公开(公告)号：US20210044333A1

公开(公告)日：2021-02-11

申请号：US17078366

申请日：2020-10-23

申请人： Feng Jiang ,  Qinghua Li ,  Xiaogang Chen ,  Po-Kai Huang ,  Danny Alexander ,  Chen Kojokaro ,  Assaf Gurevitz ,  Ziv Avital

发明人： Feng Jiang ,  Qinghua Li ,  Xiaogang Chen ,  Po-Kai Huang ,  Danny Alexander ,  Chen Kojokaro ,  Assaf Gurevitz ,  Ziv Avital

IPC分类号： H04B7/024 ,  H04B7/06

摘要： An access point (AP) configured for multi-AP coordinated beamforming (CBF) and multi-AP joint transmission (JT) in an Extremely High Throughput (EHT) wireless local area network (WLAN), when operating as a master AP (AP1) in a multi-AP network, is configured to encode a null data packet announcement (NDPA) frame for multi-AP channel sounding. The NDPA is configured for transmission to a second AP (AP2) and a plurality of stations (STAs) of an EHT group. The NDPA may be encoded to have an information field indicating whether a sounding sequence type is for JT channel sounding or CBF channel sounding. The NDPA may further be encoded to include fields identifying the APs participating in the channel sounding. In these embodiments, the channel sounding sequence for JT can be reused for the channel sounding on CBF.

公开(公告)号：US20190281459A1

公开(公告)日：2019-09-12

申请号：US16424982

申请日：2019-05-29

申请人： Feng Jiang ,  Qinghua Li ,  Jonathan Segev ,  Xiaogang Chen ,  Po-Kai Huang ,  Huaning Niu

发明人： Feng Jiang ,  Qinghua Li ,  Jonathan Segev ,  Xiaogang Chen ,  Po-Kai Huang ,  Huaning Niu

IPC分类号： H04W12/06 ,  H04W72/04 ,  H04L5/00 ,  H04W24/10

摘要： This disclosure describes systems, methods, and devices related to long training field (LTF) sequence security protection. A device may determine a null data packet (NDP) frame comprising one or more fields. The device may determine a first long training field (LTF) and a second LTF, the first LTF and the second LTF being associated with a first frequency band of the NDP frame, wherein time domain LTF symbols of first LTF and the second LTF are generated using different LTF sequences. The device may determine a third LTF and a fourth LTF, the third LTF and the fourth LTF being associated with the a second frequency band of the NDP frame, wherein time domain LTF symbols of third LTF and the fourth LTF are generated using different LTF sequences. The device may cause to send the NDP frame to an initiating or a responding device. The device may cause to send a location measurement report (LMR) frame to the initiating or the responding device, wherein the LMR comprises timing information associated with the first frequency band and the second frequency band.

公开(公告)号：US10044421B2

公开(公告)日：2018-08-07

申请号：US14583253

申请日：2014-12-26

申请人： Qinghua Li ,  Xiaogang Chen ,  Huaning Niu ,  Yuan Zhu

发明人： Qinghua Li ,  Xiaogang Chen ,  Huaning Niu ,  Yuan Zhu

IPC分类号： H04B7/04 ,  H04B7/0452 ,  H04L29/06 ,  H04B7/06 ,  H04L5/00

摘要： Embodiments herein relate to wireless communication using combined channel training and physical layer header (SIG) signaling. Devices that comply with the 802.11ax or High Efficiency WLAN (HEW) standard may generate and transmit packets that include such combined information. The combined information may be beamformed to a receiver device via an OFDM signal, which may be decoded by the receiver device to obtain subsequent data included in the signal. For example, initial training symbols associated with channel training subcarriers in the signal may be detected and used to perform a rough estimate of the channel. The rough estimate may thereafter be refined using data symbols detected from adjacent data subcarriers using the channel training symbols. In this way, data subcarriers may also be used to determine a channel response along with channel training subcarriers. Channel training information may be transmitted with data, such as user-specific information, in a single symbol.

公开(公告)号：US10034194B2

公开(公告)日：2018-07-24

申请号：US13976464

申请日：2011-09-28

申请人： Yuan Zhu ,  Alexei Davydov ,  Kamran Etemad ,  Qinghua Li ,  Xiaogang Chen ,  Jong-Kae Fwu

发明人： Yuan Zhu ,  Alexei Davydov ,  Kamran Etemad ,  Qinghua Li ,  Xiaogang Chen ,  Jong-Kae Fwu

IPC分类号： H04W28/02 ,  H04N21/2365 ,  H04N21/643 ,  H04W52/02 ,  H04B7/0456 ,  H04W72/04 ,  H04W48/06 ,  H04L12/803 ,  H04L12/801 ,  H04L29/06 ,  H04L1/18 ,  H04L5/00 ,  H04J11/00 ,  H04L27/26 ,  H04L1/00 ,  H04B7/0413 ,  H04B7/0417 ,  H04W68/00 ,  H04B7/0452 ,  H04W72/12 ,  H04W12/06 ,  H04W12/08 ,  H04W88/02 ,  H04W4/70 ,  H04W88/06 ,  H04W36/14 ,  H04B7/06 ,  H04W84/12 ,  H04W88/10

摘要： An apparatus includes a processor a channel state information (CSI) module operative on the processor to evaluate channel state information for a multiplicity of transmission points and to allocate a selection of channel state information reference signals (CSI-RS) to an uplink sub-frame allotted for transmitting channel quality/precoding matrix index/rank indicator (CQI/PMI/RI) information to a transmission point. The apparatus may further include a wireless transceiver operative to transmit the selection of CSI-RS in the uplink sub-frame to the transmission point in a wireless network, and receive information from the transmission point in response to the CSI-RS and a digital display operative to present the information received from the transmission point.

公开(公告)号：US20180139077A1

公开(公告)日：2018-05-17

申请号：US15719392

申请日：2017-09-28

申请人： Yuval Amizur ,  Chittabrata Ghosh ,  Jonathan Segev ,  Feng Jiang ,  Qinghua Li ,  Nir Dvorecki ,  Robert J. Stacey

发明人： Yuval Amizur ,  Chittabrata Ghosh ,  Jonathan Segev ,  Feng Jiang ,  Qinghua Li ,  Nir Dvorecki ,  Robert J. Stacey

IPC分类号： H04L25/02 ,  H04W24/10 ,  H04L27/26

摘要： Embodiments of an access point (AP), station (STA) and method of sounding are generally described herein. The AP may transmit, during a transmission opportunity (TXOP), a trigger frame (TF) to indicate that an STA is to transmit an uplink sounding packet during an uplink sounding period of the TXOP. The AP may attempt to detect the uplink sounding packet during the uplink sounding period. If the uplink sounding packet is not detected during the uplink sounding period, the AP may transmit a recovery packet to cause other STAs to determine a busy condition during the uplink sounding period. If the uplink sounding packet is detected during the uplink sounding period, the AP may determine a channel estimate for the STA based at least partly on the uplink sounding packet.

公开(公告)号：US20170201956A1

公开(公告)日：2017-07-13

申请号：US15279907

申请日：2016-09-29

申请人： Po-Kai Huang ,  Robert J. Stacey ,  Qinghua Li

发明人： Po-Kai Huang ,  Robert J. Stacey ,  Qinghua Li

IPC分类号： H04W56/00

CPC分类号： H04W56/0005 ,  H04B7/0452 ,  H04L27/2601 ,  H04L69/323 ,  H04W72/1289 ,  H04W74/006 ,  H04W74/0808 ,  H04W84/12

摘要： Methods, computer readable media, and wireless apparatuses are disclosed for a TXOP duration field. An apparatus is disclosed comprising processing circuitry configured to: encode a first high efficiency (HE) physical-layer convergence procedure (PLCP) protocol data unit (PPDU) comprising a transmission opportunity (TXOP) duration field in a first physical-layer portion of the first HE PPDU. The processing circuitry may be further configured to set the TXOP duration field value to indicate a largest duration value representable by the TXOP duration field that is equal to or less than a duration value indicated by the first MAC duration field, if the first HE PPDU is to include a first media access control (MAC) duration field in a first MAC-layer portion of the first HE PPDU.

公开(公告)号：US20160255610A1

公开(公告)日：2016-09-01

申请号：US14998211

申请日：2015-12-26

申请人： Qinghua Li ,  Xiaogang Chen ,  Robert Stacey ,  Chittabrata Ghosh ,  Yuan Zhu ,  Rongzhen Yang

发明人： Qinghua Li ,  Xiaogang Chen ,  Robert Stacey ,  Chittabrata Ghosh ,  Yuan Zhu ,  Rongzhen Yang

IPC分类号： H04W72/04 ,  H04B7/04 ,  H04L1/00

CPC分类号： H04W72/042 ,  H04B7/0413 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/0083 ,  H04W72/0453 ,  H04W84/12

摘要： Methods, devices and systems for jointly encoding allocation information of one or more wireless communication stations in a common portion of a physical layer header are disclosed. In some examples, a wireless device may: generate allocation information associated with one or more wireless communication stations; encode the allocation information into the common portion of the physical layer header; and transmit the physical layer header to the one or more wireless communication stations.

摘要翻译： 公开了用于在物理层报头的公共部分中共同编码一个或多个无线通信站的分配信息的方法，设备和系统。 在一些示例中，无线设备可以：生成与一个或多个无线通信站相关联的分配信息; 将分配信息编码到物理层报头的公共部分中; 并将所述物理层报头发送到所述一个或多个无线通信站。

公开(公告)号：US20160233940A1

公开(公告)日：2016-08-11

申请号：US14747224

申请日：2015-06-23

申请人： Po-Kai Huang ,  Qinghua Li ,  Robert J. Stacey ,  Rongzhen Yang

发明人： Po-Kai Huang ,  Qinghua Li ,  Robert J. Stacey ,  Rongzhen Yang

IPC分类号： H04B7/06 ,  H04W72/08 ,  H04B7/04 ,  H04L27/26 ,  H04W76/02

CPC分类号： H04B7/0697 ,  H04B7/0452 ,  H04L5/0023 ,  H04L5/0092 ,  H04L27/26 ,  H04W4/70 ,  H04W16/10 ,  H04W52/247 ,  H04W52/343 ,  H04W72/082 ,  H04W84/12

摘要： Wireless devices, methods and computer readable media for spatial reuse in a high efficiency wireless local-area network. An apparatus of a HEW station may comprise circuitry. The circuitry may be configured to determine if a plurality of links with a plurality of wireless stations are device-to-device links that indicate that there is a spatial reuse opportunity; and transmit a packet that comprises a spatial reuse indication that there is the spatial reuse opportunity, if the spatial reuse opportunity is indicated. The spatial reuse opportunity may be an uplink orthogonal frequency division multiple access (OFDMA) with the plurality of wireless stations, a downlink OFDMA with the plurality of wireless stations, or a downlink multiple users multiple-input multiple-output (MU-MIMO). The spatial reuse indication may include a margin that indicates how a second HEW station may adjust a transmit power and clear channel assessment to use within the spatial opportunity.

摘要翻译： 无线设备，方法和用于在高效率无线局域网中进行空间重用的计算机可读介质。 HEW站的装置可以包括电路。 电路可以被配置为确定具有多个无线站的多个链路是否是指示存在空间重用机会的设备到设备链路; 并且如果指示空间重用机会，则发送包括空间重用指示的分组，其中存在空间重用机会。 空间复用机会可以是与多个无线站的上行链路正交频分多址（OFDMA），与多个无线站的下行OFDMA，或下行链路多用户多输入多输出（MU-MIMO）。 空间复用指示可以包括指示第二HEW站如何调整发射功率并且清除信道评估以在空间机会内使用的裕度。

公开(公告)号：US20160128074A1

公开(公告)日：2016-05-05

申请号：US14751561

申请日：2015-06-26

申请人： Po-Kai Huang ,  Robert J. Stacey ,  Qinghua Li ,  Rongzhen Yang

发明人： Po-Kai Huang ,  Robert J. Stacey ,  Qinghua Li ,  Rongzhen Yang

IPC分类号： H04W72/08 ,  H04L29/06 ,  H04W52/18 ,  H04L29/12

CPC分类号： H04W52/18 ,  H04L69/22 ,  H04W52/247 ,  H04W52/248 ,  H04W74/002 ,  H04W74/0816 ,  H04W84/12

摘要： Apparatus, computer readable medium, and method for generating and receiving signal fields in a high efficiency wireless local-area network (WLAN) are disclosed. A high-efficiency wireless local-area network (HEW) device including circuitry is disclosed. The circuitry may be configured to: receive a physical (PHY) header or media access control (MAC) header from a second HEW station, wherein the PHY header or MAC header comprises an indication of a spatial reuse opportunity and a defer duration; adjust one or more parameters to determine whether or not the wireless medium is in use; and determine whether to transmit within the spatial reuse opportunity based on the adjusted one or more parameters. The circuitry may be configured to adjust one or more parameters to determine whether or not the wireless medium is in use in where the parameters are signal detect (SD) threshold, a mid-packet detection (MPD) threshold, and an energy detection (ED) threshold.

摘要翻译： 公开了一种用于在高效率无线局域网（WLAN）中生成和接收信号场的设备，计算机可读介质和方法。 公开了一种包括电路的高效无线局域网（HEW）设备。 电路可以被配置为：从第二HEW站接收物理（PHY）报头或媒体访问控制（MAC）报头，其中PHY报头或MAC报头包括空间重用机会和延迟持续时间的指示; 调整一个或多个参数以确定无线介质是否在使用中; 并且基于所调整的一个或多个参数来确定是否在所述空间重用机会内发送。 电路可以被配置为调整一个或多个参数以确定无线介质是否在哪里使用，其中参数是信号检测（SD）阈值，中间包检测（MPD）阈值和能量检测（ED ）门槛。

公开(公告)号：US20160127909A1

公开(公告)日：2016-05-05

申请号：US14745743

申请日：2015-06-22

申请人： Po-Kai Huang ,  Robert J. Stacey ,  Qinghua Li ,  Rongzhen Yang

发明人： Po-Kai Huang ,  Robert J. Stacey ,  Qinghua Li ,  Rongzhen Yang

IPC分类号： H04W16/02 ,  H04W76/02 ,  H04W72/08 ,  H04L27/26

CPC分类号： H04W16/02 ,  H04L5/0007 ,  H04L5/0062 ,  H04L5/0091 ,  H04L27/261 ,  H04W28/0236 ,  H04W40/16 ,  H04W72/046 ,  H04W72/082 ,  H04W72/1231 ,  H04W76/14 ,  H04W76/23 ,  H04W84/12 ,  H04W84/20

摘要： Methods, computer readable media, and apparatuses are disclosed for spatial reuse. A high efficiency station (HE STA) that includes circuitry is disclosed. The circuitry may be configured to: determine if a link with a wireless device is a D2D link with a spatial reuse opportunity; and transmit a packet that includes an indication that there is the spatial reuse opportunity for the duration of the packet, if the link with the wireless device is the D2D link with the spatial reuse opportunity. The circuitry may be configured to: receive a packet from a second HE STA, where the packet includes an indication that there is a spatial opportunity for the duration of the packet; adjust at least one of the following group: a transmit power and a clear channel assessment parameter; and transmit a second packet to a wireless device in the spatial opportunity in accordance with D2D communication.

摘要翻译： 公开了用于空间重用的方法，计算机可读介质和装置。 公开了一种包括电路的高效率站（HE STA）。 电路可以被配置为：确定与无线设备的链路是否是具有空间重用机会的D2D链路; 并且如果与无线设备的链路是具有空间重用机会的D2D链路，则发送包括在分组的持续时间内存在空间重用机会的指示的分组。 电路可以被配置为：从第二HE STA接收分组，其中分组包括在分组的持续时间内存在空间机会的指示; 调整以下组中的至少一个：发射功率和清除信道评估参数; 并根据D2D通信在空间机会中向无线设备发送第二分组。