公开(公告)号：US20180041917A1

公开(公告)日：2018-02-08

申请号：US15555686

申请日：2016-03-07

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04W28/06 ,  H04L5/00 ,  H04W28/04 ,  H04W72/12

CPC classification number: H04W28/06 ,  H04B7/0452 ,  H04L1/1614 ,  H04L1/1621 ,  H04L1/1861 ,  H04L5/0007 ,  H04L5/0055 ,  H04L2001/0093 ,  H04W28/04 ,  H04W72/121 ,  H04W84/12

Abstract: Mechanisms may be used for aggregating acknowledgement (ACK), block ACK (BA) and/or short packets transmissions for multi-user (MU) wireless communication systems. Aggregation mechanisms may be used for uplink (UL) and/or downlink (DL) orthogonal frequency division multiple access (OFDMA), and/or UL/DL multiple-user multiple input multiple output (MU-MIMO) transmissions, for example. Multi-user short packets may be aggregated and/or simultaneously transmitted for DL, UL, or peer-to-peer (P2P) transmissions.

公开(公告)号：US20170294949A1

公开(公告)日：2017-10-12

申请号：US15510127

申请日：2015-09-11

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Guodong Zhang ,  Hanqing Lou ,  Xiaofei Wang

IPC: H04B7/06 ,  H04J11/00 ,  H04W52/46 ,  H04W74/08

CPC classification number: H04B7/0617 ,  H04J11/0023 ,  H04W52/46 ,  H04W74/0808 ,  H04W74/0816

Abstract: To facilitate spatial sharing, signaling may be used. A first node may receive one or more frame exchanges between a second node and a third node, wherein the second node is associate with the third node. The first node may then detect a spatial sharing scenario (SSS) with an overlapping basic service set (BSS) based on the received one or more frame exchanges. Also, the first node may transmit a directional poll request to at least a fourth node associated with the first node based on the detected SSS, and thereby null directional transmissions associated with the second node, the third node or both. The first node may then receive a direction poll response from the fourth node. Further, the first node may transmit one or more directional, beamformed transmissions to the fourth node simultaneously with directional, beamformed transmissions by the second node to the third node.

公开(公告)号：US09681462B2

公开(公告)日：2017-06-13

申请号：US15097048

申请日：2016-04-12

Applicant: InterDigital Patent Holdings, Inc.

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

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

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: Method and apparatuses may provide multi-user parallel channel access (MU-PCA). For example, a wireless transmit/receive unit (WTRU) is provided that belongs to a MU-PCA group of a plurality of WTRUs that are configured to simultaneously communicate via a plurality of channels managed by an access point (AP). The WTRU may include a receiver configured to receive a data message, from the AP, over a channel associated with the WTRU of the plurality of channels, wherein the data message is one of a group of multiple data messages transmitted simultaneously by the AP over the plurality of channels; and a transmitter configured to transmit a message to the AP over the channel associated with the WTRU, wherein the message includes an indication bit for notifying the AP whether the WTRU has uplink (UL) data to transmit to the AP.

公开(公告)号：US20160043783A1

公开(公告)日：2016-02-11

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: H04B7/04

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.

Abstract translation: 一个站用于实现基于非线性编码的多用户多输入多输出（MU-MIMO）。 该站包括可被配置为执行多个动作的处理器。 例如，处理器从接入点（AP）接收空分组。 使用空数据包生成信道反馈。 信道反馈被发送到AP。 从AP接收QR相关信息。 数据根据QR依赖信息发送给AP。

公开(公告)号：US20150295629A1

公开(公告)日：2015-10-15

申请号：US14438021

申请日：2013-10-25

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04B7/04 ,  H04B7/08 ,  H04B7/06

CPC classification number: H04B7/0491 ,  H04B7/061 ,  H04B7/0619 ,  H04B7/0695 ,  H04B7/088 ,  H04W88/08

Abstract: A method and apparatus are disclosed for training and feedback in sectorized transmissions. An IEEE 802.11 station may receive a Sector Training Announcement frame from an AP. The station may then receive a plurality of Training frames from the AP, wherein each of the plurality of Training frames is separated by a short interframe space (SIFS) and each of the plurality of Training frames is received using a different sectorized antenna pattern. The station may generate a Sector Feedback frame indicating a sector based on the plurality of Training frames. The station may send the Sector Feedback frame to the AP. The Sector Feedback frame may indicate a desire to enroll in sectorized transmissions. Alternatively, the Sector Feedback frame may indicate a desire to change sectors.

Abstract translation: 公开了用于在扇区化传输中的训练和反馈的方法和装置。 IEEE 802.11站可以从AP接收扇区训练通告帧。 然后，站可以从AP接收多个训练帧，其中多个训练帧中的每一个由短帧间间隔（SIFS）分隔，并且使用不同的扇区天线方向接收多个训练帧中的每一个。 站可以基于多个训练帧生成指示扇区的扇区反馈帧。 站可以将扇区反馈帧发送到AP。 扇区反馈帧可以指示登记扇区化传输的愿望。 或者，扇区反馈帧可以指示改变扇区的愿望。

公开(公告)号：US20140093005A1

公开(公告)日：2014-04-03

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

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.

Abstract translation: 描述了用于WiFi波束成形，反馈和探测（WiBEAM）的方法。 公开了用于无线通信的基于码本的波束成形反馈信令和探测机制。 本文描述的方法通过使用基于Givens旋转分解并使用来自[0,2＆pgr]的子集的范围来量化基于Givens旋转的分解的所得角度来提高反馈效率。 反馈也可以分为多个组件，以提高反馈效率/精度。 还描述了利用信道互惠的同时考虑到实际射频（RF）信道损伤的时域波束成形报告。 还公开了根据比特的重要性对反馈比特进行优先级的波束成形反馈。 还公开了能够使用用于改进的信道估计的平滑方法，可用于基于码本的波束成形反馈的码本设计以及多分辨率显式反馈的前导码结构。