公开(公告)号：WO2017083002A1

公开(公告)日：2017-05-18

申请号：PCT/US2016/051340

申请日：2016-09-12

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Chin-Hung ,  ZHANG, Ning ,  KIM, Youhan

IPC: H04B7/06

CPC classification number: H04L25/0202 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04L27/2601 ,  H04W72/0413 ,  H04W72/042 ,  H04W84/12

Abstract: A method for determining uplink channel information includes sending a trigger frame from an access point of a wireless network to a plurality of stations in the wireless network. The method also includes receiving an uplink transmission from at least one station of the plurality of stations in response to sending the trigger frame. The method further includes determining uplink channel data based on the uplink transmission. The method also includes sending the uplink channel data to the at least one station. The uplink channel data is usable by the at least one station to send data to the access point.

Abstract translation: 用于确定上行链路信道信息的方法包括从无线网络的接入点向无线网络中的多个站发送触发帧。 该方法还包括响应于发送触发帧而从多个站中的至少一个站接收上行链路传输。 该方法还包括基于上行链路传输来确定上行链路信道数据。 该方法还包括将上行链路信道数据发送到至少一个站。 上行链路信道数据可由至少一个站点用来向接入点发送数据。

公开(公告)号：WO2017083000A1

公开(公告)日：2017-05-18

申请号：PCT/US2016/050983

申请日：2016-09-09

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Chin-Hung ,  ZHANG, Ning ,  KIM, Youhan

IPC: H04B7/06

CPC classification number: H04L25/0202 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04L27/2601 ,  H04W72/0413 ,  H04W72/042 ,  H04W84/12

Abstract: A method for sending data includes receiving, at a first station of a plurality of stations, a trigger frame from an access point of a wireless network. The method also includes determining a downlink channel estimation based on the trigger frame and sending the downlink channel estimation to the access point. The method further includes receiving uplink channel data from the access point in response to sending the downlink channel estimation. The method also includes sending data to the access point based on the uplink channel data.

Abstract translation: 一种用于发送数据的方法包括：在多个站的第一站处接收来自无线网络的接入点的触发帧。 该方法还包括基于触发帧确定下行链路信道估计并将下行链路信道估计发送到接入点。 该方法还包括响应于发送下行链路信道估计而从接入点接收上行链路信道数据。 该方法还包括基于上行链路信道数据向接入点发送数据。

公开(公告)号：WO2017035293A1

公开(公告)日：2017-03-02

申请号：PCT/US2016/048528

申请日：2016-08-25

Applicant: QUALCOMM INCORPORATED

Inventor： JIA, Zhanfeng ,  RAISSINIA, Alireza ,  ASTERJADHI, Alfred ,  CHO, James, Simon ,  HOMCHAUDHURI, Sandip ,  KUMAR, Sumeet ,  MERLIN, Simone ,  ZHANG, Ning ,  RANGANATH, Ashok ,  O'DONNELL, Ian ,  YOUNG, Jason ,  SAMPATHKUMAR, BadriSrinivasan

IPC: H04W52/02

CPC classification number: H04W52/0258 ,  H04W52/0206 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0225 ,  H04W52/0229 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/22

Abstract: Methods, systems, and devices are described for saving power in wireless communications. One aspect includes providing an indication of a sleep duration for transmission to a wireless node, communicating with the wireless node during a target wakeup time (TWT), wherein the communication comprises at least one of providing data for transmission to the wireless node or obtaining data received from the wireless node, and refraining from providing data for transmission to the wireless node for at least the indicated sleep duration based at least in part on timing of the communication. Another aspect includes receiving an indication of a sleep duration from a wireless node, communicating with the wireless node during a time slot of a TWT, and entering a sleep mode for the indicated sleep duration based at least in part on timing of the communication with the wireless node during the time slot of the TWT.

Abstract translation: 描述了在无线通信中节省功率的方法，系统和设备。 一个方面包括在目标唤醒时间（TWT）期间提供用于传输到无线节点的睡眠持续时间的指示，与无线节点进行通信，其中该通信包括提供用于传输到无线节点的数据或获得数据的至少一个 从所述无线节点接收，并且至少部分地基于所述通信的定时，避免提供用于至少所指示的睡眠持续时间的无线节点传输的数据。 另一方面包括：在TWT的时隙期间从无线节点接收与无线节点通信的休眠持续时间的指示，以及至少部分地基于与所述无线节点的通信的定时 无线节点在TWT的时隙。

公开(公告)号：WO2014209876A1

公开(公告)日：2014-12-31

申请号：PCT/US2014/043640

申请日：2014-06-23

Applicant: QUALCOMM INCORPORATED

Inventor： SHI, Kai ,  CHO, James Simon ,  ZHANG, Ning

IPC: H04W48/16

CPC classification number: H04W24/08 ,  H04L69/22 ,  H04W24/10 ,  H04W40/244 ,  H04W48/16 ,  H04W84/12

Abstract: Systems and methods are provided for preferentially locating a candidate channel likely to have an active network during a WLAN scanning process of an increased bandwidth. The candidate channel may be detected using spectral analysis of a received signal that may involve any combination FFT captures and correlation operations associated with detecting packets. Upon identification of a candidate channel, a wireless communications device may switch to that channel to receive and process one or more packets to determine the existence of a BSS available for association.

Abstract translation: 提供了系统和方法，用于在增加的带宽的WLAN扫描过程期间优先地定位可能具有活动网络的候选信道。 可以使用可能涉及与检测分组相关联的任何组合FFT捕获和相关操作的接收信号的频谱分析来检测候选信道。 在识别候选信道之后，无线通信设备可以切换到该信道以接收和处理一个或多个分组，以确定可用于关联的BSS的存在。

公开(公告)号：WO2014137630A2

公开(公告)日：2014-09-12

申请号：PCT/US2014/017759

申请日：2014-02-21

Applicant: QUALCOMM INCORPORATED

Inventor： ALDANA, Carlos Horacio ,  ZHANG, Ning

IPC: H04W56/00

CPC classification number: H04W56/0035 ,  H04W40/244 ,  H04W56/003 ,  H04W88/08

Abstract: Systems and methods for calculating round trip time (RTT) between two wireless devices with respective clock drifts, while lowering the impact of the clock drifts on the RTT. A first RTT in a first direction is determined between a first wireless device and a second wireless device based on a first set of one or more messages exchanged between the first wireless device and the second wireless device. A second RTT in a second direction is determined between the second wireless device and the first wireless device based on a second set of one or more messages exchanged between the second wireless device and the first wireless device, and an average RTT of the first RTT and the second RTT is computed, wherein the average RTT has a low impact of the clock drifts.

Abstract translation: 用于计算具有相应时钟漂移的两个无线设备之间的往返时间（RTT）的系统和方法，同时降低时钟漂移对RTT的影响。 基于在第一无线设备和第二无线设备之间交换的第一组一个或多个消息，在第一无线设备和第二无线设备之间确定第一方向上的第一RTT。 基于在第二无线设备与第一无线设备之间交换的一个或多个消息的第二集合以及第一RTT的平均RTT，在第二无线设备与第一无线设备之间确定第二方向上的第二RTT，以及 计算第二RTT，其中平均RTT具有时钟漂移的低影响。

公开(公告)号：WO2014123773A1

公开(公告)日：2014-08-14

申请号：PCT/US2014/014062

申请日：2014-01-31

Applicant: QUALCOMM INCORPORATED

Inventor： DU, Shu ,  JIA, Zhanfeng ,  ZHANG, Ning ,  CHEN, Chin-hung ,  CHO, James, S. ,  TANDRA, Rahul ,  GAO, Qinghai

IPC: H04L1/00 ,  H04B7/04

CPC classification number: H04W24/02 ,  H04B7/0452 ,  H04L1/0007

Abstract: A method of providing aggregated MAC protocol data unit (AMPDU) duration control in a wireless communication device includes setting an AMPDU duration. Pass/fail statistics are collected for each MPDU of an AMPDU in a time window, W. A packet error rate (PER) difference is calculated between first and last sets of MPDUs for each AMPDU in the window. An average PER difference is calculated across all AMPDUs in the window. When the average PER difference is greater than a first threshold, then the AMPDU duration is decreased. When the difference is less than a second threshold, then the AMPDU duration is increased. When the difference is within the first and the second thresholds, then the method returns to the step of collecting for a next time window. The AMPDU duration can also be adjusted based on detected Doppler and line-of-sight transmissions.

Abstract translation: 在无线通信设备中提供聚合MAC协议数据单元（AMPDU）持续时间控制的方法包括设置AMPDU持续时间。 在时间窗口W中收集AMPDU的每个MPDU的通过/失败统计信息。在窗口中的每个AMPDU的第一组和最后一组MPDU之间计算分组错误率（PER）差异。 在窗口中的所有AMPDU之间计算平均PER差异。 当平均PER差大于第一阈值时，AMPDU持续时间减小。 当差值小于第二阈值时，AMPDU持续时间增加。 当差异在第一和第二阈值内时，该方法返回到下一个时间窗口的收集步骤。 AMPDU持续时间也可以根据检测到的多普勒和视线传输进行调整。

公开(公告)号：WO2014120609A1

公开(公告)日：2014-08-07

申请号：PCT/US2014/013202

申请日：2014-01-27

Applicant: QUALCOMM INCORPORATED

Inventor： DU, Shu ,  JIA, Zhanfeng ,  ZHANG, Ning ,  GAO, Qinghai

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00

CPC classification number: H04W72/085 ,  H04B7/0452 ,  H04B7/0619 ,  H04B7/0689 ,  H04L1/0003 ,  H04L1/0006 ,  H04L1/0009 ,  Y02D50/10

Abstract: A method of performing transmission from an access point (AP) in a wireless communication system provides transmission setting adjustment after sounding. In this method, stations associated with the AP and having transmission data can be identified. Transmission to those stations can be performed using a predetermined transmission setting. For a first transmission after a sounding, the predetermined transmission setting can be boosted. For any transmission other than the first transmission after the sounding, a current or adjusted transmission setting can be used based on a detected PER during transmission. An adjusted transmission setting can be an MCS rate, a user-level (SU-BF, 2U-MIMO, or 3U-MIMO), or aggregated MAC protocol data unit (AMPDU) aggregation level. A single transmission setting or a combination of settings can be used. The method can be used with any transmission setting(s), including those mapped from the Signal to Interference and Noise Ratio (SINR).

Abstract translation: 从无线通信系统中的接入点（AP）进行发送的方法在发声后提供发送设定调整。 在该方法中，可以识别与AP相关联并具有传输数据的站。 可以使用预定的传输设置来执行对这些站的传输。 对于发声后的第一次传输，可以提高预定的传输设置。 对于在发声之后的第一次传输之外的任何传输，可以基于传输期间的检测到的PER使用当前或调整的传输设置。 调整后的传输设置可以是MCS速率，用户级（SU-BF，2U-MIMO或3U-MIMO）或聚合的MAC协议数据单元（AMPDU）聚合级别。 可以使用单个传输设置或设置的组合。 该方法可以与任何传输设置一起使用，包括从信号到干扰和噪声比（SINR）映射的传输设置。

公开(公告)号：WO2013181439A1

公开(公告)日：2013-12-05

申请号：PCT/US2013/043432

申请日：2013-05-30

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Chin-Hung ,  ZHANG, Ning

IPC: H04B7/08

CPC classification number: H04B7/0814 ,  H04B7/0811

Abstract: A fast diversity technique using either an EESM or a capacity computation can determine antenna selection in a wireless communication device. A fast Fourier transform (FFT) for the EESM/ capacity computation can be performed with consecutive samples of a single symbol period of a short training field (STF) of a packet received by each antenna (304,306). The effective signal-to-noise ratio (SNR) for each antenna can be calculated using the results of the EESM or capacity computation (307). The antenna with the highest effective SNR is selected (308).

Abstract translation: 使用EESM或容量计算的快速分集技术可以确定无线通信设备中的天线选择。 可以利用由每个天线（304,306）接收的分组的短训练场（STF）的单个符号周期的连续采样来执行用于EESM /容量计算的快速傅里叶变换（FFT）。 可以使用EESM或容量计算的结果来计算每个天线的有效信噪比（SNR）（307）。 选择具有最高有效SNR的天线（308）。

公开(公告)号：WO2013163006A1

公开(公告)日：2013-10-31

申请号：PCT/US2013/037253

申请日：2013-04-18

Applicant: QUALCOMM INCORPORATED

Inventor： SU, Chi-Lin ,  ZHANG, Ning

IPC: H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0413 ,  H04B7/0617

Abstract: Transmitting beamforming can steer a transmitting signal to reduce the interference between spaces of a MIMO system and achieves constructive combination at the receiver. One method of steering matrix calculation includes using singular value decomposition (SVD). Notably, the singular values of SVD, which represent the stream strengths in a MIMO system, are in descending order. In equal modulation, signal strength degradation makes the receive EVM of the latest stream poor and increases the probability of packet error. MMSE can be used to weight the steering vectors of the steering matrix calculated in SVD. This weighting of the singular values can balance the SNR of the streams, thereby improving packet error rate.

Abstract translation: 发射波束成形可以引导发射信号以减少MIMO系统的空间之间的干扰，并在接收机处实现建设性的组合。 导向矩阵计算的一种方法包括使用奇异值分解（SVD）。 值得注意的是，代表MIMO系统中的流强度的SVD的奇异值是降序的。 在相等的调制中，信号强度的劣化使得最新流的接收EVM不佳，并增加了数据包错误的概率。 可以使用MMSE对以SVD计算的导向矩阵的导向矢量进行加权。 单数值的这种加权可以平衡流的SNR，从而提高分组错误率。

公开(公告)号：WO2013074424A1

公开(公告)日：2013-05-23

申请号：PCT/US2012/064524

申请日：2012-11-09

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Qifan ,  SHI, Kai ,  ZHANG, Ning

IPC: H04W64/00 ,  G01S5/02 ,  H04J3/06

CPC classification number: H04W24/08 ,  G01S7/40 ,  G01S13/765 ,  H04J3/0667

Abstract: A method and apparatus for improving the accuracy of a round trip time (RTT) estimate between a first device and a second device are disclosed. The method involves calculating an acknowledgement correction factor and a unicast correction factor. These correction factors are used to compensate for symbol boundary time errors resulting from multipath effects.

Abstract translation: 公开了一种用于提高第一设备和第二设备之间的往返时间（RTT）估计的准确性的方法和设备。 该方法涉及计算确认校正因子和单播校正因子。 这些校正因子用于补偿多径效应导致的符号边界时间误差。