公开(公告)号：US11765012B2

公开(公告)日：2023-09-19

申请号：US17226944

申请日：2021-04-09

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Alphan Sahin ,  Rui Yang ,  Erdem Bala

IPC: H04L27/26 ,  H04L1/00 ,  H04B17/309 ,  H04W4/70 ,  H04L5/00

CPC classification number: H04L27/2636 ,  H04L1/0069 ,  H04L1/0071 ,  H04L5/0051 ,  H04W4/70 ,  H04L5/0007

Abstract: A method for transmitting a discrete fourier transform (DFT) DFT-S-OFDM signal including frequency domain reference symbols is disclosed. The method comprises: determining to null a plurality of data symbols prior to DFT-spreading; performing DFT-spreading including the determined null data symbols; puncturing an interleaved output of the DFT-spreading; inserting reference symbols in a frequency domain of the punctured and interleaved DFT-S-OFDM signal; and transmitting the DFT-S-OFDM signal with inserted reference symbols to a receiver. The transmitted DFT-S-OFDM signal enables the receiver to apply zeros corresponding to the reference symbols to an interleaved input of DFT-despreading, and cancel interference due to the puncturing by using all outputs of the DFT-despreading.

公开(公告)号：US11758584B2

公开(公告)日：2023-09-12

申请号：US17222546

申请日：2021-04-05

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W74/08 ,  H04W72/541 ,  H04W74/00 ,  H04W84/12

CPC classification number: H04W74/0816 ,  H04W72/541 ,  H04W74/006 ,  H04W84/12

Abstract: Methods and apparatus for protection of multi-user (MU) transmission are described herein. An apparatus includes a receiver, a transmitter and a processor. The receiver and the processor detect a trigger frame for an uplink (UL) multi-user (MU) transmission. The processor and the transmitter generate and send a frame in response to the trigger frame and transmit channel availability information for a plurality of channels in response to the trigger frame. The receiver and the processor detect data in a resource unit (RU) of a downlink (DL) MU physical layer (PHY) protocol data unit (PPDU) on one of the plurality of channels. The one of the plurality of channels is based on the transmitted channel availability information.

公开(公告)号：US11736259B2

公开(公告)日：2023-08-22

申请号：US16610222

申请日：2018-05-01

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Shahrokh Nayeb Nazar ,  Mahmoud Taherzadeh Boroujeni ,  Erdem Bala ,  Alphan Sahin ,  Oghenekome Oteri ,  Rui Yang ,  Frank La Sita ,  Ahmad Reza Hedayat

IPC: H04L5/00 ,  H04L1/1607 ,  H04W72/0453 ,  H04W72/21 ,  H04W72/23

CPC classification number: H04L5/0055 ,  H04L1/1671 ,  H04W72/0453 ,  H04W72/21 ,  H04W72/23

Abstract: A wireless transmit receive unit (WTRU) may be configured to transmit uplink control information such as Hybrid Automatic Retransmission Request (HARQ) Acknowledgement or Negative Acknowledgement (ACK/NACK) using a sequence. The HARQ ACK/NACK may comprise one bit or two bits of information, and the WTRU may use a cyclic shift of the sequence to transmit the HARQ ACK/NACK. The WTRU may use different cyclic shifts of the sequence to transmit different HARQ ACK/NACK values and the cyclic shifts may be separated from each other in a manner to facilitate the transmissions. The WTRU may be further configured to receive, from a physical downlink control channel (PDCCH), an indication of a resource block for transmitting the HARQ ACK/NACK.

公开(公告)号：US11736158B2

公开(公告)日：2023-08-22

申请号：US17953004

申请日：2022-09-26

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

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

CPC classification number: H04B7/0452 ,  H04B7/0619 ,  H04W84/12

Abstract: An AP/PCP may perform user selection/pairing/grouping based on a measurement of an analog transmission (e.g., signal to noise ratio (SNR) or signal to interference plus noise ratio (SINR)). The SNRs may be used, for example by the station, to determine best beams and/or beam pairs and/or worst beams and/or beam pairs. A station may feed back the best few beams and/or beam pairs for a Tx and Rx virtual antenna pair. A station may feed back the worst few beams for the Tx and Rx virtual antenna pair. The AP/PCP may receive the indication(s) and/or use the indication(s) to group the stations.

公开(公告)号：US20230254193A1

公开(公告)日：2023-08-10

申请号：US18135334

申请日：2023-04-17

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Erdem Bala ,  Moon-il Lee ,  Afshin Haghighat ,  Alphan Sahin ,  Rui Yang ,  Frank La Sita

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/044

CPC classification number: H04L27/2636 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04W72/044 ,  H04L5/0044

Abstract: Methods, apparatus, systems, architectures and interfaces for reference signal (RS) configuration, generation, and/or transmission in a transmitter/receiver. The method includes receiving information indicating any of at least first and second modes of operation for transmitting a discrete Fourier transform (DFT)-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) symbol including a reference signal (RS), and transmitting the DFT-s-OFDM symbol including: (1) the RS and data tones, on condition that the information indicates the first mode; or (2) the RS and null tones, on condition that the information indicates the second mode, wherein the DFT-s-OFDM symbol is divided into a number of segments, each including a chunk of RS tones, and wherein any of a size or a location of the chunk is determined according to any of the first or second modes.

公开(公告)号：US20230114857A1

公开(公告)日：2023-04-13

申请号：US17911310

申请日：2021-03-15

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04W28/06 ,  H04L5/00 ,  H04L27/26

Abstract: Procedures, methods, architectures, apparatuses, systems, devices, and computer program products directed physical layer signaling in a wireless local area network system are provided. Among the methods is a method that may include any of generating an extremely high throughput (EHT) physical (PHY) layer protocol data unit (PDU) (PPDU) based on a PPDU format defining a preamble comprising (i) a fixed duration universal signaling (U-SIG) field, (ii) an EHT signaling (EHT-SIG) field, and (iii) an EHT short training field (EHT-STF), wherein the U-SIG and EHT-SIG fields respectively comprise an extra signaling indicator and extra signaling to support a third feature; and transmitting the U-SIG and EHT-SIG fields on a first bandwidth segment, followed by the EHT-STF on any of the first bandwidth segment and a second bandwidth segment, followed by (iii) an EHT data field on any of the first and second bandwidth segments.

公开(公告)号：US20220216898A1

公开(公告)日：2022-07-07

申请号：US17699828

申请日：2022-03-21

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04B7/0417 ,  H04B7/0452

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.

公开(公告)号：US11363589B2

公开(公告)日：2022-06-14

申请号：US16492233

申请日：2018-03-12

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W72/04 ,  H04L5/00 ,  H04W16/28 ,  H04W84/12

Abstract: A method, apparatus, and system for beamforming training using a wireless transmit receive unit (WTRU). A WTRU may receive an indication of a number of space time slots (STSs) from an access point (AP) within a beacon frame during a beamforming training allocation. The WTRU may send a response signal to the AP in a specific STS based on a function of the number of STSs. The WTRU may receive an acknowledgement (ACK) from the AP confirming the response was received. Alternatively, the AP may send a signal indicating that a collision occurred and alter the number of STSs, and the WTRU may try again in the next beamforming training allocation.

公开(公告)号：US20210410078A1

公开(公告)日：2021-12-30

申请号：US17473363

申请日：2021-09-13

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W52/14 ,  H04W52/24 ,  H04W52/10 ,  H04W74/00

Abstract: 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：US20210399838A1

公开(公告)日：2021-12-23

申请号：US17292072

申请日：2019-11-08

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04L1/18

Abstract: Methods and apparatus for multi-hybrid automatic repeat request (HARQ) transmission are provided. An access point (AP) may transmit a multi-HARQ transmission to a plurality of stations (STAs). The AP may receive a H-ARQ feedback response from the plurality of STAs. The H-ARQ feedback may include a field to indicate that the H-ARQ feedback is a codeword (CW)/CW group (CWG) based acknowledgment. The H-ARQ feedback may include a packet identification (ID). The packet ID may be a HARQ transmission ID, a sequence number, a MPDU ID or a PPDU ID. The packet ID may be carried in a PLCP header. The H-ARQ feedback may be an aggregated CW/CWG acknowledgment. The H-ARQ feedback may be carried in a null data packet (NDP). A PLCP header of the NDP packet may include a wideband PLCP header and a narrow band PLCP header.