Patents by Inventor Ruofeng LIU

Ruofeng LIU 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).

  • Patent number: 11923887
    Abstract: Systems, devices, and techniques for allowing communication between two or more computing devices are described herein. For example, a method includes receiving, by a first computing device configured to operate in accordance with a first wireless protocol, one or more data packets via one or more signals output by a second computing device according to a second wireless protocol, where the first computing device is not configured to operate in accordance with the second wireless protocol. Additionally, or alternatively, a method includes receiving, by a first computing device configured to operate in accordance with a first wireless protocol, at least one signal including a data packet, wherein a payload of the data packet comprises an indication of a symbol defined in accordance with a second wireless protocol.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: March 5, 2024
    Assignee: Regents of the University of Minnesota
    Inventors: Tian He, Wenchao Jiang, Ruofeng Liu
  • Publication number: 20230417890
    Abstract: A method includes emitting a sound by a first device. The method also includes receiving a recorded sound at the first device, where the recorded sound includes a recording of the emitted sound by a second device. The method further includes determining an intermediate frequency (IF) signal based on the emitted sound and the recorded sound. The method also includes determining a distance between the first device and the second device based on a frequency of the IF signal and one or more characteristics of the emitted sound. In addition, the method includes presenting the determined distance.
    Type: Application
    Filed: September 12, 2022
    Publication date: December 28, 2023
    Inventors: Wenjun Jiang, Ruofeng Liu, Xun Chen
  • Publication number: 20220006482
    Abstract: Systems, devices, and techniques for allowing communication between two or more computing devices are described herein. For example, a method includes receiving, by a first computing device configured to operate in accordance with a first wireless protocol, one or more data packets via one or more signals output by a second computing device according to a second wireless protocol, where the first computing device is not configured to operate in accordance with the second wireless protocol. Additionally, or alternatively, a method includes receiving, by a first computing device configured to operate in accordance with a first wireless protocol, at least one signal including a data packet, wherein a payload of the data packet comprises an indication of a symbol defined in accordance with a second wireless protocol.
    Type: Application
    Filed: October 25, 2019
    Publication date: January 6, 2022
    Inventors: Tian He, Wenchao Jiang, Ruofeng Liu
  • Patent number: 10749991
    Abstract: In general, a system is described that includes two computing devices, a first which is configured to operate using a first wireless protocol and a second which is configured to operate using a second wireless protocol different than the first wireless protocol. The first computing device may determine a symbol to be sent to the second computing device. For each bit included in a payload of a data packet, the first computing device may set a value of the respective bit such that the symbol, when the data packet is translated into at least one signal using the first wireless protocol, is readable using the second wireless protocol. The first computing device generates the signal using the first wireless protocol, and outputs, via the first wireless protocol, the at least one signal. The second computing device may receive the at least one signal and demodulate the payload.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: August 18, 2020
    Assignee: Regents of the University of Minnesota
    Inventors: Tian He, Zhijun Li, Ruofeng Liu, Wenchao Jiang
  • Patent number: 10507832
    Abstract: In a drive control device, a controller automatically stops an engine if an execution condition of an idling stop is satisfied, and an electric oil pump is driven during an automatic stop of the engine. A first friction engaging element establishes a starting gear position and a second friction engaging element is released when a vehicle starts. A second solenoid drains oil to be supplied to the second friction engaging element according to an indicator current. A drain degree becomes smaller by reducing the indicator current. The controller reduces the indicator current below a minimum value during the automatic stop of the engine.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: December 17, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Yoshinobu Kawamoto, Ruofeng Liu, Hideshi Wakayama
  • Publication number: 20180352055
    Abstract: In general, a system is described that includes two computing devices, a first which is configured to operate using a first wireless protocol and a second which is configured to operate using a second wireless protocol different than the first wireless protocol. The first computing device may determine a symbol to be sent to the second computing device. For each bit included in a payload of a data packet, the first computing device may set a value of the respective bit such that the symbol, when the data packet is translated into at least one signal using the first wireless protocol, is readable using the second wireless protocol. The first computing device generates the signal using the first wireless protocol, and outputs, via the first wireless protocol, the at least one signal. The second computing device may receive the at least one signal and demodulate the payload.
    Type: Application
    Filed: May 31, 2018
    Publication date: December 6, 2018
    Inventors: Tian He, Zhijun Li, Ruofeng Liu, Wenchao Jiang
  • Publication number: 20180281799
    Abstract: In a drive control device, a controller automatically stops an engine if an execution condition of an idling stop is satisfied, and an electric oil pump is driven during an automatic stop of the engine. A first friction engaging element establishes a starting gear position and a second friction engaging element is released when a vehicle starts. A second solenoid drains oil to be supplied to the second friction engaging element according to an indicator current. A drain degree becomes smaller by reducing the indicator current. The controller reduces the indicator current below a minimum value during the automatic stop of the engine.
    Type: Application
    Filed: August 9, 2016
    Publication date: October 4, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Yoshinobu KAWAMOTO, Ruofeng LIU, Hideshi WAKAYAMA