公开(公告)号：US20230232456A1

公开(公告)日：2023-07-20

申请号：US18092684

申请日：2023-01-03

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Ahmad Reza Hedayat ,  Oghenekome Oteri ,  Hanqing Lou ,  Mahmoud Taherzadeh Boroujeni ,  Xiaofei Wang ,  Rui Yang ,  Shahrokh Nayeb Nazar

IPC: H04W74/08 ,  H04L5/00 ,  H04W52/34 ,  H04W16/14

CPC classification number: H04W74/0816 ,  H04L5/0053 ,  H04W52/34 ,  H04W72/23 ,  H04L5/0091 ,  H04W72/0446 ,  H04L5/0082 ,  H04W16/14

Abstract: Methods, systems, and devices for channel access and listen-before-talk approaches for new radio operation in unlicensed bands and/or licensed bands. A gNB and a wireless transmit/receive unit (WTRU) may operate in unlicensed spectrum. The gNB may perform listen-before-talk operation, and when successful, may send a downlink control channel with a slot format indication (SFI) to the WTRU. There may also be a handshaking procedure with an exchange of a request to transmit (RTT) and a request to receive (RTR). Prior to receiving the downlink channel, the WTRU may monitor search spaces at a first level, and once the downlink channel is received the WTRU may monitor search spaces at a second level. At the end of transmission, the WTRU may revert back to monitoring search spaces at the first level. In one example, the first level may be a mini-slot level and the second level may be a slot level.

公开(公告)号：US11678382B2

公开(公告)日：2023-06-13

申请号：US17509915

申请日：2021-10-25

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Xiaofei Wang ,  Hanqing Lou ,  Guodong Zhang

IPC: H04W74/08 ,  H04W48/18 ,  H04W76/10 ,  H04W48/16 ,  H04W84/12

CPC classification number: H04W74/0833 ,  H04W48/16 ,  H04W48/18 ,  H04W76/10 ,  H04W84/12

Abstract: Systems, methods, and instrumentalities are disclosed for concurrent link setup and downlink data retrieval, e.g., for high efficiency WLAN. An access point (AP) may send a trigger element that allocates a resource for pre-association transmissions with the AP. The trigger element may allocate the resource for random access and/or deterministic access. The AP may receive, from an unassociated STA, a first frame via one or more resource units (RUs) allocated in the trigger element. The AP may determine a pre-association identifier (PID) that identifies the unassociated STA. The AP may send the PID to the unassociated STA, for example, in the trigger element or in the multi-STA ACK. The AP may send a second frame associated with a multi-user (MU) transmission that includes the PID. The AP may send a trigger frame that includes the PID.

公开(公告)号：US11678318B2

公开(公告)日：2023-06-13

申请号：US17719023

申请日：2022-04-12

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Pengfei Xia ,  Oghenekome Oteri ,  Hanqing Lou ,  Nirav B. Shah ,  Monisha Ghosh ,  Robert Olesen

IPC: H04B7/0417 ,  H04B7/0491 ,  H04B7/06 ,  H04L1/00 ,  H04W16/28 ,  H04W84/12 ,  H04W72/044

CPC classification number: H04W72/046 ,  H04B7/0417 ,  H04B7/0491 ,  H04B7/063 ,  H04B7/0617 ,  H04L1/00 ,  H04W16/28

Abstract: A method and apparatus may be used to support coordinated and cooperative sectorized transmissions. Power control and clear channel assessment for sectorized transmissions may be used, along with sectorized beacon and associated procedures. Transmissions in a network may be protected by a first access point (AP) sending an omni-directional transmission and a beamformed or sectorized transmission to a station (STA), an overlapping basic service set (OBSS) confirming a spatially orthogonal (SO) condition based on the omni-directional transmission, and a second AP monitoring the omni-directional transmission and confirming the SO condition. The STA may be configured to receive a request-to-send (RTS) frame indicating data is available for transmission, and transmit a cooperative sectorized (CS) clear-to-send (CTS) frame indicating an ability for multiple AP reception.

公开(公告)号：US11611414B2

公开(公告)日：2023-03-21

申请号：US16213633

申请日：2018-12-07

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Monisha Ghosh ,  Nirav B. Shah ,  Sudheer A. Grandhi ,  Ronald G. Murias ,  Guodong Zhang ,  Xiaofei Wang ,  Hanqing Lou ,  Robert L. Olesen

IPC: H04L5/00 ,  H04L1/00 ,  H04L25/02

Abstract: Method and apparatus for transmission and reception of a Greenfield preamble are provided. In the method and apparatus, the Greenfield preamble may be a single user (SU) preamble or a multi user (MU) preamble. As an MU preamble, the Greenfield preamble includes a short training field (STF), a first long training field (LTF), a first signal (SIG) field, at least one additional LTF, and a second SIG field. Additionally, the Greenfield preamble may be utilized for efficient transmission and reception of control information to wireless devices, whereby the control information may be indicated using the STF, the first LTF, or the first or second SIG fields.

公开(公告)号：US11588536B2

公开(公告)日：2023-02-21

申请号：US17730631

申请日：2022-04-27

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Hanqing Lou ,  Xiaofei Wang ,  Oghenekome Oteri

IPC: H04B7/06 ,  H04B7/08 ,  H04B17/12 ,  H04W72/0446 ,  H04W74/00 ,  H04B7/0413 ,  H04W72/044

Abstract: Presently disclosed are systems and methods for beamforming training in WLANs. In various embodiments, there are unified MIMO beamforming training procedure, which includes a training period in which an initiator transmits multiple unified training frames for performing a transmit-beamforming training of the initiator and a receive-beamforming training of one or more responders; a feedback period in which each responder replies with a beamforming-feedback response; and an acknowledgement period during which the initiator transmits respective acknowledgement frames to the one or more responders from which responses were received. Rules for restricted random access in various slots of the feedback period may be implemented, to address response contention between multiple qualifying responders.

公开(公告)号：US11575416B2

公开(公告)日：2023-02-07

申请号：US17093924

申请日：2020-11-10

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0426 ,  H04L25/02 ,  H04W72/08

Abstract: A method implemented by a wireless transmit/receive unit (WTRU) having multiple antennas includes determining, by the WTRU, information that is associated with a baseband channel and that indicates any of measurement information and channel information, and transmitting, by the WTRU, a signal for requesting baseband beam tracking, on condition that any of: (1) the WTRU determines, according to the indicated information, that: (i) system performance is degraded in a hybrid beamforming transmission, and (ii) re-estimation of the baseband channel is part of a current link adaptation procedure, and (2) detailed baseband channel information was not part of a multiple-in multiple-out (MIMO) setup procedure.

公开(公告)号：US20220353821A1

公开(公告)日：2022-11-03

申请号：US17868047

申请日：2022-07-19

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Xiaofei WANG ,  Li-Hsiang Sun ,  Hanqing Lou ,  Oghenekome Oteri ,  Joseph S. Levy ,  Rui Yang ,  Alphan Sahin

IPC: H04W52/02

Abstract: Methods and apparatuses are described herein for network discovery. A wireless transmit/receive unit (WTRU) may transmit, to a first access point (AP), via a Primary Connectivity Radio (PCR), a request indicating that on a condition that the WTRU is disassociated from the first AP, the WTRU will enter a wake-up radio (WUR) only discovery mode. The WTRU may receive, from the first AP, via the PCR, a management frame that has WUR discovery elements including an indication of at least one channel used by a second AP. The WTRU may perform disassociation from the first AP. The WTRU may activate a WUR and deactivate the PCR. On a condition that the WTRU is disassociated from the first AP, the WTRU may receive, from the second AP, via the WUR, a WUR frame over the at least one channel to enable the WTRU to activate the PCR to initiate association.

公开(公告)号：US20220303890A1

公开(公告)日：2022-09-22

申请号：US17834615

申请日：2022-06-07

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Sudheer A. Grandhi ,  Lei Wang ,  Guodong Zhang ,  Xiaofei Wang ,  Monisha Ghosh ,  Hanqing Lou

IPC: H04W48/20 ,  H04W48/16

Abstract: A method for beacon information provisioning, transmissions and protocol enhancements includes defining multiple level beacons based on the attributes of beacon information fields/elements. A short beacon may be used in addition to a primary beacon in space-time block code (STBC) modes, non-STBC modes and in multiple bandwidth modes. The short beacons may also be used for Fast Initial Link Setup (FILS) and to extend system coverage range. Beacon transmissions may use adaptive modulation and coding set/scheme (MCS).

公开(公告)号：US20220255693A1

公开(公告)日：2022-08-11

申请号：US17626543

申请日：2020-07-10

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Hanqing Lou ,  Li-Hsiang Sun ,  Rui Yang ,  Joseph S. Levy ,  Xiaofei Wang

IPC: H04L5/00 ,  H04W24/10

Abstract: Methods and apparatuses are described herein for feedback based midamble adaptation. For example, a first station (STA) may transmit, to a second STA, a request frame that includes an indicator indicating a request for midamble information. The first STA may receive, from the second STA, a response frame that includes the midamble information determined by the second STA based on one or more channel measurements associated with the second STA. The midamble information may include a midamble report, a Doppler measurement report, or the like. The midamble report or the Doppler measurement report may include at least one of a midamble periodicity, a mobility/Doppler level, or the like. Based on the midamble information, the first STA may generate a physical layer convergence procedure (PLCP) protocol data unit (PPDU) that includes at least one midamble within a data portion of the PPDU.

公开(公告)号：US11405820B2

公开(公告)日：2022-08-02

申请号：US16450347

申请日：2019-06-24

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Fengjun Xi ,  Hanqing Lou ,  Oghenekome Oteri ,  Nirav B. Shah ,  Robert L. Olesen ,  Yuan Sheng Jin ,  Pengfei Xia ,  Frank La Sita ,  Guodong Zhang

IPC: H04W28/06 ,  H04W72/12 ,  H04L1/16 ,  H04L1/18 ,  H04L5/00 ,  H04B7/0452 ,  H04W28/04 ,  H04L1/00 ,  H04W84/12

Abstract: Mechanisms may be used for aggregating acknowledgement (ACK), block ACK (BA) and/or short packets transmissions for multi-user (MU) wireless communication systems. Aggregation mechanisms may be used for uplink (UL) and/or downlink (DL) orthogonal frequency division multiple access (OFDMA), and/or UL/DL multiple-user multiple input multiple output (MU-MIMO) transmissions, for example. Multi-user short packets may be aggregated and/or simultaneously transmitted for DL, UL, or peer-to-peer (P2P) transmissions.