames and MU-BAR to destine to different STAs. Beamforming Report Poll Trigger is used for ask for sounding feedback from beamformees. Beamforming Report Poll Trigger is not allowed to be aggregated with data frame since This makes sounding procedure complicated. Liwen Chu, Marvell, et. al.

MU-BAR, Beamforming Report Poll Trigger and BSRP Nov 2016 MU-BAR, Beamforming Report Poll Trigger and BSRP MU-BAR, Beamforming Report Poll Trigger and BSRP BSRP asks for buffer status from STAs. Option 1: BSRP Trigger is not allowed to be aggregated with data frame since With Basic Trigger aggregated with data frames in DL A-MPDU, the STA of the DL A-MPDU receiver can report buffer status if there is remaining medium time after acknowledgement transmission. A separate BSRP can always be sent separately. Option 2: BSRP Trigger is allowed to be aggregated with data frame if the receiver announce that it supports such aggregation If BSRP Trigger is aggregated with data frames and data frames ask for acknowledgment, the STA shall transmit acknowledgement first. The remained medium time is used for buffer status report through HE Control field or QoS Mull frames. Liwen Chu, Marvell, et. al.

Trigger Aggregation with Control frames Nov 2016 Trigger Aggregation with Control frames Liwen Chu, Marvell, et. al.

MU-BAR, Beamforming Report Poll Trigger and BSRP Nov 2016 MU-BAR, Beamforming Report Poll Trigger and BSRP Beamforming Report Poll Trigger is not allowed to be aggregated with control frame since This makes sounding procedure complicated. MU-BAR is not allowed to be aggregated with control frame since BA + MU BAR is not normal. Liwen Chu, Marvell, et. al.

MU-BAR, Beamforming Report Poll Trigger and BSRP Nov 2016 MU-BAR, Beamforming Report Poll Trigger and BSRP MU-BAR, Beamforming Report Poll Trigger and BSRP BSRP asks for buffer status from STAs. Option 1: BSRP Trigger is not allowed to be aggregated with control frame since With Basic Trigger aggregated with data frames in DL A-MPDU, the STA of the DL A-MPDU receiver can report buffer status if there is remaining medium time after acknowledgement transmission. A separate BSRP can always be sent separately. Option 2: BSRP Trigger is allowed to be aggregated with control frame if the receiver announce that it supports such aggregation If BSRP Trigger is aggregated with data frames and data frames ask for acknowledgment, the STA shall transmit acknowledgement first. The remained medium time is used for buffer status report through HE Control field or QoS Mull frames. Liwen Chu, Marvell, et. al.

MU-BAR, Beamforming Report Poll Trigger and BSRP Summary Nov 2016 MU-BAR, Beamforming Report Poll Trigger and BSRP Summary In order to simplify the implementation, we propose to disallow aggregating Beamforming Report Poll Trigger, MU-BAR in A-MPDU with other control, data/management frames to allow aggregating BSRP with other control, data/management frames in A-MPDU as optional in RX Liwen Chu, Marvell, et. al.