公开(公告)号：US20170033950A1

公开(公告)日：2017-02-02

申请号：US14812977

申请日：2015-07-29

Applicant: QUALCOMM Incorporated

Inventor： Nathaniel HOUGHTON ,  Xiaolong Huang ,  Guido Robert Frederiks ,  Qinghai Gao

IPC: H04L25/02 ,  H04W24/02

CPC classification number: H04L25/0224 ,  H04L1/0027 ,  H04L5/00 ,  H04W24/02

Abstract: Various aspects are provided for managing a sounding interval of a wireless communications device, which may include setting a timing of one or more channel sounding operations performed by the communications device. For instance, a method is provided for channel sounding management. This example method may include obtaining information regarding a modulation and coding scheme (MCS) or a throughput degradation gradient associated with one or more transmissions. In addition, the example method may include determining a timing of one or more sounding operations based on the information regarding the MCS or the throughput degradation gradient. Additionally, apparatuses and computer-readable media are provided for channel sounding management in a communications device, which are configured to perform, or store computer-executable code to perform, the disclosed example methods.

Abstract translation: 提供用于管理无线通信设备的探测间隔的各个方面，其可以包括设置由通信设备执行的一个或多个信道探测操作的定时。 例如，提供了一种用于信道探测管理的方法。 该示例性方法可以包括获得关于与一个或多个传输相关联的调制和编码方案（MCS）或吞吐量劣化梯度的信息。 此外，示例性方法可以包括基于关于MCS的信息或吞吐量降级梯度来确定一个或多个探测操作的定时。 此外，设备和计算机可读介质被提供用于通信设备中的信道探测管理，通信设备被配置为执行或存储计算机可执行代码来执行所公开的示例方法。

公开(公告)号：US09219569B2

公开(公告)日：2015-12-22

申请号：US13843720

申请日：2013-03-15

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Vishnu Vardhan Bala Krishnan ,  Shu Du ,  Zhanfeng Jia

IPC: H04L12/28 ,  H04B7/14 ,  H04L1/00 ,  H04L1/16 ,  H04W28/22

CPC classification number: H04L1/0001 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/1614 ,  H04L1/1628 ,  H04W28/22

Abstract: Various aspects of the disclosure described herein provide for optimizing rate control during a selection of a communications profile from a set of communications profiles by taking into account effective frame aggregation size as a function of packet error rate (PER). An expected throughput may also be determined for each communications profile and updated after each transmission so that a communications profile having the highest expected throughput may be chosen for a particular frame transmission.

Abstract translation: 本文所描述的公开内容的各个方面提供了在通过考虑作为分组错误率（PER）的函数的有效帧聚合大小的情况下，在从一组通信简档选择通信简档期间优化速率控制。 还可以为每个通信简档确定期望的吞吐量，并且在每个传输之后更新，以便可以针对特定的帧传输选择具有最高预期吞吐量的通信简档。

公开(公告)号：US09124318B2

公开(公告)日：2015-09-01

申请号：US14059073

申请日：2013-10-21

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Qinghai Gao ,  James Simon Cho ,  Chin-Hung Chen ,  Didier Johannes Richard Van Nee

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00

CPC classification number: H04B7/0452 ,  H04B7/0617 ,  H04B7/0691 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/009 ,  H04L1/06 ,  H04L1/1621 ,  H04L1/1685

Abstract: An access point can include an array of antennas and a smart antenna selector. The smart antenna selector is configured to select a subset of antennas from the antenna array for use in multi-user multiple-input multiple-output (MU MIMO) data transmissions. Stations that are communicatively coupled to the access point can be selected for inclusion in a multi-user group based, at least in part, on performance measurements of the stations. Performance measurements are determined directly and indirectly from data transmissions sent in response to sounding packets. Antennas for use in MU MIMO data transmissions are selected for the antenna array based, at least in part, on previous antenna selections used for single user data transmissions.

Abstract translation: 接入点可以包括天线阵列和智能天线选择器。 智能天线选择器被配置为从天线阵列中选择天线的子集，以用于多用户多输入多输出（MU MIMO）数据传输。 可以至少部分地基于站的性能测量来选择通信地耦合到接入点的站点以包括在多用户组中。 性能测量直接和间接地从响应于声音分组发送的数据传输确定。 至少部分地基于用于单用户数据传输的先前天线选择天线阵列来选择用于MU MIMO数据传输的天线。

公开(公告)号：US09055459B2

公开(公告)日：2015-06-09

申请号：US13762342

申请日：2013-02-07

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Zhanfeng Jia ,  Ning Zhang ,  James S. Cho ,  Qinghai Gao ,  Rahul Tandra

IPC: H04W24/02 ,  H04B7/04 ,  H04L1/00

CPC classification number: H04W24/02 ,  H04B7/0452 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0019 ,  H04L1/0033 ,  H04L1/06 ,  Y02D50/10

Abstract: A method of performing dual-mode rate control for an access point in a wireless communication system includes a single-user mode of operation and a multi-user mode of operation. In the single-user mode, a basic rate for a station is determined based on channel conditions. In the multi-user mode, a rate for a plurality of stations is determined using tracking. The tracking includes performing a sounding for the plurality of stations. An initial multi-user current rate is then set equal to a function of a number of users and the basic rate. A transmission is sent to the plurality of stations using the current rate. A packet error rate (PER) is detected during transmission to the plurality of stations. The current rate is adjusted based on the PER. After rate adjustment, either sounding is triggered or the method returns to sending a transmission using the current rate.

Abstract translation: 对无线通信系统中的接入点进行双模速率控制的方法包括单用户操作模式和多用户操作模式。 在单用户模式中，基于信道条件确定站的基本速率。 在多用户模式中，使用跟踪确定多个站的速率。 跟踪包括对多个站执行探测。 然后将初始多用户当前速率设置为等于用户数和基本速率的函数。 使用当前速率向多个站发送传输。 在传输到多个站期间检测到分组错误率（PER）。 当前费率根据PER进行调整。 速率调整后，触发声音或方法返回使用当前速率发送传输。

公开(公告)号：US08929474B2

公开(公告)日：2015-01-06

申请号：US13830177

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Shu Du

IPC: H04B7/02 ,  H04L1/02 ,  H04L1/00

CPC classification number: H04L1/0027 ,  H04L25/0224

Abstract: Systems and methods are disclosed for optimizing the sounding interval in a MIMO communications system. Following a channel sounding protocol, net throughput may be estimated over time. The sounding interval may correspond to the period of time between the end of the sounding protocol and a time when the estimated net throughput is maximized. Estimating net throughput may involve estimating the number of bits that may be successfully transmitted divided by the time required to transmit. The number of bits that may be successfully transmitted may be estimated from a statistical channel profile including goodput.

Abstract translation: 公开了用于优化MIMO通信系统中的探测间隔的系统和方法。 根据频道侦听协议，可以估计随时间的净吞吐量。 探测间隔可以对应于探测协议结束与估计净吞吐量最大化的时间之间的时间段。 估计净吞吐量可以包括估计可以成功发送的比特数除以发送所需的时间。 可以从包括有效输出的统计信道简档估计可以成功发送的比特数。

公开(公告)号：US09986581B2

公开(公告)日：2018-05-29

申请号：US14847551

申请日：2015-09-08

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Ahmed Ragab Elsherif ,  Xiaolong Huang ,  Guido Robert Frederiks ,  Chao Zou

IPC: H04L12/863 ,  H04W72/12 ,  H04L12/26 ,  H04B7/0452 ,  H04W72/00 ,  H04W4/08 ,  H04W28/08 ,  H04L12/803

CPC classification number: H04W72/121 ,  H04B7/0452 ,  H04L43/0852 ,  H04L47/125 ,  H04L47/50 ,  H04W4/08 ,  H04W28/08 ,  H04W72/00

Abstract: Methods, systems, and devices are described for wireless communication. In one aspect, a method of wireless communication includes determining a transmit time metric associated with each transmission group of a number of transmission groups based at least in part on an amount of data in a transmit queue and a modulation and coding scheme (MCS) data rate for at least one wireless communication device in the transmission group. The method also includes scheduling a transmission to a first transmission group of the number of transmission groups based at least in part on the transmit time metric for the first transmission group.

公开(公告)号：US20170302401A1

公开(公告)日：2017-10-19

申请号：US15132990

申请日：2016-04-19

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Nathaniel David Houghton ,  Ahmed Ragab Elsherif ,  Ehab tahir

IPC: H04L1/00 ,  H04W72/08 ,  H04B7/04

CPC classification number: H04L1/0003 ,  H04B7/0452 ,  H04L1/003 ,  H04W72/085

Abstract: Wireless node selects modulation coding schemes (MCS) and number of spatial streams for transmitting data to devices via a MU-MIMO transmission based on the total number of spatial streams. In one implementation, a wireless node selects first MCS, first number of spatial stream(s) for a first device, and total number of spatial streams to be used in the MU-MIMO transmission so as to maximize the data rate to the first device, then selects a second MCS and a second number of spatial stream(s) for a second device based on the selected total number of spatial streams. In another implementation, the wireless node toggles the first selection of the MCS and spatial stream(s) between the first and second devices for fairness purposes. In another implementation, a wireless selects the MCS and the spatial streams for the receiving nodes so as to maximize the aggregate data rate for the MU-MIMO transmission.

公开(公告)号：US20170064568A1

公开(公告)日：2017-03-02

申请号：US14968321

申请日：2015-12-14

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Ragab Elsherif ,  Qinghai Gao

IPC: H04W24/02 ,  H04L5/00 ,  H04L1/00 ,  H04B7/04

CPC classification number: H04W24/02 ,  G01S11/10 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0617 ,  H04L1/0009 ,  H04L5/006 ,  H04L25/0222

Abstract: Methods, systems, and devices are described for wireless communication. In one aspect, a method of wireless communication includes receiving, by a first wireless device, beamforming information from a station over a period of time, the beamforming information including a feedback signal-to-noise ratio (SNR) value and compressed feedback matrix. The method also includes determining one or more SNR gradient metrics for the station based at least in part on the received feedback SNR values and the received compressed feedback matrices.

Abstract translation: 描述了用于无线通信的方法，系统和设备。 一方面，一种无线通信方法包括：在一段时间内由第一无线设备接收来自站的波束成形信息，所述波束成形信息包括反馈信噪比（SNR）值和压缩反馈矩阵。 该方法还包括至少部分地基于所接收的反馈SNR值和接收到的压缩反馈矩阵来确定站的一个或多个SNR梯度度量。

公开(公告)号：US20170064566A1

公开(公告)日：2017-03-02

申请号：US15141370

申请日：2016-04-28

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Ragab Elsherif ,  Qinghai Gao ,  Eugene Baik

IPC: H04W16/28 ,  H04L5/00 ,  H04B7/04

CPC classification number: H04W16/28 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0456 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/006

Abstract: Methods, systems, and devices are described for wireless communication. In one aspect, a method of wireless communication includes receiving, by a wireless device, beamforming information from a plurality of stations. The beamforming information includes feedback signal-to-noise ratio (SNR) values and beamforming feedback matrices. The method further includes determining a metric associated with a candidate group of the plurality of stations based at least in part on the received feedback SNR values and the received beamforming feedback matrices. The metric indicates a correlation between spatial streams of multi-user multiple-input-multiple-output (MU-MIMO) transmissions intended for the stations of the candidate group.

Abstract translation: 描述了用于无线通信的方法，系统和设备。 一方面，一种无线通信方法包括：由无线设备从多个站接收波束成形信息。 波束成形信息包括反馈信噪比（SNR）值和波束形成反馈矩阵。 该方法还包括至少部分地基于所接收的反馈SNR值和接收的波束成形反馈矩阵来确定与多个站的候选组相关联的度量。 该度量指示针对候选组的站的多用户多输入多输出（MU-MIMO）传输的空间流之间的相关性。

公开(公告)号：US20170063438A1

公开(公告)日：2017-03-02

申请号：US14842592

申请日：2015-09-01

Applicant: QUALCOMM Incorporated

Inventor： Eugene Baik ,  Ahmed Ragab Elsherif ,  Qinghai Gao ,  Gregory Steele ,  Srinivas Katar ,  Didier Johannes Richard van Nee ,  Ehab Tahir

IPC: H04B7/04 ,  H04W16/28 ,  H04L5/00

CPC classification number: H04L5/006 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0632 ,  H04L5/0023 ,  H04L5/0037

Abstract: Methods, systems, and devices are described for wireless communication. In one aspect, a method of wireless communication includes receiving, by a first wireless device, compressed beamforming information from each of a plurality of stations, the compressed beamforming information including a feedback signal-to-noise ratio (SNR) value and compressed feedback matrix. The method also includes determining a multi-user signal-to-interference-plus noise ratio (SINR) metric for each of the plurality of stations based at least in part on the received feedback SNR values and the received compressed feedback matrices.

Abstract translation: 描述了用于无线通信的方法，系统和设备。 一方面，一种无线通信方法包括：由第一无线设备从多个站中的每一个接收压缩波束成形信息，所述压缩波束成形信息包括反馈信噪比（SNR）值和压缩反馈矩阵 。 该方法还包括至少部分地基于所接收的反馈SNR值和接收的压缩反馈矩阵来确定多个站中的每一个的多用户信号与干扰加噪声比（SINR）度量。