公开(公告)号：US09055458B2

公开(公告)日：2015-06-09

申请号：US13762338

申请日：2013-02-07

Applicant: QUALCOMM Incorporated

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

IPC: H04W24/02 ,  H04W28/00 ,  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：US20140269358A1

公开(公告)日：2014-09-18

申请号：US13829272

申请日：2013-03-14

Applicant: QUALCOMM INCORPORATED

Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Shu Du

IPC: H04L12/26 ,  H04W24/08

CPC classification number: H04L43/0888 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0689

Abstract: Systems and methods are disclosed for generating a statistical profile of a MIMO channel. Packets of information may be transmitted over an interval of time to a plurality of stations using a plurality of MIMO modes. Each packet may be binned and a goodput value corresponding to the bin, the station and the MIMO mode may be determined stored.

Abstract translation: 公开了用于生成MIMO信道的统计简档的系统和方法。 信息包可以使用多个MIMO模式通过时间间隔传送到多个站。 可以对每个分组进行分组，并且可以确定存储对应于bin，站和MIMO模式的有效输入值。

公开(公告)号：US20140160947A1

公开(公告)日：2014-06-12

申请号：US13707511

申请日：2012-12-06

Applicant: QUALCOMM INCORPORATED

Inventor： Shu Du ,  Zhanfeng Jia ,  Ning Zhang ,  Guido Robert Frederiks ,  Vincent Knowles Jones, IV ,  Qinghai Gao

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626 ,  H04J9/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/203 ,  H04W28/06 ,  Y02D50/10

Abstract: A method of providing rate adaptation in a multi-user wireless communication system including single-user beamforming (SU-BF) and multi-user multiple-input multiple-output (MU-MIMO) is described. In this method, a master rate, which is a modulation and coding scheme (MCS) for the SU-BF, is determined. An MCS for each transmit mode is derived from the master rate using a rate mapping. Using the results from the mapping, the master rate, instead of the MCS for each transmit mode, is tracked. In one embodiment, a mapping calibration is periodically performed.

Abstract translation: 描述了在包括单用户波束成形（SU-BF）和多用户多输入多输出（MU-MIMO）的多用户无线通信系统中提供速率适配的方法。 在该方法中，确定作为SU-BF的调制和编码方案（MCS）的主速率。 使用速率映射从主速率导出每个发送模式的MCS。 使用映射的结果，跟踪每个传输模式的主速率而不是MCS。 在一个实施例中，定期执行映射校准。

公开(公告)号：US10070454B2

公开(公告)日：2018-09-04

申请号：US14857562

申请日：2015-09-17

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Ragab Elsherif ,  Qinghai Gao ,  Xiaolong Huang ,  Ehab Tahir ,  Nathaniel Houghton ,  Vincent Knowles Jones, IV ,  Srinivas Katar

IPC: H04B7/04 ,  H04L1/00 ,  H04W72/12 ,  H04W72/10 ,  H04B7/0452 ,  H04B7/06 ,  H04W72/04 ,  H04L5/00

Abstract: Methods, systems, and apparatuses are described for wireless communications. More particularly, an access point (AP) identifies a plurality of multi-user multiple-input multiple-output (MU-MIMO) groups associated with a wireless station (STA). The AP determines a communication metric associated with each of the plurality of MU-MIMO groups. The communication metric provides an indication of the compatibility of the STAs in the MU-MIMO group. The AP prioritizes at least one of the plurality of MU-MIMO groups based at least in part on the communication metric associated with the prioritized MU-MIMO group. The AP creates a preferred group list and/or a blacklisted group list and included the prioritized MU-MIMO group in the appropriate group list.

公开(公告)号：US09860765B2

公开(公告)日：2018-01-02

申请号：US14968321

申请日：2015-12-14

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Ragab Elsherif ,  Qinghai Gao

IPC: H04W24/02 ,  H04B7/04 ,  H04L1/00 ,  H04L5/00 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/06 ,  H04L25/02 ,  G01S11/10

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.

公开(公告)号：US09860084B2

公开(公告)日：2018-01-02

申请号：US14812977

申请日：2015-07-29

Applicant: QUALCOMM Incorporated

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

IPC: H04L12/40 ,  H04L25/02 ,  H04W24/02 ,  H04L1/00 ,  H04L5/00

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.

公开(公告)号：US09806775B2

公开(公告)日：2017-10-31

申请号：US15141380

申请日：2016-04-28

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Ragab Elsherif ,  Qinghai Gao ,  Eugene Baik

IPC: H04B7/0452 ,  H04L5/00

CPC classification number: H04B7/0452 ,  H04L5/006

Abstract: Methods, systems, and devices are described for wireless communication. In one aspect, a method of wireless communication includes selecting, by a wireless device, a first subset from a first set of candidate multi-user groups of stations. The first subset is based at least in part on first-level grouping metrics associated with the first set of candidate multi-user groups. The method further includes determining second-level grouping metrics associated with a second set of candidate multi-user groups. The second set corresponds to candidate multi-user groups having a greater number of stations or channel vectors than the first set, and the second set is based at least in part on the first subset.

公开(公告)号：US20170295516A1

公开(公告)日：2017-10-12

申请号：US15094677

申请日：2016-04-08

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Nathaniel David Houghton ,  Ehab Tahir

IPC: H04W28/06 ,  H04W24/04

CPC classification number: H04W28/065 ,  H04L1/1848 ,  H04L47/27 ,  H04L47/34 ,  H04W24/04 ,  H04W28/0242 ,  H04W84/12

Abstract: Methods, systems, and devices for wireless communication are described. A device may identify an indication of a station load in a wireless local area network (WLAN) and estimate a delay to fill a packet hole at the medium access control (MAC) layer based on the station load. The estimated time period may be used to adjust a reorder timeout value. In some cases the reorder timeout value may be increased when the station load is high to reduce the likelihood that packet holes will be flushed to higher layers before the device is served with the missing packets. In some cases, the station load may be determined based on a message received from a serving access point (AP).

公开(公告)号：US09590707B1

公开(公告)日：2017-03-07

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: H04K1/10 ,  H04L27/28 ,  H04B7/04 ,  H04L5/00 ,  H04W16/28

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。

公开(公告)号：US20170063437A1

公开(公告)日：2017-03-02

申请号：US15141380

申请日：2016-04-28

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Ragab Elsherif ,  Qinghai Gao ,  Eugene Baik

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

CPC classification number: H04B7/0452 ,  H04L5/006

Abstract: Methods, systems, and devices are described for wireless communication. In one aspect, a method of wireless communication includes selecting, by a wireless device, a first subset from a first set of candidate multi-user groups of stations. The first subset is based at least in part on first-level grouping metrics associated with the first set of candidate multi-user groups. The method further includes determining second-level grouping metrics associated with a second set of candidate multi-user groups. The second set corresponds to candidate multi-user groups having a greater number of stations or channel vectors than the first set, and the second set is based at least in part on the first subset.

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第一组候选多用户组站中选择第一子集。 第一子集至少部分地基于与第一组候选多用户组相关联的第一级分组度量。 该方法还包括确定与第二组候选多用户组相关联的二级分组度量。 第二组对应于具有比第一组更多的站或信道向量的候选多用户组，并且第二组至少部分地基于第一子集。