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    Interference discovery and cancellation for WLAN with full duplex radios
    13.
    发明授权
    Interference discovery and cancellation for WLAN with full duplex radios 有权

    公开(公告)号：US11937285B2

    公开(公告)日：2024-03-19

    申请号：US17978542

    申请日：2022-11-01

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： Hanqing Lou ,  Alphan Sahin ,  Oghenekome Oteri ,  Li-Hsiang Sun ,  Xiaofei Wang ,  Rui Yang

    IPC: H04B17/309 ,  H04W72/541

    CPC classification number: H04W72/541 ,  H04B17/309

    Abstract: Methods and apparatus for interference discovery for simultaneous transmission and reception are provided. In an embodiment, a station (STA) receives a STR request message from an access point (AP). The STA transmits a first STR response message to the AP based on the received STR request message. The STA receives a second STR response message transmitted from a second STA to the AP. The STA determines a received power of the received second STR response message. The STA receives a first trigger message from the AP. The first trigger message indicates a STA role field. The STA transmits interference information to the AP. The interference information is based on the determined received power. The STA role field comprises an indication of at least one or more of a primary STA and a secondary STA. The STA aggregates the interference report with a data transmission to the AP in response to the first trigger message.

    CHANNEL ACCESS SCHEMES FOR WIRELESS LOCAL AREA NETWORK (WLAN) WITH FULL-DUPLEX RADIOS
    15.
    发明申请
    CHANNEL ACCESS SCHEMES FOR WIRELESS LOCAL AREA NETWORK (WLAN) WITH FULL-DUPLEX RADIOS 有权

    公开(公告)号：US20230095822A1

    公开(公告)日：2023-03-30

    申请号：US18075978

    申请日：2022-12-06

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： Oghenekome Oteri ,  Hanqing Lou ,  Li Hsiang Sun ,  Alphan Sahin ,  Robert L. Olesen ,  Xiaofei Wang ,  Rui Yang

    IPC: H04L5/14 ,  H04W72/12 ,  H04W74/08

    Abstract: Methods and apparatuses are described herein for multiple access schemes for Wireless Local Area Network (WLAN) with full-duplex radios. For example, an access point (AP), in response to receiving a request to send (RTS) from a first station (STA), may transmit a full-duplex clear to send (FD CTS) to the first STA and a full-duplex request to send (FD RTS) to a second STA. In response to transmitting the FD RTS to the second STA, the AP may receive a clear to send (CTS) from the second STA. The AP may transmit, to both the first STA and the second STA, a FD trigger frame that includes scheduling information to enables FD communication with the first STA for uplink (UL) data and the second STA for downlink (DL) data at a same time. The scheduling information may include timing information and channel information for the FD communication.

    SYSTEMS AND METHODS FOR COLLISION RESOLUTION IN A WIFI OFDMA SYSTEM
    16.
    发明申请
    SYSTEMS AND METHODS FOR COLLISION RESOLUTION IN A WIFI OFDMA SYSTEM 有权

    公开(公告)号：US20220330344A1

    公开(公告)日：2022-10-13

    申请号：US17608789

    申请日：2020-05-04

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： Hanqing Lou ,  Alphan Sahin ,  Li Hsiang Sun ,  Xiaofei Wang ,  Rui Yang ,  Frank La Sita

    IPC: H04W74/08 ,  H04L5/00 ,  H04L27/26 ,  H04L1/18

    Abstract: Methods and system may be used for collision detection for orthogonal frequency division multiple access (OFDMA)-based random access. A wireless transmit/receive unit (WTRU) may receive, from an access point (AP), a first trigger frame triggering random access using OFDMA. The WTRU may transmit, to the AP, in response to the first trigger frame a trigger-based frame including user specific control information in a signal (SIG) field. The WTRU may receive an acknowledgment/negative acknowledgment (ACK/NAK) message indicating that the trigger-based frame was successfully detected at the AP or that the trigger-based frame was not successfully detected at the AP. The WTRU receive, from the AP, a scheduling retransmission frame including rescheduling information for STAs with corrupted UL transmissions. On a condition that the scheduling retransmission frame indicates that a collision of the trigger-based frame was detected, the WTRU may retransmit the trigger-based frame

    METHODS AND APPARATUS FOR MIMO TRANSMISSION
    18.
    发明申请
    METHODS AND APPARATUS FOR MIMO TRANSMISSION 有权

    公开(公告)号：US20220294515A1

    公开(公告)日：2022-09-15

    申请号：US17828984

    申请日：2022-05-31

    Applicant: InterDigital Patent Holdings, Inc.

    Inventor： Oghenekome Oteri ,  Alphan Sahin ,  Hanqing Lou ,  Li-Hsiang Sun ,  Rui Yang

    IPC: H04B7/06 ,  H04B7/0452 ,  H04W74/08

    Abstract: Methods for multiple input-multiple output (MIMO) transmission are provided herein. A method may include sensing, using at least one of a plurality of antenna chains, radio frequency (RF) energy on a channel in a first time duration and may indicate the channel is busy. RF energy may be sensed on the channel using the at least one of the plurality of antenna chains in a second time duration and may indicate the channel is not busy. A method may include sending energy level sensed during the second time duration, a frame using the at least one of the plurality of antenna chains. The frame may indicate timing information associated with a MIMO transmission. The MIMO transmission may be sent using the indicated timing information and the at least one of the plurality of antenna chains.

    METHODS FOR SUPPORTING BSS EDGE USER TRANSMISSIONS
    19.
    发明申请
    METHODS FOR SUPPORTING BSS EDGE USER TRANSMISSIONS 有权

    公开(公告)号：US20220217770A1

    公开(公告)日：2022-07-07

    申请号：US17610343

    申请日：2020-05-08

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： Li Hsiang Sun ,  Hanqing Lou ,  Alphan Sahin ,  Xiaofei Wang ,  Rui Yang ,  Frank La Sita

    IPC: H04W74/00 ,  H04W74/08 ,  H04W72/04 ,  H04W72/10 ,  H04B17/318

    Abstract: Methods and apparatuses for enhancing random access procedures are described herein. A method performed by an access point (AP) may comprise allocating a plurality of random access (RA) resource units (RA-RUs) for transmitting a message from a station (STA) to the AP over an upper or lower frequency band. The method may comprise transmitting, to a station (STA), one or more physical layer convergence procedure (PLCP) protocol data unit (PPDU) over the upper or lower frequency bands. Each of the one or more PPDUs may include a trigger frame, and the trigger frame may include an indication of the plurality of RA-RUs and a target received signal strength indicator (TRSSI) associated with at least one of the upper or lower frequency bands. The method may comprise receiving, in response to the trigger frame, the message from the STA in one of the plurality of RA-RUs.

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