公开(公告)号：US20230199845A1

公开(公告)日：2023-06-22

申请号：US18067963

申请日：2022-12-19

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Li-Hsiang Sun ,  Mohamed Abouelseoud ,  Liangxiao Xin ,  Qing Xia

IPC: H04W74/08 ,  H04L1/1607 ,  H04L5/00

CPC classification number: H04W74/0816 ,  H04L1/1621 ,  H04L5/0055 ,  H04W84/12

Abstract: A wireless communication protocol which operates with multi-link devices (MLDs) having simultaneous transmit and receive (STR) link pairs to allow transmitting a long MU PPDU by an originator on a first link, which is acknowledged (Ack) by a recipient on a second link. The Ack on the second link may be on a single resource unit (RU) which may be shared by multiple stations. The Ack may be received during the MP PPDU on the first link, making it a quick Ack. In many cases this allows the originator to perform a retransmission within the same PPDU, thus especially benefitting real-time traffic which is latency sensitive.

公开(公告)号：US20230199647A1

公开(公告)日：2023-06-22

申请号：US18056709

申请日：2022-11-17

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Qing Xia ,  Mohamed Abouelseoud ,  Li-Hsiang Sun ,  Liangxiao Xin

IPC: H04W52/02 ,  H04W74/08

CPC classification number: H04W52/0216 ,  H04W74/0816 ,  H04W84/12

Abstract: New reverse direction (RD) protocols for EHT devices during reserved target wait time (R-TWT) service periods (SPs). In this protocol the R-TWT scheduling AP does not have to trigger the RD initiator when it performs as the RD responder, and can trigger TB PPDU(s). In addition, the RD initiator is enabled to inform the RD initiator to inform its non-AP peer STA about the R-TWT information in the transmitted RD PPDU. The RD initiator is enabled to send a new MU RD PPDU to both the R-TWT scheduling AP and the non-AP peer STA, which allows the AP to quickly takeover scheduling if the non-AP peer STA is a non-RTWT member and has limited access the in current ongoing R-TWT SP.

公开(公告)号：US20230139168A1

公开(公告)日：2023-05-04

申请号：US18049285

申请日：2022-10-24

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Liangxiao Xin ,  Mohamed Abouelseoud ,  Li-Hsiang Sun ,  Qing Xia

IPC: H04W72/12 ,  H04W74/08 ,  H04W76/15 ,  H04W52/02

Abstract: A wireless protocol CSMA/CA and scheduling SPs of a R-TWT for RTA frame exchange. In addition to link level scheduling, R-TWTs can be scheduled from an MLD level. An R-TWT scheduling MLD is configured to schedule a Multi-Link (ML) R-TWT with SP scheduled on multiple links. These ML R-TWTs can be one or more SL R-TWTs, and a ML R-TWT can be an independent R-TWT from the SL R-TWT. The R-TWT scheduling MLD can: (a) assign a unique ML level R-TWT ID to identify a ML R-TWT, and if a ML R-TWT consists of SL R-TWTs each SL R-TWT is assigned to a unique link level R-TWT ID to identify it on its link; and (b) complete ML R-TWT signaling on one link for the ML R-TWT management on multiple links.

公开(公告)号：US20230055895A1

公开(公告)日：2023-02-23

申请号：US17814450

申请日：2022-07-22

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Li-Hsiang Sun ,  Mohamed Abouelseoud ,  Liangxiao Xin ,  Qing Xia

IPC: H04L5/16 ,  H04L5/00 ,  H04W56/00

Abstract: Full-duplex (FD) enhancements for three scenarios with multiple APs/BSSs. (1) Multiple-AP joint transmissions on a WLAN. Toward eliminating self-interferences and other issues, certain pilot signals in the PPDU are transmitted only by the primary AP. One or more secondary APs participating in the joint transmission receive the pilots to correct their clock in the following symbols. (2) Communications are performed with extended OFDM symbols sent on a second channel which facilitate NAV decoding for stations transmitting on a first channel. (3) More than one AP can perform a joint Ack/BA to a UL PPDU. The secondary AP may utilize its full duplex capability to determine the difference of receiving status between itself and the primary AP, and forward data to the primary which it had not received.

公开(公告)号：US20210410163A1

公开(公告)日：2021-12-30

申请号：US17152536

申请日：2021-01-19

Applicant: SONY CORPORATION

Inventor： Qing Xia ,  Mohamed Abouelseoud ,  Liangxiao Xin

IPC: H04W72/12 ,  H04W72/08 ,  H04W72/00 ,  H04W72/04 ,  H04W74/02

Abstract: A wireless network communications protocol to allow sharing transmit opportunities (TXOP) in the same basic service set (BSS), or an overlapping basic service set (OBSS) over at least one channel. Sharing offer and request information is exchanged with an access point (AP) station, which shares this with APs on overlapping BSSs. Information is exchanged between stations advertising that a coming TXOP is available to be shared, and identifying stations that are willing to join it. Resource unit (RU) distributions are determined for the participant stations to use in sharing the TXOP, while the AP of the OBSS performs scheduling and distribution of RUs for stations in the OBSS.

公开(公告)号：US20250142619A1

公开(公告)日：2025-05-01

申请号：US18816241

申请日：2024-08-27

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Qing Xia ,  Salvatore Talarico

IPC: H04W74/0816 ,  H04W74/08 ,  H04W84/12

Abstract: Providing conflict resolution between beacon transmission and Restricted-Target Wake Time (R-TWT) Service Periods (SPs) to enhance IEEE 802.11 protocols, especially for Extra High Throughput (EHT) Access Points (APs). After determining if a beacon will overlap the start of a TXOP and whether the beacon or R-TWT SP transmission has higher priority; the AP resolves the conflict such as to start or continue the R-TWT TID and embed the beacon frame within the transmitted frame, or to limit the TXOP to provide for transmitting the beacon frame at the proper timing.

公开(公告)号：US12225584B2

公开(公告)日：2025-02-11

申请号：US17679798

申请日：2022-02-24

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Liangxiao Xin ,  Mohamed Abouelseoud ,  Li-Hsiang Sun ,  Qing Xia

IPC: H04W74/08 ,  H04L5/00 ,  H04W48/16 ,  H04W72/04 ,  H04W72/53 ,  H04W74/0816

Abstract: A wireless protocol performing Restricted Target Wait Time (R-TWT) signaling and its parameters to reduce latency, such as for real-time application traffic. Further control of traffic flow is provided during the R-TWT Service Period (SP), including whether: R-TWT SP can be extended, multiple overlapped R-TWT SPs on different links can be started, spatial reuse is required during R-TWT SP, allowance of transmission outside R-TWT SP, or use of Quiet element to protect R-TWT SP, whereby R-TWT operation (mode) is described with enhanced operations. Protocol is applicable to Wireless Local Area Networks (WLANs), and is especially well suited for 802.11be 802.11ax, Real-Time Application (RTA) traffic such as on time sensitive networks, Wi-Fi and on Multi-Link Devices (MLDs).

公开(公告)号：US20240224323A1

公开(公告)日：2024-07-04

申请号：US18498146

申请日：2023-10-31

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Qing Xia

IPC: H04W74/08

CPC classification number: H04W74/0808

Abstract: A Central Unit (CU) is connected to multiple Remote Radio Heads (RRHs) over a backhaul. The spatial separation of units creates long round-trip times, which are addressed in the present disclosure. The enhanced operation allows for counting down a BackOff (BO) on either the RRH side or on the CU side. RRHs that perform the BO procedure can resolve the issue of insufficient InterFrame Space (IFS) time for the RRH to obtain Data from the CU and to invoke a BO. In addition, RRHs that perform the BO procedures are able to reduce channel access contention when multiple RRHs are performing BOs, while utilization efficiency for the medium can also be increased by the improved synchronization of BO and Clear Channel Assessment (CCA) status between the CU and RRHs.

公开(公告)号：US20240007860A1

公开(公告)日：2024-01-04

申请号：US18206680

申请日：2023-06-07

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Li-Hsiang Sun ,  Liangxiao Xin ,  Qing Xia

IPC: H04W12/122 ,  H04W74/08 ,  H04W12/76

CPC classification number: H04W12/122 ,  H04W88/10 ,  H04W12/76 ,  H04W74/0816

Abstract: Enhanced wireless protocols are described for stations (STAs) which are associated with Multiple-Link Devices (MLD). One embodiment describes overcoming replay attacks (with or without a modified Sequence Number (SN) even when protected by a Group Temporal Key (GTK) or similar. Other embodiments describe MLP operating enhancements associated with utilizing a Robust Security Network Element (RSNE), or NSTR Mobile AP MLD, or Target Beacon Transmission Time (TBTT) Information fields with Reduced Neighbor Reports (RNR), or Quiet Channel elements in an Association/Reassociation, or that use PPDU end alignment are all subject to specific shortcomings when applied to MLDs.

公开(公告)号：US20230254897A1

公开(公告)日：2023-08-10

申请号：US18150935

申请日：2023-01-06

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Liangxiao Xin ,  Li-Hsiang Sun ,  Mohamed Abouelseoud ,  Qing Xia

IPC: H04W74/08 ,  H04L5/00

CPC classification number: H04W74/0816 ,  H04L5/0055 ,  H04W84/12

Abstract: An enhanced method of handling block Acks, such as for latency sensitive traffic streams, for which a separate block Ack mechanism is established, which is separate from other traffic in the same TID. With this separate block Ack mechanism the recipient STA can have an independent receive reordering buffer control for latency sensitive traffic, so that the MSDU or A-MSDU of latency sensitive traffic can be passed to the next MAC process in order of increasing sequence number of the MSDUs or A-MSDUs since those MSDUs and A-MSDUs have the same QoS requirement, such as the latency time. This mechanism reduces the chances of latency sensitive traffic being stuck in a receive reordering buffer behind other traffic in the TID and having its traffic expire.