公开(公告)号：US09173183B1

公开(公告)日：2015-10-27

申请号：US13896113

申请日：2013-05-16

Applicant: Sprint Spectrum L.P.

Inventor： Amar Nath Ray ,  Warren B. Cope ,  Lyle Paczkowski

IPC: H04W4/02 ,  H04W56/00

CPC classification number: H04W56/0065

Abstract: A mobile device may obtain time difference of arrival (TDOA) measurements from wireless signals transmitted by a plurality of nodes. The plurality of nodes may include synchronized nodes that are synchronized to a time reference and an unsynchronized node that has a time synchronization error relative to the time reference. An estimated location of the mobile device can be determined based on the TDOA measurements. Another estimated location of the mobile device can be determined based on other data, such as the mobile device scanning an object having a known location. The time synchronization error can then be determined based on a distance between these estimated locations. Once the time synchronization error has been determined, it can be used to correct subsequent TDOA measurements involving the unsynchronized node.

Abstract translation: 移动设备可以从多个节点发送的无线信号获得到达时间差（TDOA）测量值。 多个节点可以包括与时间参考同步的同步节点和相对于时间参考具有时间同步误差的非同步节点。 可以基于TDOA测量来确定移动设备的估计位置。 可以基于诸如移动设备扫描具有已知位置的对象的其他数据来确定移动设备的另一估计位置。 然后可以基于这些估计位置之间的距离来确定时间同步误差。 一旦确定了时间同步错误，它可以用于纠正涉及非同步节点的后续TDOA测量。

公开(公告)号：US09052999B1

公开(公告)日：2015-06-09

申请号：US14024128

申请日：2013-09-11

Applicant: Sprint Spectrum L.P.

Inventor： Amar Nath Ray ,  Tracy L. Nelson

IPC: G06F17/00

CPC classification number: G06F17/00 ,  H04W4/02 ,  H04W4/90 ,  H04W64/00 ,  H04W76/50

Abstract: Disclosed is a method and corresponding system for transmitting a determined altitude of a user equipment device located in a building. One embodiment takes the form of a method. The method may involve determining a first distance between a node at a known position in a building and a user equipment device located in the building based on known planar coordinates of the node and known planar coordinates of the user equipment device. The method may further involve determining a second distance between the user equipment device and the node based on propagation of at least one signal between the node and the user equipment device. The method may further involve determining an altitude of the user equipment device based on the determined first distance, the determined second distance, and a known altitude of the node. And the method may involve transmitting the determined altitude of the user equipment device.

Abstract translation: 公开了一种用于发送位于建筑物中的用户设备装置的确定高度的方法和对应系统。 一个实施例采用方法的形式。 该方法可以包括基于已知的节点平面坐标和用户设备设备的已知平面坐标来确定建筑物中已知位置处的节点与位于建筑物中的用户设备设备之间的第一距离。 该方法还可以包括基于节点和用户设备设备之间的至少一个信号的传播来确定用户设备设备和节点之间的第二距离。 该方法还可以包括基于确定的第一距离，确定的第二距离以及节点的已知高度来确定用户设备设备的高度。 并且该方法可以涉及发送用户设备设备的确定的高度。

公开(公告)号：US09241316B1

公开(公告)日：2016-01-19

申请号：US13968009

申请日：2013-08-15

Applicant: Sprint Spectrum L.P.

Inventor： Amar Nath Ray ,  Douglas L. Richards ,  Robert Butler

IPC: G08C17/00 ,  H04W52/02

CPC classification number: H04W52/0261 ,  H04W52/0277 ,  H04W52/028 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164

Abstract: Methods and systems are provided for conserving resources of a wireless communication device (WCD). A WCD may be configured to operate in one of two modes while in communication with the RAN. In a high-power mode, the WCD operates with a filtering component having a first filtering bandwidth. The first a filtering bandwidth generally enables the WCD to provide high quality audio signals based on a first audio bandwidth of an audio codec. In a low-power mode, the WCD operates with the filtering component having a second filtering bandwidth. The second filtering bandwidth enables the WCD to provide a lower quality audio signal based on a second audio bandwidth having a narrower audio bandwidth than the first audio bandwidth.

Abstract translation: 提供了用于节省无线通信设备（WCD）的资源的方法和系统。 WCD可以被配置为在与RAN通信的情况下以两种模式之一工作。 在高功率模式下，WCD利用具有第一滤波带宽的滤波器组件进行操作。 第一个滤波带宽通常使得WCD能够基于音频编解码器的第一音频带宽来提供高质量的音频信号。 在低功率模式下，WCD与具有第二滤波带宽的滤波组件一起工作。 第二滤波带宽使得WCD能够基于具有比第一音频带宽更窄的音频带宽的第二音频带宽来提供较低质量的音频信号。

公开(公告)号：US09215653B1

公开(公告)日：2015-12-15

申请号：US14032349

申请日：2013-09-20

Applicant: Sprint Spectrum L.P.

Inventor： Amar Nath Ray

IPC: H04W72/00 ,  H04W52/02

CPC classification number: H04W52/0206 ,  H04W52/0277 ,  H04W52/028 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164

Abstract: Methods and systems are provided for conserving battery charge of a wireless communication device (WCD). A radio access network (RAN) and a WCD communicate with data encoded based on one of two codecs. By default, the RAN and the WCD communicate based on a first codec of the two codecs. Communication based on the first codec provides a high-quality audio signal between the RAN and WCD but uses more battery charge. When the battery charge decreases, the WCD can communicate a low-battery indicator to the RAN. Upon receiving the low-battery indicator, the RAN enables a transcoder configured to convert the data encoded based on the first codec into data encoded based on the second codec. After transcoding, RAN and the WCD communicate with based on the second codec. Communication based on the second codec provides a lower-quality audio signal between the RAN and WCD but uses less battery charge.

Abstract translation: 提供了用于节省无线通信设备（WCD）的电池电量的方法和系统。 无线电接入网络（RAN）和WCD与基于两个编解码器之一编码的数据进行通信。 默认情况下，RAN和WCD基于两个编解码器的第一个编解码器进行通信。 基于第一编解码器的通信在RAN和WCD之间提供高质量的音频信号，但是使用更多的电池电量。 当电池电量降低时，WCD可以将低电量指示器传送到RAN。 在接收到低电量指示符时，RAN使得被配置为将基于第一编解码器编码的数据转换成基于第二编解码器编码的数据的代码转换器。 在转码之后，RAN和WCD基于第二编解码器进行通信。 基于第二编解码器的通信在RAN和WCD之间提供较低质量的音频信号，但是使用较少的电池电量。