公开(公告)号：US09793975B2

公开(公告)日：2017-10-17

申请号：US14760103

申请日：2014-01-10

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Guodong Zhang ,  Xiaofei Wang ,  Hanqing Lou ,  Sudheer A. Grandhi

IPC: H04J1/10 ,  H04B7/155 ,  H04W40/24 ,  H04W52/02 ,  H04W84/12

CPC classification number: H04B7/15507 ,  H04W40/244 ,  H04W52/0216 ,  H04W52/0229 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/1226 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/23

Abstract: A method for associating a new end-station (end-STA) with a relay access point (R-AP) in a relay transmission. An assignment of a new identifier is transmitted to the new end-STA, wherein traffic indication map indications for the new end-STA in a beacon from the R-AP follows the transmission of the new identifier assignment. A message is sent to a root access point (AP), the message including an indication of a number of information fields in the message and at least one information field, each of the at least one information fields including an identifier of one end-STA associated with the R-AP. An acknowledgement is received from the root AP on a condition that the root AP correctly receives the message and associates an identifier of the end-STA with an identifier of the R-AP.

公开(公告)号：US20170288748A1

公开(公告)日：2017-10-05

申请号：US15510383

申请日：2015-09-11

Applicant: InterDigital Patent Holdings, Inc.

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

IPC: H04B7/0452 ,  H04L5/00 ,  H04B7/06

CPC classification number: H04B7/0452 ,  H04B7/0617 ,  H04L5/0048 ,  H04L5/0094 ,  H04W84/12

Abstract: Systems, methods, and instrumentalities are provided to determine a physical layer (PHY) protocol data unit (PPDU) format. A determination may be made if a basic service set (BSS) includes a first-type legacy station, wherein the first-type legacy station is a pre-802.1 In device. A determination may be made if stations in the BSS support a short format preamble. A determination may be made if beamforming or precoding is to be used in association with an upcoming multi-user transmission. An indication of a selected PPDU preamble format may be sent to a station in the BSS via a multi-user transmission, wherein a long format preamble is selected when the BSS includes the first-type legacy station, beamforming is to be used in association with the upcoming multi-user transmission, or precoding is to be used in association with the upcoming multi-user transmission, and the short format preamble is selected when the BSS does not include the first-type legacy station, beamforming is to not be used in association with the upcoming multi-user transmission, and precoding is not to be used in association with the upcoming multi-user transmission.

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：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。

公开(公告)号：US20150289147A1

公开(公告)日：2015-10-08

申请号：US14441237

申请日：2013-11-08

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W16/28 ,  H04B7/04 ,  H04B7/06 ,  H04W72/04

CPC classification number: H04W16/28 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0634 ,  H04W72/0453 ,  H04W88/08

Abstract: A method, apparatus, system, and computer readable medium may be used to perform beamforming. The method may include a first communication device sending a first plurality of beamforming training frames to a second communication device using a first beamforming weight vector; the first communication device receiving from the second communication device a second beamforming weight vector; and the first communication device sending a second plurality of beamforming training frames to the second communication device using the second beamforming weight vector. The apparatus, method, system, and computer readable media may use spatial diversity with beam switching, spatial diversity with a single beam, weighted multipath beamforming training, single user spatial multiplexing, and beamforming training for beam division multiple access (BDMA).

Abstract translation: 可以使用方法，装置，系统和计算机可读介质来执行波束成形。 该方法可以包括使用第一波束形成权重向量向第二通信设备发送第一多个波束形成训练帧的第一通信设备; 所述第一通信设备从所述第二通信设备接收第二波束成形权重向量; 以及所述第一通信设备使用所述第二波束成形加权向量向所述第二通信设备发送第二多个波束形成训练帧。 装置，方法，系统和计算机可读介质可以使用具有波束切换的空间分集，具有单波束的空间分集，加权多径波束形成训练，单用户空间复用和用于波束分多址（BDMA）的波束成形训练。

公开(公告)号：US20130301551A1

公开(公告)日：2013-11-14

申请号：US13838915

申请日：2013-03-15

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Monisha Ghosh ,  Xiaofei Wang ,  Hanqing Lou ,  Nirav B. Shah ,  Guodong Zhang ,  Frank La Sita

IPC: H04W72/04

CPC classification number: H04B7/0851 ,  H04B7/0404 ,  H04B7/0452 ,  H04B7/0628 ,  H04B7/0643 ,  H04B7/066 ,  H04B17/12 ,  H04L27/266 ,  H04W52/146 ,  H04W52/365 ,  H04W56/004 ,  H04W72/042 ,  H04W84/12 ,  H04W88/08

Abstract: WTRUs, access points (APs) and methods thereon are disclosed. A method on a WTRU may include receiving a message from an AP that comprises a beamformee capability element; sending a second message to the AP that comprises a beamformer capability element; and receiving, from the AP, a third message in response to the second message that indicates a group to which the WTRU is assigned. The group may be based on the beamformer capability element and the group may indicate UL transmission information to be used by the WTRU. A method on an AP may include determining a group for multiple WTRUs based on a received beamformer capability element. A method on a WTRU may include sending to an AP a message with a low overhead preamble for UL MU-MIMO. The low overhead preamble may include LTFs that enable the AP to distinguish the WTRU from other WTRUs.

Abstract translation: WTRU，接入点（AP）及其上的方法被公开。 WTRU上的方法可以包括从AP接收包括波束形成器能力元素的消息; 向AP发送包括波束形成器能力元素的第二消息; 以及响应于指示所述WTRU被分配到的组的所述第二消息，从所述AP接收第三消息。 该组可以基于波束形成器能力元素，并且该组可以指示要由WTRU使用的UL传输信息。 AP上的方法可以包括基于接收到的波束形成器能力元素来确定用于多个WTRU的组。 WTRU上的方法可以包括向AP发送具有用于UL MU-MIMO的低开销前导码的消息。 低开销前导码可以包括使得AP能够区分WTRU与其他WTRU的LTF。

公开(公告)号：US20130230035A1

公开(公告)日：2013-09-05

申请号：US13782709

申请日：2013-03-01

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W48/20

CPC classification number: H04W48/20 ,  H04B7/0456 ,  H04B7/0617 ,  H04W48/12 ,  H04W48/16

Abstract: A method for beacon information provisioning, transmissions and protocol enhancements includes defining multiple level beacons based on the attributes of beacon information fields/elements. A short beacon may be used in addition to a primary beacon in space-time block code (STBC) modes, non-STBC modes and in multiple bandwidth modes. The short beacons may also be used for Fast Initial Link Setup (FILS) and to extend system coverage range. Beacon transmissions may use adaptive modulation and coding set/scheme (MCS).

Abstract translation: 用于信标信息提供，传输和协议增强的方法包括基于信标信息字段/元素的属性定义多级信标。 除了空时块（STBC）模式，非STBC模式和多个带宽模式中的主信标之外，还可以使用短信标。 短信标也可用于快速初始链路设置（FILS），并扩展系统覆盖范围。 信标传输可以使用自适应调制和编码集/方案（MCS）。

公开(公告)号：US12237885B2

公开(公告)日：2025-02-25

申请号：US18236238

申请日：2023-08-21

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：US12225494B2

公开(公告)日：2025-02-11

申请号：US18211509

申请日：2023-06-19

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

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

IPC: H04W4/00 ,  H04W8/00 ,  H04W60/04 ,  H04W84/12

Abstract: Methods and apparatuses are described herein for multiple AP coordination in wireless local area networks (WLANs). For example, a station (STA) may receive, from a first access points (APs), a probe response frame that includes one or more indicators indicating multiple AP operation capabilities of the first AP and a second AP. The STA may transmit, to at least one of the first AP or the second AP, a multiple AP association request frame that enables the first AP to be associated with the second AP for a multiple AP operation. The STA may receive, from the first AP, a first multiple AP association response frame indicating acceptance or rejection of the multiple AP operation with the first AP. The STA may receive, from the second AP, a second multiple AP association response frame indicating acceptance or rejection of the multiple AP operation with the second AP.

公开(公告)号：US20250048429A1

公开(公告)日：2025-02-06

申请号：US18921420

申请日：2024-10-21

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Hanqing Lou ,  Xiaofei Wang ,  Oghenekome Oteri ,  Robert L. Olesen

IPC: H04W74/0808 ,  H04W84/12

Abstract: A STA may comprise a receiver configured to receive, from an AP, a first polling frame addressed to a broadcast address and sent to a plurality of STAs. The first polling frame may indicate a plurality of sub-channels. The STA may further comprise a transmitter configured to transmit, to the AP, a first PPDU indicating SNR information, on one or more sub-channels of the plurality of sub-channels, a SIFS after the first polling frame is received. The transmitter may be configured to transmit the first PPDU while a second PPDU is transmitted to the AP by another STA of the plurality of STAs, wherein the second PPDU is transmitted on one or more other sub-channels of the plurality of sub-channels.