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    Passive positioning procedure and use of single burst ASAP FTM sessions
    62.
    发明授权
    Passive positioning procedure and use of single burst ASAP FTM sessions 有权

    公开(公告)号：US09907047B1

    公开(公告)日：2018-02-27

    申请号：US15354955

    申请日：2016-11-17

    Applicant: QUALCOMM Incorporated

    Inventor： Santosh Vamaraju ,  Xiaoxin Zhang ,  Rahul Malik

    IPC: H04W64/00 ,  G01S5/10 ,  H04W4/02 ,  H04W24/10 ,  H04L12/26

    CPC classification number: H04W64/003 ,  H04L43/0864 ,  H04W4/023 ,  H04W24/10 ,  H04W64/00

    Abstract: Techniques for estimating a position of an observing station are disclosed based on capturing, at the observing station, a first and a second FTM message exchanged between a first messaging station and a second messaging station. At the observing station, a first time of arrival of the first FTM message and a second time of arrival of the second FTM message may be determined. Based on contents of one or more FTM messages, a first transmission-related time associated with the first FTM message and a second transmission-related time associated with the second FTM message may be obtained. The position of the observing station may be estimated based on (1) a position of the first messaging station, (2) a position of the second messaging station, (3) the first time of arrival, (4) the second time of arrival, (5) the first transmission-related time, and (6) the second transmission-related time.

    UNICAST AND BROADCAST PROTOCOL FOR WIRELESS LOCAL AREA NETWORK RANGING AND DIRECTION FINDING
    63.
    发明申请
    UNICAST AND BROADCAST PROTOCOL FOR WIRELESS LOCAL AREA NETWORK RANGING AND DIRECTION FINDING 审中-公开

    公开(公告)号：US20170251449A1

    公开(公告)日：2017-08-31

    申请号：US15257824

    申请日：2016-09-06

    Applicant: QUALCOMM Incorporated

    Inventor： Rahul Malik ,  Ravi Hiranand Gidvani ,  Carlos Horacio Aldana

    IPC: H04W64/00 ,  H04W56/00

    CPC classification number: H04W64/003 ,  H04L27/2602 ,  H04W4/06 ,  H04W56/0065 ,  H04W84/12

    Abstract: Disclosed embodiments pertain to a first STA may broadcast a first Null Data Packet Announcement (NDPA) frame with an indication of one or more second STAs being polled. Subsequent to the first NDPA frame, a Null Data Packet (NDP) frame may be broadcast from a plurality of antennas on the first STA and one or more corresponding first Fine Timing Measurement (FTM) frames may be received in response. Each corresponding first FTM frame may be received from a distinct corresponding second STA and may comprise corresponding ranging measurements between the first STA and the corresponding second STA as determined by the corresponding second STA based on the NDP frame. In some embodiments, the one or more corresponding first FTM frames may be: received in response to a previously broadcast trigger frame, and encoded using Orthogonal Frequency Division Multiple Access. The trigger frame may be broadcast subsequent to the NDP frame.

    TRANSMITTER CAPABILITIES FOR ANGLE OF DEPARTURE
    64.
    发明申请
    TRANSMITTER CAPABILITIES FOR ANGLE OF DEPARTURE 审中-公开

    公开(公告)号：US20170131380A1

    公开(公告)日：2017-05-11

    申请号：US15346406

    申请日：2016-11-08

    Applicant: QUALCOMM Incorporated

    Inventor： Rahul Malik ,  Carlos Horacio Aldana

    IPC: G01S3/48 ,  G01S3/02 ,  H04L29/06

    CPC classification number: G01S3/48 ,  G01S1/024 ,  G01S1/026 ,  G01S1/30 ,  G01S3/023 ,  H04B7/086 ,  H04W64/00

    Abstract: Aspects of the present disclosure may compensate for a presence of phase ambiguity between transmit chains of a transmitting device when estimating angle of departure information of a wireless signal transmitted from the transmitting device. In some aspects, a receiving device may determine phase information of the wireless signal, and then determine whether there is a presence or absence of phase ambiguity between a number of transmit chains of the transmitting device. If there is presence of phase ambiguity in the transmitting device, then the receiving device may adjust the phase information of the received wireless signal. If there is an absence of phase ambiguity in the transmitting device, then the receiving device may not adjust the phase information. Thereafter, the receiving device may estimate the angle of departure of the wireless signal based on the selectively adjusted phase information.

    ENHANCED PREAMBLE WAVEFORM FOR COEXISTENCE
    65.
    发明申请
    ENHANCED PREAMBLE WAVEFORM FOR COEXISTENCE 审中-公开
    增强的前景波形

    公开(公告)号：US20160295420A1

    公开(公告)日：2016-10-06

    申请号：US15078095

    申请日：2016-03-23

    Applicant: QUALCOMM Incorporated

    Inventor： Tao Luo ,  Arumugam Chendamarai Kannan ,  Bin Tian ,  Rahul Malik

    IPC: H04W16/14 ,  H04W24/02

    Abstract: Methods, systems, and devices are described for wireless communication at a device. A Long Term Evolution Unlicensed (LTE-U) device may transmit an enhanced preamble that may be understood by Wireless Local Area Network (WLAN) devices, in addition to conveying a characteristic that is detectable by receiving LTE-U devices. The transmitting LTE-U device may generate the enhanced preamble by generating a first training field and a second training field. The characteristic that is detectable by receiving LTE-U devices may be a phase shift between the first and second training fields. Additionally or alternatively, the characteristic may be a sequence or tone mapping of the first or second training field. In some cases, the transmitting LTE-U device may introduce a third training field to the preamble which serves as the characteristic.

    Abstract translation: 描述了在设备处的无线通信的方法，系统和设备。 除了传送通过接收LTE-U设备可检测的特性之外，长期演进未许可（LTE-U）设备可以发送可被无线局域网（WLAN）设备理解的增强型前导码。 发送LTE-U设备可以通过生成第一训练场和第二训练场来生成增强的前同步码。 通过接收LTE-U设备可检测的特征可以是第一和第二训练场之间的相移。 附加地或替代地，特征可以是第一或第二训练场的序列或色调映射。 在某些情况下，发送的LTE-U设备可以将第三训练字段引入作为特征的前同步码。

    METHODS AND APPARATUS FOR REDUNDANT WAVEFORM PROTECTION IN A MIXED WIRELESS COMMUNICATION SYSTEM
    66.
    发明申请
    METHODS AND APPARATUS FOR REDUNDANT WAVEFORM PROTECTION IN A MIXED WIRELESS COMMUNICATION SYSTEM 审中-公开
    混合无线通信系统中冗余波形保护的方法与装置

    公开(公告)号：US20160255644A1

    公开(公告)日：2016-09-01

    申请号：US15051502

    申请日：2016-02-23

    Applicant: QUALCOMM Incorporated

    Inventor： Rahul Malik ,  Hemanth Sampath

    IPC: H04W72/12

    CPC classification number: H04W72/1215 ,  H04W74/0816 ,  H04W84/12

    Abstract: Certain aspects of the present disclosure relate to a methods and apparatus for wireless communication. In one aspect, a method of communication over a wireless medium includes transmitting, from a first wireless device, a first communication reserving access to the wireless medium during a first time period. The method further includes transmitting or receiving a long term evolution unlicensed (LTE-U) transmission during the first time period. The method further includes detecting, prior to the first time period, an interfering WLAN transmission that will result in its transmitter and recipients not detecting the first communication. The method further includes transmitting, after the interfering WLAN transmission, a second communication reserving access to the wireless medium during a second time period at least partially overlapping the first.

    Abstract translation: 本公开的某些方面涉及用于无线通信的方法和装置。 在一个方面，一种通过无线介质进行通信的方法包括：在第一时间段期间从第一无线设备发送保留对无线介质的访问的第一通信。 该方法还包括在第一时间段期间发送或接收长期进化未许可（LTE-U）传输。 该方法还包括在第一时间段之前检测将导致其发射机和接收者未检测到第一通信的干扰WLAN传输。 该方法还包括在干扰WLAN传输之后，在与第一个至少部分重叠的第二时间段期间，发送保留对无线介质的访问的第二通信。

    ESTIMATING WIRELESS CAPACITY
    67.
    发明申请
    ESTIMATING WIRELESS CAPACITY 有权
    估计无线容量

    公开(公告)号：US20160037558A1

    公开(公告)日：2016-02-04

    申请号：US14445870

    申请日：2014-07-29

    Applicant: QUALCOMM Incorporated

    Inventor： Rahul Malik ,  Jay Kumar Sundararajan ,  Manu Sharma

    IPC: H04W74/08

    CPC classification number: H04W74/08 ,  H04W72/00 ,  H04W84/12

    Abstract: A system and method are disclosed that may provide an accurate estimate of an AP's available medium share. The AP may perform a plurality medium access contention operations to determine a duration of a transmit opportunity and a queue service interval for each of a plurality of access categories. The AP may also determine a queue service interval for a number of packet queues associated with each of the access categories. The AP may use timing information derived from the medium access contention operations to estimate a portion of the medium share available on a per-access category and/or per-user basis. The timing information may include the transmit opportunity durations and queue service intervals for the access categories, the queue service intervals for the individual packet queues, and/or values indicative of the AP's PHY rate and medium utilization.

    Abstract translation: 公开了可以提供AP可用介质份额的准确估计的系统和方法。 AP可以执行多个媒体接入争用操作以确定多个接入类别中的每一个的发送机会的持续时间和队列服务间隔。 AP还可以确定与每个访问类别相关联的多个分组队列的队列服务间隔。 AP可以使用从媒体访问争用操作导出的定时信息来估计在每个访问类别和/或每个用户的基础上可用的一部分媒体共享。 定时信息可以包括访问类别的发送机会持续时间和队列服务间隔，用于各个分组队列的队列服务间隔，和/或指示AP的PHY速率和中等利用率的值。

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