Patents by Inventor Xiaofu Ma

Xiaofu Ma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Proximity detection using device-to-device communication links
    Patent number: 11510028
    Abstract: Techniques for performing high-precision presence detection by establishing and monitoring peer-to-peer communication links between user devices residing in a same physical environment. A user device that resides in the environment may establish communication links with multiple other user devices residing in the environment. The user device may monitor the channel properties for those communication links to detect fluctuations in the channel properties caused by a user moving through a signal of the communication links. In examples where the user device detects fluctuations in channel properties for multiple communication links, the user device may determine that the user had moved though signals of the communication links. The user device may determine that, because the user moved through signals of multiple communication links, the user may be in close proximity to the user device, such as in the same room.
    Type: Grant
    Filed: June 17, 2021
    Date of Patent: November 22, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Qinghai Gao, Qiang Hu, Avinash Joshi, Piyush Tayal, QingYun Wei, Xiaofu Ma
  • Proximity detection using device-to-device communication links
    Patent number: 11070945
    Abstract: Techniques for performing high-precision presence detection by establishing and monitoring peer-to-peer communication links between user devices residing in a same physical environment. A user device that resides in the environment may establish communication links with multiple other user devices residing in the environment. The user device may monitor the channel properties for those communication links to detect fluctuations in the channel properties caused by a user moving through a signal of the communication links. In examples where the user device detects fluctuations in channel properties for multiple communication links, the user device may determine that the user had moved though signals of the communication links. The user device may determine that, because the user moved through signals of multiple communication links, the user may be in close proximity to the user device, such as in the same room.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: July 20, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Qinghai Gao, Qiang Hu, Avinash Joshi, Piyush Tayal, QingYun Wei, Xiaofu Ma