公开(公告)号：US20230262770A1

公开(公告)日：2023-08-17

申请号：US18165807

申请日：2023-02-07

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

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

IPC: H04W74/08 ,  H04W72/1268

CPC classification number: H04W74/0816 ,  H04W72/1268 ,  H04W74/0833

Abstract: Wireless IEEE 802.11 communication mechanisms are described for a member STA of a R-TWT SP to gain TXOP channel access before the R-TWT SP, which does not need to end before the start time of the R-TWT SP. On trigger based R-TWT SP, the TXOP time is shared to overlap the R-TWT SP; allowing the AP to behave as the TXOP holder for the frame exchange of latency sensitive traffic during the R-TWT SP. Thus, the R-TWT scheduling AP and member STAs of a R-TWT SP can contend for the channel together before the scheduled start time of the R-TWT SP. When one of these STAs gains channel access, it can reserve a TXOP until the scheduled end time of the R-TWT SP, which may extend beyond the normal TXOP limit.

公开(公告)号：US20230199844A1

公开(公告)日：2023-06-22

申请号：US18064645

申请日：2022-12-12

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

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

IPC: H04W74/08

CPC classification number: H04W74/0816

Abstract: A wireless IEEE 802.11 communication protocol under CSMA/CA for enhanced full duplex (FD) station (STA) operations. PPDU preambles are configured to incorporate STA identification and corresponding resource unit (RU) or multiple resource unit (MRU) information. An FD AP indicates STA identification and corresponding RU/MRU index of a transmission destination in the FD preamble of a downlink (DL) PPDU; while a FD non-AP STA indicates its own STA identification and corresponding RU/MRU index in the FD preamble of a uplink (UL) PPDU. The disclosed technology mitigates many issues in regard to fake collisions, partial RU fake collisions, and real collisions, toward improving communications and efficiency and reducing latencies.

公开(公告)号：US20230122711A1

公开(公告)日：2023-04-20

申请号：US17936725

申请日：2022-09-29

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

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

IPC: H04W74/08

Abstract: Method and apparatus for supporting simultaneous MultiUser (MU) Multiple-Input Multiple-Output (MIMO) operations utilizing Orthogonal Frequency Division Multiple Access (OFDMA) with Uplink OFDMA Random Access (UORA). Access Points (APs) trigger and obtain short PPDUs from the stations to learn spatial filtering patterns that are utilized in adjusting antenna phase differences to obtain minimum/maximum energy from this BSR. The APs determine favored and unfavored directions of communication, which are conveyed to non-AP UORA stations as channel estimation signals. The UORA stations base broadcasting on strengths of channel estimation signals to determine eligible UORA resource units. The UORA procedure to secondary APs allows a primary AP to trigger a UL-MU MIMO transmission with the number of spatial streams exceeding the number of antennas at the primary AP.

公开(公告)号：US20220174732A1

公开(公告)日：2022-06-02

申请号：US17390979

申请日：2021-08-01

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Qing Xia ,  Mohamed Abouelseoud ,  Liangxiao Xin

IPC: H04W74/08 ,  H04W16/14

Abstract: A wireless local area network (WLAN) protocol allowing a Transmit Opportunity (TXOP) holder, whether its an AP or non-AP STA, to share the TXOP with other stations, that are either AP or non-AP STAs. An intent to share the TXOP is communicated by the TXOP holder either directly or indirectly with other STAs and/or AP, after which scheduling information (time and duration) are shared with the STAs and/or AP. When the TXOP occurs, the STAs and/or AP can access the channel at the time and for the duration specified, thus providing increased use of the TXOP to improve efficiency.

公开(公告)号：US20250089086A1

公开(公告)日：2025-03-13

申请号：US18813752

申请日：2024-08-23

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Qing Xia

IPC: H04W74/0816 ,  H04L5/00 ,  H04W74/04 ,  H04W84/12

Abstract: A wireless protocol for providing smooth roaming when a non-Access Point (non-AP) Multi-Link Device (MLD) roams between Basic Service Sets (BSSs). One or more links of a roaming non-AP MLD can be in the process of communicating latency sensitive traffic during a R-TWT SP of a first BSS while roaming to a target BSS. Negotiation is made with the AP MLD of the target BSS so that upon completion of roaming to the target BSS, one or more links of the roaming non-AP MLD are allowed to use a predetermined/enhanced R-TWT SP of the target BSS without further negotiation.

公开(公告)号：US20250063502A1

公开(公告)日：2025-02-20

申请号：US18749128

申请日：2024-06-20

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Qing Xia ,  Salvatore Talarico

IPC: H04W52/02 ,  H04W84/12

Abstract: A coordinated form of R-TWT SP scheduling taking into account the needs of non-AP STAs in adjacent BSS. A flag in the BSSID field is used to indicate if the AP is represented by the BSSID is a UHR AP. Mechanisms are described to support coordinated R-TWTs and the operation of UHR devices supporting these coordinated R-TWT. The protocol for UHR AP and UHR non-AP STAs allows for identifying possible interference with the OBSS, directly rescheduling, or performing negotiation with the UHR AP of the OBSS for scheduling the R-TWT SP.

公开(公告)号：US12075471B2

公开(公告)日：2024-08-27

申请号：US17390979

申请日：2021-08-01

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

Inventor： Qing Xia ,  Mohamed Abouelseoud ,  Liangxiao Xin

IPC: H04W74/0808 ,  H04W16/14 ,  H04W84/12

CPC classification number: H04W74/0808 ,  H04W16/14 ,  H04W84/12

Abstract: A wireless local area network (WLAN) protocol allowing a Transmit Opportunity (TXOP) holder, whether its an AP or non-AP STA, to share the TXOP with other stations, that are either AP or non-AP STAs. An intent to share the TXOP is communicated by the TXOP holder either directly or indirectly with other STAs and/or AP, after which scheduling information (time and duration) are shared with the STAs and/or AP. When the TXOP occurs, the STAs and/or AP can access the channel at the time and for the duration specified, thus providing increased use of the TXOP to improve efficiency.

公开(公告)号：US20230269788A1

公开(公告)日：2023-08-24

申请号：US18169624

申请日：2023-02-15

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

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

IPC: H04W74/08

CPC classification number: H04W74/0866 ,  H04W74/0816 ,  H04W84/12

Abstract: An adaptive set of RTA Adaptive EDCA rules and structures are provided to allow non-AP STAs to transmit RTA packets inside a R-TWT SP. The RTA Adaptive EDCA Parameter Set can be selected in response to receiving a trigger from the associated AP, or by pre-configuration. Non-AP STAs, as R-TWT member or non-member of the current R-TWT SP, can switch from using the regular EDCA parameters to the new RTA Adaptive EDCA parameters inside the R-TWT SP. Various rules are described for duration of use, while the AP can prevent STAs from using the new RTA Adaptive EDCA at any time inside of the R-TWT SP.

公开(公告)号：US20230199847A1

公开(公告)日：2023-06-22

申请号：US18067978

申请日：2022-12-19

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

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

IPC: H04W74/08 ,  H04W74/00

CPC classification number: H04W74/0816 ,  H04W74/006

Abstract: Enhanced R-TWT scheduling is performed in which the R-TWT scheduling AP can perform scheduling quickly to react quickly to changes in the network environment and optimize R-TWT scheduling for efficiency and stability. The R-TWT scheduling AP transmits R-TWT trigger frames and is able to collect information from R-TWT scheduled STAs which may affect R-TWT scheduling. The scheduling can take into account that some member STAs may be dozing (asleep) for several beacon intervals and do not wake up for the beacon, then the R-TWT scheduling AP initiates the update of parameters when needed to check on those STAs to determine if any updates are needed. The R-TWT trigger frame can allocate resource units (RU) for R-TWT scheduled STAs to communicate back to the R-TWT scheduling AP.

公开(公告)号：US20230199846A1

公开(公告)日：2023-06-22

申请号：US18067972

申请日：2022-12-19

Applicant: SONY GROUP CORPORATION ,  SONY CORPORATION OF AMERICA

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

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

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

Abstract: A wireless communication apparatus, method or protocol for wireless STAs using CSMA/CA on a wireless local area network (WLAN). A receiver STA receives MSDUs or A-MSDUs which include an expiration time, from a transmitter STA. The receiver STA stores the MSDUs or A-MSDUs with expiration time in its receive reordering buffer of the corresponding high-throughput (HT)-immediate block acknowledgement (Ack) agreement. The receiver STA passes the MSDU or A-MSDU to a next MAC process before an expiration time of the MSDU or A-MSDU. Thus, the percentage of latency sensitive traffic packets being communicated prior to expiration is increased.