公开(公告)号：US11528723B2

公开(公告)日：2022-12-13

申请号：US16747254

申请日：2020-01-20

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04W72/12 ,  H04W72/04 ,  H04W74/00 ,  H04W74/06 ,  H04W74/04 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04W74/08 ,  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 the 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：US11522667B2

公开(公告)日：2022-12-06

申请号：US17052315

申请日：2019-05-02

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W72/12 ,  H04W84/12 ,  H04L5/14 ,  H04W74/08

Abstract: Methods and apparatuses are described herein for multiple access schemes for Wireless Local Area Network (WLAN) with full-duplex radios. For example, an access point (AP), in response to receiving a request to send (RTS) from a first station (STA), may transmit a full-duplex clear to send (FD CTS) to the first STA and a full-duplex request to send (FD RTS) to a second STA. In response to transmitting the FD RTS to the second STA, the AP may receive a clear to send (CTS) from the second STA. The AP may transmit, to both the first STA and the second STA, a FD trigger frame that includes scheduling information to enables FD communication with the first STA for uplink (UL) data and the second STA for downlink (DL) data at a same time. The scheduling information may include timing information and channel information for the FD communication.

公开(公告)号：US20220255612A1

公开(公告)日：2022-08-11

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 ,  H04W72/04

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：US20220248457A1

公开(公告)日：2022-08-04

申请号：US17728148

申请日：2022-04-25

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Hanqing Lou ,  Guodong Zhang ,  Robert L. Olesen ,  Xiaofei Wang

IPC: H04W74/00 ,  H04W80/00 ,  H04B7/0452

Abstract: Methods, devices and systems are provided for performing for multi-user (MU) transmission. A wireless transmit/receive unit (WTRU) may be configured to receive a frame, decode the received frame and determine whether the received frame is a null data packet (NDP) multi-user (MU) media access control (MAC) physical layer convergence protocol (PLCP) protocol data unit (PPDU) (NDP MU MAC PPDU) based on meeting an NDP condition. The NDP MU MAC PPDU may correspond to an MU transmission and may include a PLCP header which includes an NDP signal (SIG) field having MU control information. Based on the received frame meeting the NDP condition, the WTRU may be further configured to process the NDP SIG field, generate a response based on the NDP SIG field and the MU control information, and transmit the response.

公开(公告)号：US20220225323A1

公开(公告)日：2022-07-14

申请号：US17610342

申请日：2020-05-01

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W72/04 ,  H04W72/10 ,  H04W72/08 ,  H04W74/00 ,  H04W74/06

Abstract: Techniques, devices and systems are disclosed for generating a resource request poll comprising at least one response criteria, transmitting the resource request poll, receiving a resource request report from STAs that meet at least one response criteria. A trigger frame may be transmitted to the at least one STA based on the resource request report from the at least one STA. The response criteria may include at least one of a NFRP, a UL access type, a delay bound, an NDP feedback report AC, a number of indicated AID bits, an AID range, an information requested, a number of bits to be included in NDP feedback report or preamble, number of LTFs to be included in the NDP feedback report or preamble, and a number of bits to be included in NDP feedback report or preamble per LTF or per N LTF symbol.

公开(公告)号：US11252587B2

公开(公告)日：2022-02-15

申请号：US16492823

申请日：2018-03-09

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W24/08 ,  H04B17/309 ,  H04W48/12 ,  H04B7/06

Abstract: Devices, methods, and systems for scheduling of an enhanced sector level sweep (SLS). A wireless transmit/receive unit (WTRU) monitors beacon frames transmitted from one or more access points associated with the WTRU. The WTRU receive the beacon frames over multiple transmission sectors during a time interval. The WTRU then compiles the transmission sectors information in a list and ranks the sectors in the list, based on the sectors' characteristics. Then, the WTRU transmits the list over one sector of the list to the one or more access points.

公开(公告)号：US20210367739A1

公开(公告)日：2021-11-25

申请号：US17392933

申请日：2021-08-03

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04L5/00 ,  H04L1/16 ,  H04L1/18

Abstract: A method performed by a STA may comprise transmitting a first negotiation message to an AP and receiving a second negotiation message from the AP. The first negotiation message and the second negotiation message may negotiate a block acknowledgement agreement. The method may further comprise receiving a data unit, from the AP, the data unit having a duration field indicating a duration of a block-ACK frame. The duration of the block-ACK frame may be determined based on the negotiated block ACK agreement. A block-ACK frame may be transmitted within the duration indicated by the duration field.

公开(公告)号：US11165476B2

公开(公告)日：2021-11-02

申请号：US16319083

申请日：2017-07-21

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：US20210306183A1

公开(公告)日：2021-09-30

申请号：US17346616

申请日：2021-06-14

Applicant: InterDigital Patent Holdings, Inc.

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

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

Abstract: 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

Applicant: InterDigital Patent Holdings, Inc.

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

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

Abstract: 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.