公开(公告)号：US20210120539A1

公开(公告)日：2021-04-22

申请号：US17136342

申请日：2020-12-29

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W72/04 ,  H04B7/0491 ,  H04B7/06 ,  H04L1/00 ,  H04B7/0417 ,  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：US10764014B2

公开(公告)日：2020-09-01

申请号：US15962831

申请日：2018-04-25

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04L5/00 ,  H04L1/16 ,  H04L1/18 ,  H04L1/00

Abstract: A method and apparatus for operation by an access point (AP) is provided. The method may comprise receiving a first frame from a first STA, the first frame including first data and receiving a second frame from a second STA, the second frame including second data. In response to the receiving, an acknowledgement (ACK) frame may be transmitted to the first STA and to the second STA. The ACK frame may be addressed to a broadcast address and include a field which indicates whether the ACK frame is a multiple traffic identifier (multi-TID) block ACK frame format or another ACK frame format.

公开(公告)号：US10542555B2

公开(公告)日：2020-01-21

申请号：US16298712

申请日：2019-03-11

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Xiaofei Wang ,  Hanqing Lou ,  Monisha Ghosh ,  Nirav B Shah ,  Guodong Zhang ,  Ronald Murias

IPC: H04W72/12 ,  H04W72/04 ,  H04W74/06 ,  H04W74/00 ,  H04L1/18 ,  H04W74/08 ,  H04L1/16 ,  H04L1/00 ,  H04W74/04 ,  H04B17/318 ,  H04W84/12

Abstract: Methods and apparatuses are related to multi-user parallel channel access (MU-PCA). For example, a wireless transmit/receive unit (WTRU) is provided that is one of a plurality of WTRUs operable to simultaneously communicate via a plurality of channels managed by an access point (AP). The WTRU includes a receiver configured to receive, from the AP, over at least one channel of the plurality of channels, a group poll (G-Poll) message that includes a resource allocation that indicates at least one allocated channel of the plurality of channels for the WTRU; and a transmitter configured to transmit an uplink request message, to the AP in response to the G-Poll message, over the at least one allocated channel of the plurality of channels, the uplink request message corresponding to uplink data the WTRU has for transmission to the AP.

公开(公告)号：US10440750B2

公开(公告)日：2019-10-08

申请号：US15948869

申请日：2018-04-09

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Hanqing Lou ,  Guodong Zhang ,  Xiaofei Wang ,  Juan Fang ,  Oghenekome Oteri ,  Pengfei Xia ,  Monisha Ghosh ,  Robert L. Olesen

IPC: H04W4/00 ,  H04W74/08 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L5/00 ,  H04W72/04 ,  H04W84/12

Abstract: A method and apparatus for supporting UL MU diversity are provided. The method may comprise transmitting a MU RTS frame to a plurality of STAs, the MU RTS frame comprising a plurality of MCS indicators, a plurality of data stream number indicators, an indication of a spatial technology, and a duration field. The MU RTS frame solicits clear to send (CTS) frame responses from a plurality of STAs and simultaneous UL OFDMA transmissions may be received in accordance with the MCS indicators, the data stream number indicators and the indicated spatial technology. An AP may transmit another frame comprising UL transmission information for transmission of data frames by the plurality of STAs. The AP may receive from the plurality of STAs, the data frames simultaneously and may additionally transmit acknowledgements of the received data frames to the plurality of STAs.

公开(公告)号：US20180367191A1

公开(公告)日：2018-12-20

申请号：US16113569

申请日：2018-08-27

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04B7/0417 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06

Abstract: A station may be used to implement non-linear coding based multiuser multiple-input multiple-output (MU-MIMO). The station may include a processor that may be configured to perform a number of actions. For example, the processor may receive a null packet from an access point (AP). Channel feedback may be generated using the null packet. The channel feedback may be sent to the AP. QR dependent information may be received from the AP. Data may be sent to the AP according to the QR dependent information.

公开(公告)号：US20180241531A1

公开(公告)日：2018-08-23

申请号：US15962831

申请日：2018-04-25

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04L5/00 ,  H04L1/18 ,  H04L1/16

Abstract: A method and apparatus for operation by an access point (AP) is provided. The method may comprise receiving a first frame from a first STA, the first frame including first data and receiving a second frame from a second STA, the second frame including second data. In response to the receiving, an acknowledgement (ACK) frame may be transmitted to the first STA and to the second STA. The ACK frame may be addressed to a broadcast address and include a field which indicates whether the ACK frame is a multiple traffic identifier (multi-TID) block ACK frame format or another ACK frame format.

公开(公告)号：US09979446B2

公开(公告)日：2018-05-22

申请号：US15599651

申请日：2017-05-19

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Pengfei Xia ,  Monisha Ghosh ,  Hanqing Lou ,  Robert L. Olesen ,  Oghenekome Oteri

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00

CPC classification number: H04B7/0421 ,  H04B7/0617 ,  H04B7/0628 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0641 ,  H04B7/066 ,  H04L1/007 ,  H04L1/0073

Abstract: Methods for WiFi beamforming, feedback, and sounding (WiBEAM) are described. Codebook based beamforming feedback signaling and sounding mechanisms for use in wireless communications are disclosed. The methods described herein improve the feedback efficiency by using Givens rotation based decompositions and quantizing the resulting angles of the Givens rotation based decompositions using a range from a subset of [0, 2π]. Feedback may also be divided into multiple components to improve feedback efficiency/accuracy. Time domain beamforming reports for taking advantage of channel reciprocity while still taking into account practical radio frequency (RF) channel impairments are also described. Beamforming feedback that prioritized the feedback bits in accordance with the significance of the bits is also disclosed. A preamble structure to enable the use of smoothing methods for improved channel estimation, codebook designs that may be used for codebook based beamforming feedback, and multi-resolution explicit feedback are disclosed as well.

公开(公告)号：US20170164387A1

公开(公告)日：2017-06-08

申请号：US15325887

申请日：2015-07-17

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04W72/12 ,  H04W52/18 ,  H04B7/0452

CPC classification number: H04W72/1252 ,  H04B7/0452 ,  H04W52/18 ,  H04W74/04

Abstract: Systems, methods, and instrumentalities are described to implement WLAN uplink multi-user multiple input multiple output (UL MU-MIMO) communication in an Institute of Electrical and Electronics Engineers (IEEE) 802.11 based system, using an IEEE 802.11 station (STA). The STA may receive a downlink poll frame from an IEEE 802.11 access point (AP) including one or more of a request for reporting of a transmit power, a request for a timestamp of a response frame, or a request for an estimated carrier frequency offset (CFO) value. The STA may send an uplink response frame. The uplink response frame may include one or more of transmit power parameters, timestamp parameters, or an estimated CFO value to an AP. The STA may receive a schedule frame, wherein the schedule frame may include indication to adjust one or more of a transmit power, a timing correction value, or a CFO correction value.

公开(公告)号：US20170086211A1

公开(公告)日：2017-03-23

申请号：US15126206

申请日：2015-03-13

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Onur Sahin ,  Arnab Roy ,  Monisha Ghosh ,  Yugeswar Deenoo ,  Ravikumar V. Pragada ,  Joseph S. Levy

IPC: H04W72/12 ,  H04W48/16 ,  H04W74/04

CPC classification number: H04W72/12 ,  H04W48/16 ,  H04W72/0426 ,  H04W74/04 ,  H04W84/10 ,  H04W84/18

Abstract: Methods and apparatus may perform dual-band or multi-band mesh operations. A dual-band mesh station (MSTA) capable of operating in an O-band and a D-band may seek to join a mesh network, and may receive O-band beacons from at least one MSTA in the mesh network, where the O-band beacons may include D-band mesh information. The joining MSTA may transmit D-band beacons in a time-period specified by the O-band beacon, and on a condition that a beacon response message is received, may further transmit D-band association information via O-band management frames to join mesh network on the D-band. The joining MSTA may perform contention-free scheduled access in the D-band while sharing D-band transmission information in the O-band to enable concurrent communication in the D-band by neighboring multi-band MSTAs.

公开(公告)号：US20160073429A1

公开(公告)日：2016-03-10

申请号：US14888274

申请日：2014-05-02

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W74/08 ,  H04W24/02 ,  H04W4/08

CPC classification number: H04W74/0816 ,  H04W4/08 ,  H04W24/02 ,  H04W64/00 ,  H04W84/12

Abstract: Systems, methods, and instrumentalities are described to implement an interference management method in a WLAN. An access point (AP) or an inter-BSS coordinator (IBC) may identify a station (STA) associated with a first basic service set (BSS) as an edge STA or a non-edge STA. The AP or the IBC may group the edge STA into an edge group and a non-edge STA into a non-edge group. The AP or the IBC may receive information associated with a second BSS. The AP or the IBC may coordinate access of the edge group and/or the non-edge group. The access may be coordinated to minimize interference of the edge STA. The access may be based at least on the received information associated with the second BSS. The AP or the IBC may adjust transmit power of a plurality of STAs identified as edge group STAs and non-edge group STAs.

Abstract translation: 描述了系统，方法和工具，以实现WLAN中的干扰管理方法。 接入点（AP）或BSS间协调器（IBC）可以将与第一基本服务集（BSS）相关联的站（STA）标识为边缘STA或非边缘STA。 AP或IBC可以将边缘STA组合成边缘组，将非边缘STA组合成非边缘组。 AP或IBC可以接收与第二BSS相关联的信息。 AP或IBC可以协调边缘组和/或非边缘组的访问。 可以协调访问以最小化边缘STA的干扰。 访问可以至少基于与第二BSS相关联的所接收的信息。 AP或IBC可以调整被识别为边缘组STA和非边缘组STA的多个STA的发射功率。