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    ROUND TRIP TIME DETERMINATION
    55.
    发明公开
    ROUND TRIP TIME DETERMINATION 审中-公开
    周转时间确定

    公开(公告)号：EP3189599A1

    公开(公告)日：2017-07-12

    申请号：EP15756706.6

    申请日：2015-07-30

    申请人： Qualcomm Incorporated

    发明人： ALDANA, Carlos Horacio ,  VAN NEE, Didier Johannes Richard ,  JONES IV, Vincent Knowles

    IPC分类号： H04B7/04 ,  H04W4/02 ,  H04J3/06

    CPC分类号： H04L43/0864 ,  H04B7/0404 ,  H04B7/0413 ,  H04J3/0667 ,  H04W4/023 ,  H04W24/10 ,  H04W56/0005 ,  H04W72/0446 ,  H04W88/02 ,  H04W88/08

    摘要： Round trip time (RTT) measurements may be obtained from downlink (DL) trigger frame and uplink (UL) Multiple-Input Multiple-Output (MIMO) frame transactions, which can replace and/or complement separate RTT measurements. By implementing such techniques, wireless systems can make access to RTT measurements, and consequently, location determination of access points (APs) within the system, more easily accessible to navigation and/or other applications benefitting from such measurements and determinations.

    摘要翻译： 往返时间（RTT）测量可以从下行链路（DL）触发帧和上行链路（UL）多输入多输出（MIMO）帧事务中获得，其可以替代和/或补充单独的RTT测量。 通过实施这样的技术，无线系统可以访问RTT测量，并且因此可以访问系统内的接入点（AP）的位置确定，导航和/或从这种测量和确定中受益的其他应用更容易访问。

    SYSTEMS AND METHODS OF NETWORK CLOCK COMPARISON
    56.
    发明公开
    SYSTEMS AND METHODS OF NETWORK CLOCK COMPARISON 审中-公开
    系统和网络时钟比较方法

    公开(公告)号：EP3164955A1

    公开(公告)日：2017-05-10

    申请号：EP15738216.9

    申请日：2015-06-30

    申请人： Qualcomm Incorporated

    发明人： CHO, James Simon ,  RAISSINIA, Alireza ,  ALDANA, Carlos Horacio ,  HUANG, Xiaolong

    IPC分类号： H04J3/06

    CPC分类号： H04J3/0661 ,  H04J3/0664 ,  H04J3/0667 ,  H04J3/0697

    摘要： A method includes receiving, at a first device, a packet from a second device. The method also includes detecting receipt of the packet at a detection circuit. The method further includes, in response to detecting the receipt of the packet, capturing a time of arrival timestamp corresponding to the packet at a capture circuit. The method also includes receiving, at the first device, a time of departure timestamp corresponding to the packet from the second device. The time of departure timestamp indicates a time when the packet is sent from the second device. The method further includes performing a comparison of the time of arrival timestamp and the time of departure timestamp.

    摘要翻译： 一种方法包括在第一设备处从第二设备接收分组。 该方法还包括在检测电路处检测分组的接收。 该方法进一步包括，响应于检测到分组的接收，在捕捉电路捕捉对应于该分组的到达时间戳。 该方法还包括在第一设备处从第二设备接收与分组相对应的出发时间戳的时间。 出发时间戳的时间表示从第二设备发送分组的时间。 该方法还包括执行到达时间戳和出发时间戳的时间的比较。

    REDUCING IMPACT OF CLOCK DRIFT IN WIRELESS DEVICES
    57.
    发明公开
    REDUCING IMPACT OF CLOCK DRIFT IN WIRELESS DEVICES 审中-公开
    VERRINGERUNG DER AUSWIRKUNG VON TAKTABWEICHUNG在DRAHTLOSEN VORRICHTUNGEN

    公开(公告)号：EP2965576A2

    公开(公告)日：2016-01-13

    申请号：EP14710124.0

    申请日：2014-02-21

    申请人： Qualcomm Incorporated

    发明人： ALDANA, Carlos Horacio ,  ZHANG, Ning

    IPC分类号： H04W56/00

    CPC分类号： H04W56/0035 ,  H04W40/244 ,  H04W56/003 ,  H04W88/08

    摘要： 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.

    摘要翻译： 用于计算两个无线设备之间具有相应时钟漂移的往返时间（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和第一无线设备之间交换的一个或多个消息的第二组以及第一RTT的平均RTT和第二无线设备的平均RTT，在第二无线设备和第一无线设备之间确定第二方向上的第二RTT 计算第二RTT，其中平均RTT对时钟漂移的影响较小。