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    Methods and system for MIMO transmissions in millimeter wave WLANs
    12.
    发明授权
    Methods and system for MIMO transmissions in millimeter wave WLANs 有权

    公开(公告)号：US11349546B2

    公开(公告)日：2022-05-31

    申请号：US16621133

    申请日：2018-06-14

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

    IPC: H04B7/06 ,  H04B7/0452 ,  H04W74/08 ,  H04W84/12

    Abstract: Methods and an apparatus are disclosed for orthogonal frequency division multiplexing (OFDM) and/or single carrier (SC) based multiple input multiple output (MIMO) hybrid beamforming (HBF) including determining the capabilities of a station (STA) such as the capability for hybrid beamforming, single user MIMO (SU-MIMO), and multi user MIMO (MU-MIMO). An announcement frame with a control trailer may be transmitted to signal a transmission configuration. The announcement frame may be a grant frame or a request to send (RTS) frame if the STA is SU-MIMO capable or a RTS frame or a DMG clear to send (CTS)-self frame if the STA is MU-MIMO capable. One or more directional multi-gigabit (DMG) antennas may be configured based on the announcement frame. One or more sounding symbols may be transmitted and feedback may be provided based on the sounding symbols. An HBF signal may be transmitted based on the sounding symbol(s) and/or feedback.

    Multi channel multiple input multiple output beamforming training in millimeter wave systems
    13.
    发明授权
    Multi channel multiple input multiple output beamforming training in millimeter wave systems 有权

    公开(公告)号：US11283491B2

    公开(公告)日：2022-03-22

    申请号：US16628839

    申请日：2018-07-06

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

    IPC: H04B7/0452 ,  H04B7/0417

    Abstract: Systems, methods, and devices for beamforming (BF) training are disclosed. In some examples, a receiver is configured to receive sector sweep (SSW) training frames from an initiator device that each indicate an antenna sector of the initiator device. A transmitter is configured to transmit sector sweep (SSW) training frames to the initiator device that indicate a best received antenna sector of the initiator device. The receiver receives a sector sweep feedback (SSW FB) frame from the initiator device, and the transmitter transmits transmit a sector sweep acknowledgement (SSW ACK) frame to the initiator device that indicates an antenna sector of the initiator device that is different from the antenna sector indicated by the SSW FB frame, if the SSW FB frame was best received by an antenna not corresponding to the best received antenna sector of the initiator device.

    MIMO channel access
    14.
    发明授权
    MIMO channel access 有权

    公开(公告)号：US11245443B2

    公开(公告)日：2022-02-08

    申请号：US16611188

    申请日：2018-05-03

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

    IPC: H04B7/06 ,  H04B7/0417 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0456 ,  H04B7/08 ,  H04W80/08

    Abstract: A single input single output (SISO) data transmission may solicit a multiple input multiple output (MIMO) rank adaptation information. A number of transmit chain for transmission may be determined, e.g., by an access point (AP). A physical layer convergence procedure (PLCP) protocol data unit (PPDU) may be transmitted, e.g., to a station (STA). The PPDU may include data and training (TRN) sequences. The number of TRN sequences may be equal to the number of transmit chains. The PPDU may include information associated with the determined number of transmit chains for transmission. Feedback may be received, e.g., from the STA. The feedback may include information that identifies a transmit chain associated with the transmitted TRN sequences and/or a channel measurement associated with the identified transmit chain. A subsequent PPDU may be transmitted based on the channel measurement associated with the identified transmit chain from the received feedback.

    MULTI-LINK STEERING AND CONTROL IN WLAN
    18.
    发明公开
    MULTI-LINK STEERING AND CONTROL IN WLAN 审中-公开

    公开(公告)号：US20230308938A1

    公开(公告)日：2023-09-28

    申请号：US18019330

    申请日：2021-08-06

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： Li Hsiang Sun ,  Hanqing Lou ,  Xiaofei Wang

    IPC: H04W28/02 ,  H04W76/20

    CPC classification number: H04W28/0278 ,  H04W76/20 ,  H04W84/12

    Abstract: Methods and apparatus for multi-link (ML) steering and control in wireless local area network (WLAN) are disclosed. A station (STA) multi-link device (MLD) may communicate over a plurality of links. The STA MLD may receive, from an access point (AP) MLD, on a first link of the plurality of links, a first frame comprising a ML element, where the ML element includes pausing information indicating a period of time during which the STA MLD will pause transmission and reception on the first link. The STA MLD may send, to the AP MLD, on a second link of the plurality of links and during the indicated period of time, uplink (UL) traffic, wherein the first link and the second link are multi-directional links. The STA MLD may be non-simultaneous transmit and receive (non-STR), and the AP MLD may be capable of STR.

    CHANNEL ACCESS SCHEMES FOR WIRELESS LOCAL AREA NETWORK (WLAN) WITH FULL-DUPLEX RADIOS
    19.
    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
    20.
    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

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