公开(公告)号：US20150212193A1

公开(公告)日：2015-07-30

申请号：US14604103

申请日：2015-01-23

Applicant: Broadcom Corporation

Inventor： Manoj Mathew GEORGE ,  Mark GONIKBERG

IPC: G01S5/10 ,  H04W4/02

CPC classification number: G01S5/10 ,  H04W4/023 ,  H04W84/12

Abstract: Determining a mobile device's location, includes receiving, by the mobile device, a first packet from a first access point and generating a first time-stamp representing the first packet's arrival time; receiving, by the mobile device, a second packet from a second access point and generating a second time-stamp representing the second packet's arrival time; using these to determine the difference between the arrival times of the first and second packet at the mobile device; receiving, by the mobile device, first information representative of the first packet transmission time and second information representative of the second packet transmission time, the first and second information used to find the interval between the transmission of the first and second packets from the first and second access points respectively; determining, by the mobile device, the difference between the flight-times of the first and second packets to the mobile device; and determining, by the mobile device, the difference between the distance from itself to the first access point, and the distance from itself to the second access point and doing this over sufficient pairs of access points to find its location.

Abstract translation: 确定移动设备的位置，包括由移动设备接收来自第一接入点的第一分组，并产生表示第一分组到达时间的第一时间戳; 由所述移动设备从第二接入点接收第二分组，并产生表示所述第二分组的到达时间的第二时间戳; 使用它们来确定移动设备处的第一和第二分组的到达时间之间的差异; 由所述移动设备接收表示所述第一分组传输时间的第一信息和表示所述第二分组传输时间的第二信息，所述第一和第二信息用于查找从所述第一和第二分组的第一和第二分组的传输之间的间隔， 第二接入点; 由移动设备确定第一和第二分组的飞行时间与移动设备之间的差异; 以及由所述移动设备确定从其自身到所述第一接入点的距离与从其自身到所述第二接入点的距离之间的差异，并通过足够的接入点对来找到其位置。

公开(公告)号：US20150373664A1

公开(公告)日：2015-12-24

申请号：US14518245

申请日：2014-10-20

Applicant: Broadcom Corporation

Inventor： Manoj Mathew GEORGE ,  Yasantha Rajakarunanayake

IPC: H04W64/00

CPC classification number: H04W64/00

Abstract: Embodiments provide an indoor position system that can be used by an mobile device (legacy or non-legacy) without changes at the mobile device. In an embodiment, to use the indoor position system, a user of the mobile device downloads an application to the mobile device, which interfaces with the mobile device's existing wireless radio technology circuitry or module (e.g., WLAN chip) to obtain the position of the mobile device. In one embodiment, the indoor position system includes a plurality of wireless anchors with known positions that are each configured to receive a packet transmitted by the mobile device, time-stamp the packet per the arrival time of the packet, and forward the time-stamped packet to a pre-defined site. At the pre-defined site, the position of the mobile device is computed and sent to the application running on the mobile device.

Abstract translation: 实施例提供了可以由移动设备（传统或非传统）使用的室内位置系统，而无需在移动设备上进行改变。 在一个实施例中，为了使用室内位置系统，移动设备的用户将移动设备的应用下载到与移动设备的现有无线电技术电路或模块（例如，WLAN芯片）接口以获得 移动设备。 在一个实施例中，室内位置系统包括具有已知位置的多个无线锚点，每个无线锚点被配置为接收由移动设备发送的分组，按照分组的到达时间对分组进行时间戳记，并且转发时间戳 分组到预定义的站点。 在预定义的站点，移动设备的位置被计算并发送到在移动设备上运行的应用程序。