公开(公告)号：US20240314621A1

公开(公告)日：2024-09-19

申请号：US18606226

申请日：2024-03-15

Applicant: Apple Inc.

Inventor： Wook Bong LEE ,  Anuj BATRA ,  Zhou LAN ,  Mohamed ABOUELSEOUD ,  Chitlo CHOSH

IPC: H04W28/02 ,  H04W72/1268 ,  H04W72/566 ,  H04W84/12

CPC classification number: H04W28/0236 ,  H04W72/1268 ,  H04W72/569 ,  H04W84/12

Abstract: Disclosed herein are apparatuses and a method for implementing latency reduction using preemption within a physical layer (PHY) protocol data unit (PDU) (PPDU). An embodiment operates by encoding a multi-user PPDU (MU-PPDU) for transmission, where, the MU-PPDU comprises a plurality of aggregated media access control (MAC) PDUs (A-MPDUs) addressed to respective non-low-latency stations (non-LL-STAs). Based on a determination that low-latency data addressed to a low-latency station (LL-STA) is available for transmission at a MAC layer of the AP, the embodiment then transmits a preemption-indicator signal to the LL-STA and at least one non-LL-STA. Further, the embodiment identifies an A-MPDU of the plurality of A-MPDUs that is scheduled for transmission over a resource unit (RU) designated for transmitting low-latency data. The embodiment then replaces at least one non-low-latency MPDUs (non-LL-MPDUs) associated with the A-MPDU with at least one low-latency MPDUs (LL-MPDUs) addressed to the LL-STA to generate an updated A-MPDU., where a first LL-MPDU of the plurality of LL-MPDUs is a multi-user block acknowledgment request (MU-BAR) frame associated with the LL-MPDUs. Finally, the embodiment transmits the updated A-MPDU consisting the at least one LL-MPDUs over the RU.