Patents by Inventor Chia-Lung Liu

Chia-Lung 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).

  • Publication number: 20210119740
    Abstract: A system and a method for signal sensing are provided. The system for signal sensing includes a sensing device, a processor and a time server coupled to the sensing device. The sensing device includes a plurality of receivers and an oscillator coupled to the receivers. The receivers are synchronized by receiving a time synchronization signal from the time server. The receivers monitor a plurality of signals of an object according to a clock generated by the oscillator and obtains a plurality of channel state information (CSI) according to the signals. The processor calculates an angle of arrival of the signals according to the CSI.
    Type: Application
    Filed: December 29, 2020
    Publication date: April 22, 2021
    Applicant: Industrial Technology Research Institute
    Inventors: Ting-Wu Ho, Chia-Lung Liu, Fu-Te Hsu
  • Publication number: 20210022619
    Abstract: A system and a method for signal sensing are provided. The system for signal sensing includes a processor, a transmitter, a receiver, and an oscillator. The oscillator is coupled to the transmitter and the receiver. The oscillator generates a clock signal. The transmitter transmits a plurality of output signals according to the clock signal. The receiver receives a first output signal reflected by an object according to the clock signal and obtains a channel state information according to the first output signal. The processor identifies a state of the object according to the channel state information and outputs the state of the object.
    Type: Application
    Filed: December 26, 2019
    Publication date: January 28, 2021
    Applicant: Industrial Technology Research Institute
    Inventors: Ting-Wu Ho, Chia-Lung Liu, Fu-Te Hsu
  • Patent number: 10763978
    Abstract: Provided is a wireless positioning calibration system, including a plurality of transmission base stations, at least one sniffer base station and a positioning server. The at least one sniffer base station receives a plurality of channel state information (CSI) transmitted by the plurality of transmission base stations. The positioning server receives the plurality of CSI transmitted by the at least one sniffer base station. The positioning server calculates a phase error and an antenna spacing error generated by the at least one sniffer base station by means of the plurality of CSI, and compensates the phase error and the antenna spacing error. A wireless positioning calibration method is also provided.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: September 1, 2020
    Assignee: Industrial Technology Research Institute
    Inventors: Pi-Chen Chui, Ting-Wu Ho, Chia-Lung Liu
  • Patent number: 10732254
    Abstract: The disclosure provides a channel-based positioning device, a channel-based positioning system and a channel-based positioning method. The channel-based positioning method includes: calculating a plurality of angles of arrival (AoA), a plurality of angles of departure (AoD) and a plurality of time of flight (ToF) of signals according to a plurality of channel state information transmitted from a terminal apparatus to a base station; determining a path type of the signals according to the plurality of AoA, AoD and ToF of the signals; and calculating a position information of the terminal apparatus relative to the base station through a specific algorithm.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: August 4, 2020
    Assignee: Industrial Technology Research Institute
    Inventors: Pi-Chen Chiu, Ting-Wu Ho, Chia-Lung Liu
  • Publication number: 20200178835
    Abstract: A method, a device, and a system for measuring physiological state information based on channel state information are provided. The method includes: respectively transmitting, by at least two transmitting antennas of a transmitter, a measurement signal. Respectively receiving, by at least two receiving antennas of a receiver, a reflected signal reflected the measurement signal through a target object. Obtaining, by the receiver, channel state information (CSI) between the transmitting antennas and the receiving antennas according to the reflected signals. Receiving, by a computing device, the CSI transmitted by the receiver and obtaining physiological state information of the target object according to the CSI.
    Type: Application
    Filed: December 26, 2018
    Publication date: June 11, 2020
    Inventors: Chia-Lung LIU, Chai-Hien GAN
  • Publication number: 20200083965
    Abstract: Provided is a wireless positioning calibration system, including a plurality of transmission base stations, at least one sniffer base station and a positioning server. The at least one sniffer base station receives a plurality of channel state information (CSI) transmitted by the plurality of transmission base stations. The positioning server receives the plurality of CSI transmitted by the at least one sniffer base station. The positioning server calculates a phase error and an antenna spacing error generated by the at least one sniffer base station by means of the plurality of CSI, and compensates the phase error and the antenna spacing error. A wireless positioning calibration method is also provided.
    Type: Application
    Filed: December 21, 2018
    Publication date: March 12, 2020
    Inventors: Pi-Chen Chui, Ting-Wu Ho, Chia-Lung Liu
  • Patent number: 10511356
    Abstract: A multi-antenna network system has a reduced operational complexity for matrix inversion by referring to the variations of the status of a plurality of communication channels at a first time duration and a second time duration. Therefore, the speed for calculating matrix inversion is improved. Accordingly, the amount of servo antennas and/or user antennas operating in the same multi-antenna network system can be increased.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: December 17, 2019
    Assignees: ALPHA NETWORKS INC., INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chia-Lung Liu, Dong-Shing Wu, Ren Hao Chen
  • Publication number: 20190146052
    Abstract: The disclosure provides a channel-based positioning device, a channel-based positioning system and a channel-based positioning method. The channel-based positioning method includes: calculating a plurality of angles of arrival (AoA), a plurality of angles of departure (AoD) and a plurality of time of flight (ToF) of signals according to a plurality of channel state information transmitted from a terminal apparatus to a base station; determining a path type of the signals according to the plurality of AoA, AoD and ToF of the signals; and calculating a position information of the terminal apparatus relative to the base station through a specific algorithm.
    Type: Application
    Filed: December 14, 2017
    Publication date: May 16, 2019
    Inventors: Pi-Chen Chiu, Ting-Wu Ho, Chia-Lung Liu
  • Publication number: 20190103901
    Abstract: A multi-antenna network system has a reduced operational complexity for matrix inversion by referring to the variations of the status of a plurality of communication channels at a first time duration and a second time duration. Therefore, the speed for calculating matrix inversion is improved. Accordingly, the amount of servo antennas and/or user antennas operating in the same multi-antenna network system can be increased.
    Type: Application
    Filed: November 27, 2017
    Publication date: April 4, 2019
    Inventors: CHIA-LUNG LIU, Dong-Shing Wu, Ren Hao Chen
  • Patent number: 10103905
    Abstract: A method for transmitting channel information, adapted to a base station, includes steps of: receiving a first uplink reference signal and a second uplink reference signal from a user device, obtaining an uplink channel estimation value according to the first uplink reference signal, and obtaining a downlink channel estimation value according to the second uplink reference signal and the uplink channel estimation value.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: October 16, 2018
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chia-Lung Liu, Dong-Shing Wu
  • Publication number: 20180295593
    Abstract: A communication system, a base station, a user equipment (UE), and a timing synchronization method for the base station thereof are provided. The communication system includes a first base station, a second base station and the user equipment. The UE is located within coverage of the first base station and the second base station. The first base station and the second base station respectively measure signal stability of the user equipment so that the second base station selects the user equipment based on the measurements for the stability of the signals. The first base station computes a first timing error for transmitting or receiving message between the first base station and the user equipment then transmits the first timing error to the second base station. The second base station adjusts a timing difference between the first base station and the second base station through the first timing error.
    Type: Application
    Filed: June 13, 2018
    Publication date: October 11, 2018
    Applicant: Industrial Technology Research Institute
    Inventors: Chung-Lai Lee, Chia-Lung Liu
  • Patent number: 10039069
    Abstract: A communication system, a base station, a user equipment (UE), and a timing synchronization method for the base station thereof are provided. The communication system includes a first base station, a second base station and the user equipment. The UE is located within coverage of the first base station and the second base station. The first base station and the second base station respectively measure signal stability of the user equipment so that the second base station selects the user equipment based on the measurements for the stability of the signals. The first base station computes a first timing error for transmitting or receiving message between the first base station and the user equipment then transmits the first timing error to the second base station. The second base station adjusts a timing difference between the first base station and the second base station through the first timing error.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: July 31, 2018
    Assignee: Industrial Technology Research Institute
    Inventors: Chung-Lai Lee, Chia-Lung Liu
  • Publication number: 20180176042
    Abstract: A method for transmitting channel information, adapted to a base station, includes steps of: receiving a first uplink reference signal and a second uplink reference signal from a user device, obtaining an uplink channel estimation value according to the first uplink reference signal, and obtaining a downlink channel estimation value according to the second uplink reference signal and the uplink channel estimation value.
    Type: Application
    Filed: December 19, 2016
    Publication date: June 21, 2018
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chia-Lung LIU, Dong-Shing WU
  • Patent number: 9967804
    Abstract: A base station and a method that reduce abnormal cell re-selection behaviors.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: May 8, 2018
    Assignee: Industrial Technology Research Institute
    Inventors: Chia-Lung Liu, Mu-Liang Wang, Guan-Hsien Du
  • Publication number: 20170264484
    Abstract: The disclosure is directed to a method of accessing a radio network, a server and a base station of a radio access network, and a non-transitory computer-readable storage medium thereof. In an embodiment, the method includes the following steps: initializing one or more base stations, transmitting the information of a control function to the server, transmitting commands with control parameter configuration to the one or more base stations. The one or more base stations separate the control function and data function for communication protocols.
    Type: Application
    Filed: November 8, 2016
    Publication date: September 14, 2017
    Applicant: Industrial Technology Research Institute
    Inventors: Chia-Lung Liu, Fu-Te Hsu
  • Publication number: 20170118731
    Abstract: A communication system, a base station, a user equipment (UE), and a timing synchronization method for the base station thereof are provided. The communication system includes a first base station, a second base station and the user equipment. The UE is located within coverage of the first base station and the second base station. The first base station and the second base station respectively measure signal stability of the user equipment so that the second base station selects the user equipment based on the measurements for the stability of the signals. The first base station computes a first timing error for transmitting or receiving message between the first base station and the user equipment then transmits the first timing error to the second base station. The second base station adjusts a timing difference between the first base station and the second base station through the first timing error.
    Type: Application
    Filed: December 9, 2015
    Publication date: April 27, 2017
    Inventors: Chung-Lai Lee, Chia-Lung Liu
  • Publication number: 20170104572
    Abstract: A method for interference mitigation, a network server, and a base station are provided. The method for interference mitigation includes the following steps. A transmitting group is created by grouping a first base station and a first user equipment, the transmitting group including multiple transmitting antennas. A receiving group is created by grouping a second base station and a second user equipment, the receiving group comprising multiple receiving antennas. Channel information between each transmitting antenna and each receiving antenna is obtained to calculate multiple interference coefficients between each transmitting antenna and each receiving antenna. Precoding is performed on the transmitting antennas according to the interference coefficients.
    Type: Application
    Filed: December 28, 2015
    Publication date: April 13, 2017
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chia-Lung LIU, Guan-Hsien DU, Fu-Te HSU
  • Patent number: 9532297
    Abstract: A software defined network (SDN) and a corresponding mobility management method and a corresponding controller are provided. The SDN includes a controller, a plurality of switches and a plurality of edge devices. The controller manages a topology and routing actions of the SDN. When a user equipment (UE) attaches to a target edge device in the edge devices, the target edge device transmits a notification message to the controller. The controller updates flow entries in the switches and the edge devices according to the notification message.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: December 27, 2016
    Assignee: Industrial Technology Research Institute
    Inventors: Kuei-Li Huang, Chai-Hien Gan, Chia-Lung Liu
  • Patent number: 9414393
    Abstract: A base station and a resource allocation method are provided. The method includes: calculating transmission rates of user equipment (UE) on unallocated resource blocks; finding consecutive resource block (RB) sets within the unallocated resource blocks according to a predetermined window size; finding minimum transmission rates of the UE among the transmission rates respectively corresponding to the consecutive RB sets; finding a largest value and a second largest value corresponding to each of the consecutive RB sets among the minimum transmission rates corresponding to the UE; calculating absolute difference values between the largest value and the second largest value corresponding to each of the consecutive RB sets; finding a maximum absolute difference value from the absolute difference values corresponding to the consecutive RB sets; and allocating the consecutive RB set corresponding to the maximum absolute difference value to the specific UE.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: August 9, 2016
    Assignee: Industrial Technology Research Institute
    Inventors: Chia-Lung Liu, Hsi-Lu Chao, Lung-Han Hsu, Chia-Kai Chang
  • Patent number: 9357453
    Abstract: A home base station and method for supporting a plurality of cells under carrier aggregation. The home base station includes a preamble generator and a preamble monitor. The preamble generator allocates respective random access resources in the cells for handover to be carried out by a user equipment (UE), and upon receiving a handover request signal transmitted by a Mobility Management Entity (MME), generates a specific preamble and its transmission time, so that the UE performs random access on the cells based on the preamble and the transmission time to obtain the random access resources and sends out a Random Access Preamble (RAP). The preamble monitor enables the cells to simultaneously monitor the RAP sent by the UE, and when one of the cells receiving the RAP, identifies the cell on which the UE camps based on which one of the cells that has the RAP.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: May 31, 2016
    Assignee: Industrial Technology Research Institute
    Inventors: Chia-Lung Liu, Kuei-Li Huang, Ching-Hsu Chang