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    MULTIDIMENSIONAL ALGORITHM FOR ROAMING
    32.
    发明申请
    MULTIDIMENSIONAL ALGORITHM FOR ROAMING 有权
    用于漫游的多维算法

    公开(公告)号：US20150098392A1

    公开(公告)日：2015-04-09

    申请号：US14048464

    申请日：2013-10-08

    Applicant: QUALCOMM Incorporated

    Inventor： Sandip Homchaudhuri ,  Shu Du ,  Sumeet Kumar ,  Sohani Ganesh Rao ,  Paul Husted

    IPC: H04W48/20

    CPC classification number: H04W48/20 ,  H04L5/0055 ,  H04W36/14 ,  H04W40/244 ,  H04W84/12 ,  H04W88/08

    Abstract: Methods, devices, and apparatuses are described for wireless communications using a multidimensional algorithm for roaming. In one aspect, an initial set of candidate access points (APs) is produced by a station using a roaming scan. The initial set may be identified based at least in part on an initial metric (e.g., beacon signal strength). A probe signal may be transmitted by the station to at least one of the candidate APs in the initial set and information may be received in response to the probe signals. The station may then identify a reduced set from the initial set based at least in part on the received information, where the reduced set is used to select a target AP. At least one additional metric may be identified and the probe signal may be configured to obtain information corresponding to the additional metrics. This information may be used by the station to select the candidate APs in the reduced set.

    Abstract translation: 描述了使用用于漫游的多维算法的无线通信的方法，设备和装置。 在一个方面，候选接入点（AP）的初始集合由使用漫游扫描的站产生。 可以至少部分地基于初始度量（例如，信标信号强度）来识别初始设置。 探测信号可以由站发送到初始设置中的候选AP中的至少一个，并且响应于探测信号可以接收信息。 然后，站可以至少部分地基于接收到的信息来识别来自初始集合的缩减集合，其中使用缩减集合来选择目标AP。 可以识别至少一个附加度量，并且可以将探测信号配置为获得对应于附加度量的信息。 该信息可以由站使用以选择缩减集中的候选AP。

    SYSTEMS AND METHODS FOR SCHEDULING SU AND MU MIMO TRAFFIC
    33.
    发明申请
    SYSTEMS AND METHODS FOR SCHEDULING SU AND MU MIMO TRAFFIC 有权
    用于调度SU和MU MIMO交通的系统和方法

    公开(公告)号：US20140269962A1

    公开(公告)日：2014-09-18

    申请号：US13830881

    申请日：2013-03-14

    Applicant: QUALCOMM INCORPORATED

    Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Guido R. Frederiks ,  James S. Cho ,  Shu Du

    IPC: H04B7/04

    CPC classification number: H04B7/0413 ,  H04B7/0452 ,  H04L1/00 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/1614 ,  H04L1/1628 ,  H04L1/1887 ,  H04W28/0231 ,  H04W72/1226 ,  H04W72/1231 ,  H04W72/1263

    Abstract: Systems and methods are disclosed for scheduling SU and MU traffic in a MIMO communications system. Net goodput may be estimated for a station using a plurality of MIMO modes and a transmission to the station may be scheduled using one of the MIMO modes based, at least in part, on the estimated net goodput. Estimating net goodput may include determining a number of bits that may be successfully transmitted to the station using the MIMO mode divided by a time required to transmit the number of bits plus the sounding time. Further, the number of bits that may be successfully transmitted to the station may be based on the number of packets that may be delivered over the upcoming sounding interval and statistically determined goodput for each MIMO mode.

    Abstract translation: 公开了用于在MIMO通信系统中调度SU和MU业务的系统和方法。 可以针对使用多个MIMO模式的站估计净有效吞吐量，并且可以至少部分地基于估计的净功率输出，使用MIMO模式之一来调度到站的传输。 估计净有效吞吐量可以包括使用MIMO模式除以传送比特数加上探测时间所需的时间来确定可以成功发送到站的比特数。 此外，可以成功发送到站的比特数可以基于可以通过即将到来的探测间隔递送的分组的数量，以及针对每个MIMO模式的统计确定的输出。

    SYSTEMS AND METHODS FOR OPTIMIZING SOUNDING INTERVAL
    34.
    发明申请
    SYSTEMS AND METHODS FOR OPTIMIZING SOUNDING INTERVAL 有权
    用于优化声音间隔的系统和方法

    公开(公告)号：US20140269961A1

    公开(公告)日：2014-09-18

    申请号：US13830177

    申请日：2013-03-14

    Applicant: QUALCOMM INCORPORATED

    Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Shu Du

    IPC: 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。

    Method And System For Boosting Transmission Settings Based On Signal To Interference And Noise Ratio
    35.
    发明申请
    Method And System For Boosting Transmission Settings Based On Signal To Interference And Noise Ratio 审中-公开
    基于信号干扰和噪声比的增强传输设置的方法和系统

    公开(公告)号：US20140211642A1

    公开(公告)日：2014-07-31

    申请号：US13754823

    申请日：2013-01-30

    Applicant: QUALCOMM INCORPORATED

    Inventor： Shu Du ,  Zhanfeng Jia ,  Ning Zhang ,  Qinghai Gao

    IPC: H04W72/08

    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 an 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。

    Scheduling Transmission For Multi-User, Multiple-Input, Multiple-Output Data
    36.
    发明申请
    Scheduling Transmission For Multi-User, Multiple-Input, Multiple-Output Data 有权
    多用户，多输入，多输出数据的调度传输

    公开(公告)号：US20140092819A1

    公开(公告)日：2014-04-03

    申请号：US13633849

    申请日：2012-10-02

    Applicant: QUALCOMM INCORPORATED

    Inventor： Shu Du ,  Zhanfeng Jia ,  Ning Zhang ,  Qinghai Gao ,  Balaji Srinivasan Babu

    IPC: H04W72/04 ,  H04W72/10

    CPC classification number: H04B7/0452 ,  H04W72/121 ,  H04W72/1221

    Abstract: An access point determines the buffered data for each station of a plurality of stations in a BSS and groups the stations with similar station characteristics. The transmission time to the stations in a group can be apportioned. The groups can be ordered based on station characteristics and a transmission history. A sounding for a group can be performed based on the order. The MU-MIMO transmission for the group can be performed until a first condition is met. If the first condition is met, then the sounding and the MU-MIMO transmission for a next group can be performed, according to the order, until a second condition is met. The first condition can include an apportioned transmission time having expired and/or the buffers for the group being flushed. The second condition can include new data having been buffered by the AP and/or all buffered data having been transmitted.

    Abstract translation: 接入点确定BSS中多个站的每个站的缓冲数据，并对具有相似站特征的站进行分组。 可以分配到组中的站的传输时间。 可以根据车站特性和发送历史来订购组。 可以根据订单执行组的探测。 可以执行组的MU-MIMO传输，直到满足第一条件。 如果满足第一条件，则可以根据顺序执行下一组的发声和MU-MIMO传输，直到满足第二条件。 第一个条件可以包括分配的传输时间已经到期，和/或被刷新的组的缓冲区。 第二条件可以包括已被AP缓冲的新数据和/或已经发送的所有缓冲数据。

    Methods permitting a wireless system receiver to determine and report channel conditions to a system transmitter
    39.
    发明授权
    Methods permitting a wireless system receiver to determine and report channel conditions to a system transmitter 有权
    允许无线系统接收机确定并向系统发射机报告信道条件的方法

    公开(公告)号：US09191146B2

    公开(公告)日：2015-11-17

    申请号：US13924377

    申请日：2013-06-21

    Applicant: QUALCOMM Incorporated

    Inventor： Zhanfeng Jia ,  Shu Du ,  Ning Zhang

    IPC: H04L1/00 ,  H04L1/16 ,  H04L1/20

    CPC classification number: H04L1/00 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/1671 ,  H04L1/20

    Abstract: A method of providing feedback on channel observations to a transmitter includes observing a channel at a receiver based on received signals from the transmitter and determining whether a packet error rate (PER) is rising based on the observing. The receiver determines whether a rising PER is caused by channel noise or interference, and transmits a message to the transmitter indicating the cause of the rising PER. The cause may be encoded in reserved bits of a block acknowledgement (BA) frame or an Acknowledge (ACK) frame, or in a modulation coding scheme (MCS) used to transmit the message. The cause may be detected in response to SNR/RSSI level of received signals, or a number of receiver restarts. The transmitter may change the transmit rate adaptation algorithm to use a lower MCS if channel noise causes the rising PER, and a higher MCS if interference causes the rising PER.

    Abstract translation: 向发射机提供信道观测的反馈的方法包括基于来自发射机的接收信号观察接收机处的信道，并基于观测确定分组差错率（PER）是否正在上升。 接收机确定上升的PER是由信道噪声还是干扰引起的，并且向发射机发送指示引起增加的PER的原因的消息。 原因可以在块确认（BA）帧或应答（ACK）帧的保留位或者用于发送消息的调制编码方案（MCS）中编码。 可以响应于接收到的信号的SNR / RSSI电平或者接收机重启的次数来检测原因。 如果信道噪声导致上升的PER，则发射机可以改变发射速率自适应算法以使用较低的MCS，如果干扰导致上升的PER，则发射机可以改变较高的MCS。

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