公开(公告)号：US20220173780A1

公开(公告)日：2022-06-02

申请号：US17516253

申请日：2021-11-01

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04B7/06

Abstract: 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：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.

公开(公告)号：US20220166470A1

公开(公告)日：2022-05-26

申请号：US17667144

申请日：2022-02-08

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

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

Abstract: Methods and apparatuses for multiple input-multiple output (MIMO) channel access are provided herein. A method performed by a station may include receiving, from an access point (AP), a frame including information indicating a broadcast address. The frame may further include a control trailer including information indicating that a multi-user multiple input-multiple output (MU-MIMO) frame is to be transmitted by the AP and information indicative of a designation of a plurality of STAs, the plurality of STAs including the STA. The frame may solicit response frames from at least the designated plurality of STAs. The method may further include transmitting a response frame to the indicated broadcast address and receiving the MU-MIMO frame from the AP.

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.

公开(公告)号：US11012124B2

公开(公告)日：2021-05-18

申请号：US16319077

申请日：2017-07-21

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

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：US20210028831A1

公开(公告)日：2021-01-28

申请号：US16319077

申请日：2017-07-21

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04B7/0452 ,  H04B7/06

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：US20200162302A1

公开(公告)日：2020-05-21

申请号：US16611187

申请日：2018-05-04

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04L27/26 ,  H04L5/00

Abstract: A wireless transmit/receive unit (WTRU) or access point (AP) may generate a protocol data unit (PDU) of a first 802.11 protocol and a preamble and data of a second 802.11 protocol. The preamble and data of the second 802.11 protocol may be arranged on resources of the PDU of the first 802.11 protocol with shaping sequences for concurrent transmission.

公开(公告)号：US20190288763A1

公开(公告)日：2019-09-19

申请号：US16346619

申请日：2017-11-02

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04B7/06

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

公开(公告)号：US12237961B2

公开(公告)日：2025-02-25

申请号：US18228469

申请日：2023-07-31

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Alphan Sahin ,  Rui Yang ,  Erdem Bala

IPC: H04L27/26 ,  H04L1/00 ,  H04L5/00 ,  H04W4/70 ,  H04W72/04

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：US12207278B2

公开(公告)日：2025-01-21

申请号：US18383579

申请日：2023-10-25

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Afshin Haghighat ,  Oghenekome Oteri ,  Alphan Sahin ,  Shahrokh Nayeb Nazar ,  Moon-il Lee ,  Prasanna Herath Mudiyanselage

IPC: H04W72/23 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02

Abstract: Methods, apparatuses, systems, devices, and computer program products directed to phase-continuous frequency selective precoding are provided. Included among these classes are methods for use in connection with dynamic precoding resource block group (PRG) configuration and with codebook based transmission configuration. A representative of such methods may include any of receiving signaling indicating transmit precoding information; determining a candidate PRG size using any of the transmit precoding information, a rule for determining a PRG size and configured PRG sizes; and configuring or reconfiguring a wireless transmit/receive device in accordance with the candidate PRG size. Another of the representative methods may include reporting a transmission coherence capability of a wireless transmit/receive unit; receiving a codebook subset restriction (CBSR) commensurate with the transmission coherence capability; determining a transmit precoding matrix indices (TPMI) size based on the CBSR; receiving a TPMI; and detecting or decoding the TPMI based on the determined TPMI size.