公开(公告)号：US20190090259A1

公开(公告)日：2019-03-21

申请号：US16083028

申请日：2017-03-09

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Oghenekome Oteri ,  Hanqing Lou ,  Fengjun Xi ,  Rui Yang

IPC: H04W72/12 ,  H04B7/0452 ,  H04W72/08 ,  H04W28/02

CPC classification number: H04W72/1268 ,  H04B7/0452 ,  H04W28/0242 ,  H04W72/042 ,  H04W72/082 ,  H04W84/12

Abstract: Method, apparatuses, and systems for multi-user (MU) transmission is provided, including scheduling, by an access point (AP), an uplink (UL) MU transmission for a group of wireless transmit/receive units (WTRUs) in which there is an indication that at least one resource unit (RU) of a plurality of RUs is silenced. The silencing may be based on coordinating with one or more overlapping APs or by analyzing conditions of channels associated with an AP.

公开(公告)号：US10218463B2

公开(公告)日：2019-02-26

申请号：US15555786

申请日：2016-03-07

Applicant: InterDigital Patent Holdings, Inc.

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

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

Abstract: A STA may perform packet detection to detect a packet and decode a legacy preamble of the detected packet including a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signal (L-SIG) field. The STA may decode a high efficiency signal A (HE-SIG-A) field to obtain a first partial association identifier (PAID) comprising group information. If the decoded group information matches group information stored in a memory of the STA, the STA may decode a high efficiency (HE) preamble and a high efficiency signal B (HE-SIG-B) field of the detected packet. The HE-SIG-B field may include a station identifier within the group. When the group information is combined with the station identifier, the STA may determine an accurate address.

公开(公告)号：US10063290B2

公开(公告)日：2018-08-28

申请号：US14777158

申请日：2014-03-13

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04B7/00 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0417 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0626

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

公开(公告)号：US20180234118A1

公开(公告)日：2018-08-16

申请号：US15516597

申请日：2015-10-02

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Fengjun Xi ,  Yuan Sheng Jin ,  Pengfei Xia ,  Oghenekome Oteri ,  Hanqing Lou ,  Nirav B. Shah ,  Robert L. Olesen

IPC: H04B1/02 ,  H04L1/00 ,  H04L1/20

CPC classification number: H04B1/02 ,  H03M13/2707 ,  H04L1/00 ,  H04L1/0006 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0071 ,  H04L1/1671 ,  H04L1/20 ,  H04L5/00 ,  H04W84/12

Abstract: Methods, systems, and apparatuses are disclosed for transmitting a plurality of bits to an access point (AP) and receiving constellation symbol from the AP. A constellation symbol may include a plurality of indications of bits. Each indication of the plurality of indications of bits may be associated with a respective wireless transmit/receive unit (WTRU) of a plurality of WTRUs. The plurality of indications of bits may include indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).

公开(公告)号：US20180167926A1

公开(公告)日：2018-06-14

申请号：US15891348

申请日：2018-02-07

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W72/04 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0491 ,  H04L1/00 ,  H04W16/28

CPC classification number: H04W72/046 ,  H04B7/0417 ,  H04B7/0491 ,  H04B7/0617 ,  H04B7/063 ,  H04L1/00 ,  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：US20180084566A1

公开(公告)日：2018-03-22

申请号：US15826818

申请日：2017-11-30

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04W72/12 ,  H04W72/04 ,  H04W74/00 ,  H04W74/08

CPC classification number: H04W72/121 ,  H04B17/318 ,  H04L1/0025 ,  H04L1/007 ,  H04L1/1664 ,  H04L1/1685 ,  H04L1/1861 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/0453 ,  H04W72/1278 ,  H04W74/004 ,  H04W74/006 ,  H04W74/04 ,  H04W74/06 ,  H04W74/0816 ,  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：US09860908B2

公开(公告)日：2018-01-02

申请号：US15581261

申请日：2017-04-28

Applicant: InterDigital Patent Holdings, Inc.

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

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

CPC classification number: H04W72/121 ,  H04B17/318 ,  H04L1/0025 ,  H04L1/007 ,  H04L1/1664 ,  H04L1/1685 ,  H04L1/1861 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/0453 ,  H04W72/1278 ,  H04W74/004 ,  H04W74/006 ,  H04W74/04 ,  H04W74/06 ,  H04W74/0816 ,  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 request-to-send (G-RTS) message that includes a resource allocation that indicates at least one assigned channel for the WTRU; a transmitter configured to transmit a clear-to-send (CTS) message, to the AP, over the at least one assigned channel of the plurality of channels; and the receiver further configured to receive a data message, from the AP, over at least one channel of the plurality of channels.

公开(公告)号：US09680538B2

公开(公告)日：2017-06-13

申请号：US14040249

申请日：2013-09-27

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 prioritizes 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：US09608789B2

公开(公告)日：2017-03-28

申请号：US13890833

申请日：2013-05-09

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

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

CPC classification number: H04L5/0055 ,  H04L1/1607 ,  H04L1/1671 ,  H04L1/1854 ,  H04L1/1864 ,  H04L2001/0093

Abstract: A method and apparatus for transmitting acknowledgements in response to data packets in wireless communication are disclosed. A recipient may receive a plurality of data packets from a plurality of stations and transmit acknowledgements for the data packets to the originating stations in a single transmission. The acknowledgements may be transmitted using multi-user multiple-input multiple-output (MU-MIMO). Alternatively, the acknowledgements may be aggregated and transmitted in the single transmission. A short acknowledgement (ACK) frame may be sent in response to a received frame. The short ACK frame may include an ACK sequence corresponding to a sequence identity (ID) included in the received frame. The short ACK frame may include a short training field (STF) and the ACK sequence. The short ACK frame may be transmitted with a short ACK indication. The short ACK frame may be sent in response to an indication included in the received frame.

公开(公告)号：US20160044711A1

公开(公告)日：2016-02-11

申请号：US14777151

申请日：2014-03-13

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Hanqing Lou ,  Monisha Ghosh ,  Xiaofei Wang ,  Robert L. Olesen

IPC: H04W74/08 ,  H04W72/12 ,  H04B7/06

CPC classification number: H04W74/0816 ,  H04B7/0617 ,  H04W72/1284 ,  H04W84/12 ,  H04W88/06 ,  H04W88/08

Abstract: Systems, methods, and instrumentalities are provided to implement transmission scheduling. A multiband device may send a request via a first frequency band. The request may include a multiband Request to Send (MRTS) transmission. The request may be associated with a second frequency band and/or a beamforming training schedule. The first frequency band may be associated with a quasi-omni transmission and the second frequency band may be associated with a directional transmission. The first frequency band may be a 5 GHz band and the second frequency band may be a 60 GHz band. The multiband device may receive a multiband Clear to Send (MCTS) transmission via the first frequency band confirming the request. The multiband device may be configured to send a beamforming signal in accordance with the request, for example, via the second frequency band. The beamforming signal may be sent in accordance with a beamforming training schedule.

Abstract translation: 提供系统，方法和手段来实现传输调度。 多频带设备可以经由第一频带发送请求。 该请求可以包括多频带请求发送（MRTS）传输。 该请求可以与第二频带和/或波束成形训练计划相关联。 第一频带可以与准全向传输相关联，并且第二频带可以与定向传输相关联。 第一频带可以是5GHz频带，第二频带可以是60GHz频带。 多频带设备可经由确认该请求的第一频带接收多频段清除发送（MCTS）传输。 多频带设备可以被配置为例如经由第二频带根据请求发送波束成形信号。 波束成形信号可以根据波束成形训练计划发送。