公开(公告)号：US09520939B2

公开(公告)日：2016-12-13

申请号：US13787676

申请日：2013-03-06

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Jovicic ,  Ivan Klimek ,  Thomas Joseph Richardson ,  Junyi Li

IPC: H04B10/116 ,  G07C9/00

CPC classification number: H04B10/116 ,  G07C9/00309 ,  G07C9/00571 ,  G07C2009/00785 ,  H04K1/00

Abstract: Methods and apparatus for controlling access to secure areas are described. Time varying values are generated from access device identifiers, e.g., door identifiers. The time varying value, e.g., a hashed door identifier value, is transmitted as a VLC signal by a luminaire near the door to which the hashed identifier corresponds. A mobile detects the transmitted hashed door identifier value and sends an access request via a wireless signal, e.g., a radio signal. The access request includes a value generated from the received hashed door identifier and a mobile device identifier. A control device determines, from information in the access request and stored information indicating which mobile devices have authority to access which doors, if access should be granted to the door corresponding to the hashed access device identifier from which the received information was generated. The received information may be hash of the mobile identifier and hashed door identifier.

Abstract translation: 描述了用于控制对安全区域的访问的方法和装置。 从接入设备标识符（例如门标识符）产生时变值。 时间变化值（例如，散列的门标识符值）作为VLC信号由散列标识符对应的门附近的灯具发送。 移动台通过无线信号（例如无线电信号）检测所发送的散列门标识符值并发送接入请求。 访问请求包括从接收到的散列门标识符和移动设备标识符生成的值。 控制装置根据访问请求中的信息和存储的信息，确定哪些移动装置具有访问哪些门的权限，如果应该向门发出访问，对应于生成接收到的信息的散列访问设备标识符。 所接收的信息可以是移动标识符的哈希和散列的门标识符。

公开(公告)号：US09037001B2

公开(公告)日：2015-05-19

申请号：US13802733

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Jovicic ,  Thomas Joseph Richardson ,  Ivan Klimek

IPC: H04B10/00 ,  H04B10/116 ,  G03B7/00 ,  H04B10/114

CPC classification number: H04B10/116 ,  H04B10/1141

Abstract: Methods and apparatus related to the detection of low-rate visible light communication (VLC) signals and the recovery of information communicated by the VLC signals are described. Various methods and apparatus are well suited for embodiments in which a device, e.g., a smartphone, including a camera which uses a rolling shutter. The rolling shutter facilitates the collection of different time snapshots of a received low rate time varying VLC signal with different pixel rows in the image sensor of a frame corresponding to different time snapshots. In some embodiments, demodulation is used to recover and identify a single tone being communicated in a frame from among a plurality of possible alternative tones that may be communicated, each different tone corresponding to a different set of information bits.

Abstract translation: 描述了与检测低速可见光通信（VLC）信号相关的方法和装置以及由VLC信号传送的信息的恢复。 各种方法和装置非常适合于其中诸如智能手机的装置，包括使用滚动快门的相机的实施例。 滚动快门便于在对应于不同时间快照的帧的图像传感器中收集具有不同像素行的接收的低速率时变VLC信号的不同时间快照。 在一些实施例中，使用解调来恢复和识别在可以被传送的多个可能的替代音调之间的帧中传送的单个音调，每个不同音调对应于不同的信息比特集合。

公开(公告)号：US20140270796A1

公开(公告)日：2014-09-18

申请号：US13802733

申请日：2013-03-14

Applicant: QUALCOMM INCORPORATED

Inventor： Aleksandar Jovicic ,  Thomas Joseph Richardson ,  Ivan Klimek

IPC: H04B10/116 ,  G03B7/00

CPC classification number: H04B10/116 ,  H04B10/1141

Abstract: Methods and apparatus related to the detection of low-rate visible light communication (VLC) signals and the recovery of information communicated by the VLC signals are described. Various methods and apparatus are well suited for embodiments in which a device, e.g., a smartphone, including a camera which uses a rolling shutter. The rolling shutter facilitates the collection of different time snapshots of a received low rate time varying VLC signal with different pixel rows in the image sensor of a frame corresponding to different time snapshots. In some embodiments, demodulation is used to recover and identify a single tone being communicated in a frame from among a plurality of possible alternative tones that may be communicated, each different tone corresponding to a different set of information bits.

Abstract translation: 描述了与检测低速可见光通信（VLC）信号相关的方法和装置以及由VLC信号传送的信息的恢复。 各种方法和装置非常适合于其中诸如智能手机的装置，包括使用滚动快门的相机的实施例。 滚动快门便于在对应于不同时间快照的帧的图像传感器中收集具有不同像素行的接收的低速率时变VLC信号的不同时间快照。 在一些实施例中，使用解调来恢复和识别在可以被传送的多个可能的替代音调之间的帧中传送的单个音调，每个不同音调对应于不同的信息比特集合。

公开(公告)号：US20140255036A1

公开(公告)日：2014-09-11

申请号：US13787676

申请日：2013-03-06

Applicant: QUALCOMM INCORPORATED

Inventor： Aleksandar Jovicic ,  Ivan Klimek ,  Thomas Joseph Richardson ,  Junyi Li

IPC: H04B10/116

CPC classification number: H04B10/116 ,  G07C9/00309 ,  G07C9/00571 ,  G07C2009/00785 ,  H04K1/00

Abstract: Methods and apparatus for controlling access to secure areas are described. Time varying values are generated from access device identifiers, e.g., door identifiers. The time varying value, e.g., a hashed door identifier value, is transmitted as a VLC signal by a luminaire near the door to which the hashed identifier corresponds. A mobile detects the transmitted hashed door identifier value and sends an access request via a wireless signal, e.g., a radio signal. The access request includes a value generated from the received hashed door identifier and a mobile device identifier. A control device determines, from information in the access request and stored information indicating which mobile devices have authority to access which doors, if access should be granted to the door corresponding to the hashed access device identifier from which the received information was generated. The received information may be hash of the mobile identifier and hashed door identifier.

Abstract translation: 描述了用于控制对安全区域的访问的方法和装置。 从接入设备标识符（例如门标识符）产生时变值。 时间变化值（例如，散列的门标识符值）作为VLC信号由散列标识符对应的门附近的灯具发送。 移动台通过无线信号（例如无线电信号）检测所发送的散列门标识符值并发送接入请求。 访问请求包括从接收到的散列门标识符和移动设备标识符生成的值。 控制装置根据访问请求中的信息和存储的信息，确定哪些移动装置具有访问哪些门的权限，如果应该向门发出访问，对应于生成接收到的信息的散列访问设备标识符。 所接收的信息可以是移动标识符的哈希和散列的门标识符。