公开(公告)号：US20210360531A1

公开(公告)日：2021-11-18

申请号：US17385631

申请日：2021-07-26

申请人： InterDigital Patent Holdings, Inc.

发明人： Xiaofei Wang ,  Li-Hsiang Sun ,  Oghenekome Oteri

IPC分类号： H04W52/02

摘要： Exemplary embodiments disclosed herein provide procedures for power efficient and rapid access point (AP) discovery using wake up radios. Additional embodiments provide procedures for securely waking up stations (STAs) using wake up radios (WURs). Methods are further described herein for coverage range detection and STA roaming for wake up radios. Further embodiments relate to procedures for coexistence for wake up radios and primary connectivity radios.

公开(公告)号：US11165476B2

公开(公告)日：2021-11-02

申请号：US16319083

申请日：2017-07-21

申请人： INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC分类号： H04B7/06

摘要： Systems, methods, and instrumentalities are disclosed for adaptation of multiple input multiple output (MIMO) mode in mmW Wireless Local Area Network (WLAN) systems. A first station (STA) may receive a mode change request from a second STA. The mode change request may indicate a mode change for a MIMO mode, a polarization mode, and/or an orthogonal frequency-division multiple access (OFDMA) mode. The mode change request may include one or more STA fields. The one or more STA fields may include a STA field associated with the first STA. Each of the one or more STA fields may include a MIMO mode subfield, a polarization mode subfield, and/or an OFDMA mode subfield. The first STA may change the MIMO mode, the polarization mode, and/or the OFDMA mode, for example, based on the mode change request. The first STA may send a mode change response to the second STA.

公开(公告)号：US20210306183A1

公开(公告)日：2021-09-30

申请号：US17346616

申请日：2021-06-14

申请人： InterDigital Patent Holdings, Inc.

发明人： Alphan Sahin ,  Rui Yang ,  Hanqing Lou ,  Oghenekome Oteri ,  Robert Olesen ,  Fengjun Xi

IPC分类号： H04L25/02 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0452 ,  H04L27/26 ,  H04B7/0413

摘要： Methods, apparatuses, and systems to enable a channel estimation of more than one channel for Multi-Input Multi-Output (MIMO) communications in a wireless network is provided. The method includes determining a first set of complex numbers comprising first channel estimation signal associated with a first channel, determining a second set of complex numbers comprising second channel estimation signal associated with a second channel, and transmitting the first set of complex numbers and the second set of complex numbers via a physical layer (PHY) frame, wherein the second set of complex numbers are complex conjugates of the first set of complex numbers.

公开(公告)号：US20210289448A1

公开(公告)日：2021-09-16

申请号：US17335734

申请日：2021-06-01

申请人： InterDigital Patent Holdings, Inc.

发明人： Oghenekome Oteri ,  Pengfei Xia ,  Xiaofei Wang ,  Hanqing Lou ,  Monisha Ghosh ,  Robert L. Olesen ,  Nirav B. Shah ,  Frank La Sita

IPC分类号： H04W52/24 ,  H04W74/08 ,  H04W52/12

摘要： Methods and apparatuses are described herein for adapting clear channel assessment (CCA) thresholds with or without Transmit Power Control (TPC) are disclosed. An IEEE 802.11 station (STA) may dynamically calculate a STA specific transmit power control (TPC) value and a STA specific clear channel assessment (CCA) value based on a target TPC parameter and a target CCA parameter. The target TPC parameter and the target CCA parameter may be received from an IEEE 802.11 cluster head configured to control TPC and CCA for a plurality of STAs associated with the BSS. The target TPC parameter and the target CCA parameter also may be related. The STA may then determine whether a carrier sense multiple access (CSMA) wireless medium of a wireless local area network (WLAN) basic service set (BSS) is occupied or idle based on the STA specific CCA value.

公开(公告)号：US11122517B2

公开(公告)日：2021-09-14

申请号：US16700737

申请日：2019-12-02

申请人： InterDigital Patent Holdings, Inc.

发明人： Hanqing Lou ,  Oghenekome Oteri ,  Guodong Zhang ,  Robert L. Olesen ,  Rui Yang

IPC分类号： H04B7/0452 ,  H04W52/14 ,  H04W52/24 ,  H04W52/10 ,  H04W74/00 ,  H04W84/12 ,  H04W52/22 ,  H04B17/318 ,  H04W88/02

摘要： Methods and systems for operation in a WLAN are provided. Methods and systems for a transmit power control (TPC) scheme are disclosed. In an embodiment, an access point (AP) may send a trigger frame to one or more stations (STAs) for synchronizing and scheduling uplink (UL) multi-user (MU) transmissions. The trigger frame may contain an open-loop power control index 1 and a power adjustment index 2. The one or more STAs may estimate pathloss using an indicated AP transmit power and received power to set a baseline transmit power. The one or more STAs may adjust their transmit power in the UL transmission period to be the indicated target receive power at the AP.

公开(公告)号：US11121813B2

公开(公告)日：2021-09-14

申请号：US16284891

申请日：2019-02-25

申请人： InterDigital Patent Holdings, Inc.

发明人： Hanqing Lou ,  Oghenekome Oteri ,  Rui Yang ,  Robert L. Olesen ,  Guodong Zhang

IPC分类号： H04W84/12 ,  H04L1/00 ,  H04L1/18 ,  H04L29/12

摘要： A method performed by an AP may comprise transmitting a MU-HE-PPDU, on a first 20 MHz channel and a second 20 MHz channel, to a plurality of STAs. The MU-HE-PPDU may comprise an HE-SIG-A portion carried on the first 20 MHz channel and the second 20 MHz channel. The MU-HE-PPDU may comprise a first HE-SIG-B portion carried on the first 20 MHz channel and a second HE-SIG-B portion carried on the second 20 MHz channel.

公开(公告)号：US20210243806A1

公开(公告)日：2021-08-05

申请号：US17052642

申请日：2019-05-03

申请人： INTERDIGITAL PATENT HOLDINGS, INC.

发明人： Oghenekome Oteri ,  Guodong Zhang ,  Li-Hsiang Sun ,  Robert L. Olesen

IPC分类号： H04W74/08 ,  H04W24/10 ,  H04L5/14

摘要： Methods and apparatuses are described herein for full-duplex transmission opportunity discovery and transmission in a wireless 802.11 network A full duplex compatible access point may transmit a full duplex (FD) transmission opportunity (TxOP) setup frame to a plurality of wireless transmit/receive units (WTRUs). This enables each of the plurality of WTRUs to transmit a measurement frame for interference measurement by the each of the other WTRUs to determine which WTRUs may participate in FD communication. Feedback is received by the AP and the AP determines which of the plurality of WTRUs the AP can perform FD communication with based on the feedback. FD communication with the determined WTRUs is then commenced

公开(公告)号：US20210243628A1

公开(公告)日：2021-08-05

申请号：US17235599

申请日：2021-04-20

申请人： InterDigital Patent Holdings, Inc.

发明人： Oghenekome Oteri ,  Hanqing Lou ,  Nirav B. Shah ,  Xiaofei Wang ,  Rui Yang ,  Guodong Zhang ,  Frank La Sita ,  Robert L. Olesen

IPC分类号： H04W24/08 ,  H04W74/08 ,  H04W74/00 ,  H04W52/34

摘要： Device, systems, and/or techniques for using sub-channel signaling information between an access point and a first station are disclosed. An uplink trigger sent from the access point to the first station may be received. A map may be transmitted from the first station indicating at least one sub-channel that is available for spatial sharing by a second station. The first station may receive an acknowledgement from the access point that data was transmitted from the second station on the at least one sub-channel and/or received by the at least one access point. An OFDMA transmission having a sub-channel/sub-band available for transmitting data may be determined. An energy in the sub-channel/sub-band may be measured and/or compared to a dynamic and/or static threshold. Whether a sub-channel/sub-band is free or busy may be determined for example based on if the measured energy is, or is not, greater than the threshold.

公开(公告)号：US11019650B2

公开(公告)日：2021-05-25

申请号：US16069908

申请日：2017-01-13

申请人： INTERDIGITAL PATENT HOLDINGS, INC.

发明人： Oghenekome Oteri ,  Hanqing Lou ,  Frank La Sita ,  Fengjun Xi

IPC分类号： H04W4/00 ,  H04W72/12 ,  H04W52/36 ,  H04B17/318 ,  H04L1/00 ,  H04W52/24 ,  H04W84/12

摘要： Systems, methods, and instrumentalities are disclosed for range extension, basic service set (BSS) color labeling, and multi-user (MU) fragmentation and control in WLANs. A range extension notification/enablement scheme, a clear channel assessment (CCA), a headroom indication, and/or power scaling may be provided for a range extension mode. BSS color may be provided for multiple-BSSs under an access point (AP). Uplink (UL) transmission may be provided with different fragmentation capabilities. A high-efficiency (HE) trigger-based UL NDP physical layer convergence protocol (PLCP) protocol data unit (PPDU) frame may be provided. A station (STA) may receive a trigger frame comprising a null data packet (NDP) indication and a trigger type. The STA may determine that the STA is an intended recipient of the trigger frame. The STA may prepare an NDP PPDU for a control frame and/or a management frame based on the trigger type.

公开(公告)号：US20210143887A1

公开(公告)日：2021-05-13

申请号：US16621133

申请日：2018-06-14

申请人： INTERDIGITAL PATENT HOLDINGS, INC.

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

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

摘要： 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.