Patents by Inventor Shu-Tsz Liu

Shu-Tsz 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: 20190149624
    Abstract: An LPWAN system and positioning method thereof are provided. An LPWAN system includes an application server and an end device. The application server receives a positioning request from the end device and transmits a positioning initial information to a plurality of network devices. Signal measurements are made between the end device and the network devices for deciding a plurality of path loss information. The application server determines an end position of the end device according to the path loss information and a plurality of network positions of the network devices.
    Type: Application
    Filed: December 5, 2017
    Publication date: May 16, 2019
    Inventors: Shu-Han Liao, Shu-Tsz Liu, Hong-Hai Hsu, Yi-Hsueh Tsai
  • Patent number: 10104669
    Abstract: The invention relates to a user equipment of device-to-device communications and a resource selection method thereof. The user equipment includes a resource selection device and a transceiver device. The resource selection device is configured to create a state machine model, which includes an in-coverage state and an out-of-coverage state corresponding to a base station. The resource selection device is also configured to select a corresponding device-to-device communication resource in response to a current state of the user equipment during transferring of the user equipment from the in-coverage state to the out-of-coverage state or from the out-of-coverage state to the in-coverage state. The transceiver device is configured to perform a device-to-device communication with another user equipment according to the corresponding device-to-device communication resource. The resource selection method includes the steps corresponding to the operations of the user equipment.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: October 16, 2018
    Assignee: Institute For Information Industry
    Inventors: Shu-Tsz Liu, Yi-Ting Lin, Yi-Hsueh Tsai, Chun-Che Chien
  • Patent number: 9974036
    Abstract: A direct communication network system and a signal synchronization method thereof are provided. The direct communication network system includes a first direct communication apparatus and a second direct communication apparatus. The first direct communication apparatus synchronizes with a base station within communication coverage of the base station. The second direct communication apparatus synchronizes with the first direct communication apparatus outside the communication coverage of the base station according to at least one first synchronization signal of the first direct communication apparatus. The first direct communication apparatus determines an abnormal synchronization status with the base station, and adjusts a transmitting status of the at least one first synchronization signal.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: May 15, 2018
    Assignee: Institute For Information Industry
    Inventors: Chun-Che Chien, Shu-Tsz Liu
  • Publication number: 20180049265
    Abstract: Embodiments of the present invention relate to a communication system in support of multi-connectivity and a connecting method thereof. In the embodiments, the communication system includes a core network, a master base station, a secondary base station, and a user equipment, wherein the master base station and the secondary base station belong to different wireless communication systems. The secondary base station includes a secondary base station centralized unit and at least one secondary base station distributed unit. The master base station coordinates, with the secondary base station centralized unit, how the user equipment connects with the at least one secondary base station distributed unit, according to a measurement report provided by the user equipment. Therefore, the user equipment connects with not only the master base station but also the at least one secondary base station distributed unit at the same time to support multi-connectivity.
    Type: Application
    Filed: August 11, 2017
    Publication date: February 15, 2018
    Inventors: Shu-Tsz LIU, Feng-Ming Yang, Yi-Hsueh TSAI
  • Patent number: 9854514
    Abstract: A user equipment, a small cell and an operation method thereof are provided. The small cell includes a processor and a transceiver. The processor is configured to generate a maintaining downlink signal when the small cell is in an off-state. The maintaining downlink signal utilizes fewer radio resources compared to a normal downlink signal which is generated when the small cell is in an on-state. The transceiver is electrically connected to the processor and configured to continuously transmit the maintaining downlink signal when the small cell is in the off-state and receive an uplink signal from the user equipment. The processor further switches the small cell from the off-state to the on-state according to the uplink signal.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: December 26, 2017
    Assignee: Institute For Information Industry
    Inventors: Hsuan-Li Lin, Tsung-Yu Tsai, Chun-Che Chien, Shu-Tsz Liu, Yi-Hsueh Tsai
  • Patent number: 9756676
    Abstract: A base station and a device to device (D2D) user equipment (UE), a transmission method, a report method and a resource adjustment method for a wireless communication system are provided. When the D2D UE operates as a transmitting end, it is able to determine a transmission mode according to a transmission condition (e.g., whether a radio link failure or a collision occurs when a D2D transmission is being performed, or whether the telecommunication operators of the transmitting end and the corresponding receiving end are the same). When the D2D UE operates as a receiving end, it is able to transmit a report message carrying received signal quality to the base station after receiving D2D data. Accordingly, the base station is able to adjust a D2D resource configuration according to the report message.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: September 5, 2017
    Assignee: Institute For Information Industry
    Inventors: Shu-Tsz Liu, Chun-Che Chien, Hsien-Tsung Hsu
  • Patent number: 9585154
    Abstract: A direct communication network system for resource synchronization communication is provided. The direct communication network system includes a base station and a first user equipment. The base station broadcasts a pre-authorized setting. The first user equipment receives the pre-authorized setting and listens to a first resource synchronization message broadcasted from the base station according to the pre-authorized setting. The first user equipment directly communicates with a second user equipment according to the first resource synchronization message.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: February 28, 2017
    Assignee: Institute For Information Industry
    Inventors: Jian-Ya Chu, Yi-Hsueh Tsai, Chun-Che Chien, Hsuan-Li Lin, Shu-Tsz Liu
  • Patent number: 9554410
    Abstract: A device to device (D2D) user equipment (UE) used for a wireless communication system is provided. The D2D UE is located in a network topology including a plurality of transmitting ends and a plurality of receiving ends. The D2D UE may be a transmitting end or a receiving end. The receiving ends perform a resource scheduling procedure several times according to transmitting end sequences echoed from the transmitting ends to schedule the appropriate resources for the transmitting ends so as to prevent a transmission collision.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: January 24, 2017
    Assignee: Institute For Information Industry
    Inventors: Tsung-Yu Tsai, Hsuan-Li Lin, Shu-Tsz Liu
  • Patent number: 9456404
    Abstract: A wireless communication system and a resource allocation method thereof are provided. The wireless communication system includes a base station and a plurality of user equipments. The base station or one of the user equipments is configured to transmit resource allocation information to the user equipments. The user equipments are configured to perform a device-to-device communication and/or perform a device-to-device discovery according to the resource allocation information. The resource allocation method is applied to the wireless communication system to perform the aforesaid operations.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: September 27, 2016
    Assignee: Institute For Information Industry
    Inventors: Shu-Tsz Liu, Tsung-Yu Tsai, Hsuan-Li Lin
  • Publication number: 20160156453
    Abstract: A wireless communication system and method including co-time co-frequency full duplex (CCFD) communications are provided. The wireless communication system includes at least one user equipment and a communication device coupled with the at least one user equipment. The at least one user equipment is configured to provide at least one CCFD) measurement report. The communication device is configured to assign one of a symmetric CCFD communication mode, an asymmetric CCFD communication mode and a non-CCFD communication mode to each of the at least one user equipment. The wireless communication method includes the steps corresponding to the operations of the wireless communication system.
    Type: Application
    Filed: November 26, 2015
    Publication date: June 2, 2016
    Inventors: Chun-Che CHIEN, Shu-Tsz LIU
  • Publication number: 20160135168
    Abstract: The invention relates to a user equipment of device-to-device communications and a resource selection method thereof. The user equipment includes a resource selection device and a transceiver device. The resource selection device is configured to create a state machine model, which includes an in-coverage state and an out-of-coverage state corresponding to a base station. The resource selection device is also configured to select a corresponding device-to-device communication resource in response to a current state of the user equipment during transferring of the user equipment from the in-coverage state to the out-of-coverage state or from the out-of-coverage state to the in-coverage state. The transceiver device is configured to perform a device-to-device communication with another user equipment according to the corresponding device-to-device communication resource. The resource selection method includes the steps corresponding to the operations of the user equipment.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 12, 2016
    Inventors: Shu-Tsz LIU, Yi-Ting LIN, Yi-Hsueh TSAI, Chun-Che CHIEN
  • Publication number: 20160128013
    Abstract: A direct communication network system and a signal synchronization method thereof are provided. The direct communication network system includes a first direct communication apparatus and a second direct communication apparatus. The first direct communication apparatus synchronizes with a base station within communication coverage of the base station. The second direct communication apparatus synchronizes with the first direct communication apparatus outside the communication coverage of the base station according to at least one first synchronization signal of the first direct communication apparatus. The first direct communication apparatus determines an abnormal synchronization status with the base station, and adjusts a transmitting status of the at least one first synchronization signal.
    Type: Application
    Filed: November 4, 2015
    Publication date: May 5, 2016
    Inventors: Chun-Che CHIEN, Shu-Tsz LIU
  • Patent number: 9319827
    Abstract: A user equipment and a device-to-device communication selection method thereof are provided. The user equipment is configured to receive device-to-device communication information and discover device-to-device communication nodes. The user equipment is further configured to determine at least one selection procedure from a plurality of selection procedures according to the device-to-device communication information and select at least one first device-to-device communication target from the discovered device-to-device communication node(s) according to the determined selection procedure(s). The device-to-device communication selection method is for use in the user equipment to execute the aforesaid operations.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: April 19, 2016
    Assignee: Institute For Information Industry
    Inventors: Shu-Tsz Liu, Tsung-Yu Tsai, Hsuan-Li Lin
  • Publication number: 20150327314
    Abstract: A base station and a device to device (D2D) user equipment (UE), a transmission method, a report method and a resource adjustment method for a wireless communication system are provided. When the D2D UE operates as a transmitting end, it is able to determine a transmission mode according to a transmission condition (e.g., whether a radio link failure or a collision occurs when a D2D transmission is being performed, or whether the telecommunication operators of the transmitting end and the corresponding receiving end are the same). When the D2D UE operates as a receiving end, it is able to transmit a report message carrying received signal quality to the base station after receiving D2D data. Accordingly, the base station is able to adjust a D2D resource configuration according to the report message.
    Type: Application
    Filed: May 7, 2015
    Publication date: November 12, 2015
    Inventors: Shu-Tsz LIU, Chun-Che CHIEN, Hsien-Tsung HSU
  • Publication number: 20150296504
    Abstract: A direct communication network system for resource synchronization communication is provided. The direct communication network system includes a base station and a first user equipment. The base station broadcasts a pre-authorized setting. The first user equipment receives the pre-authorized setting and listens to a first resource synchronization message broadcasted from the base station according to the pre-authorized setting. The first user equipment directly communicates with a second user equipment according to the first resource synchronization message.
    Type: Application
    Filed: April 14, 2015
    Publication date: October 15, 2015
    Inventors: Jian-Ya CHU, Yi-Hsueh TSAI, Chun-Che CHIEN, Hsuan-Li LIN, Shu-Tsz LIU
  • Publication number: 20150264716
    Abstract: A device to device (D2D) user equipment (UE) used for a wireless communication system is provided. The D2D UE is located in a network topology including a plurality of transmitting ends and a plurality of receiving ends. The D2D UE may be a transmitting end or a receiving end. The receiving ends perform a resource scheduling procedure several times according to transmitting end sequences echoed from the transmitting ends to schedule the appropriate resources for the transmitting ends so as to prevent a transmission collision.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 17, 2015
    Inventors: Tsung-Yu TSAI, Hsuan-Li LIN, Shu-Tsz LIU
  • Patent number: 9036533
    Abstract: A wireless communication system is disclosed. The wireless communication system comprises a core network, a base station and a relay station. The relay station transmits a first message with a system resource information of the relay station to the base station. The base station generates a configuration pattern according to the system resource information of the relay station, and transmits a second message with the configuration pattern to the relay station. The configuration pattern is used to divide the radio resource unit of the wireless communication system into a first set and a second set. Therefore, the base station transmits a first signal to the relay station through the first set, and the relay station transfers a second signal with a user equipment through the second set.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: May 19, 2015
    Assignee: Acer Incorporated
    Inventors: Shu-Tsz Liu, Kanchei Loa
  • Publication number: 20150094077
    Abstract: A user equipment, a small cell and an operation method thereof are provided. The small cell includes a processor and a transceiver. The processor is configured to generate a maintaining downlink signal when the small cell is in an off-state. The maintaining downlink signal utilizes fewer radio resources compared to a normal downlink signal which is generated when the small cell is in an on-state. The transceiver is electrically connected to the processor and configured to continuously transmit the maintaining downlink signal when the small cell is in the off-state and receive an uplink signal from the user equipment. The processor further switches the small cell from the off-state to the on-state according to the uplink signal.
    Type: Application
    Filed: September 23, 2014
    Publication date: April 2, 2015
    Inventors: Hsuan-Li LIN, Tsung-Yu TSAI, Chun-Che CHIEN, Shu-Tsz LIU, Yi-Hsueh TSAI
  • Patent number: 8971466
    Abstract: A receiver with Inphase-Quadrature (I-Q) imbalance compensation and an I-Q imbalance compensation method thereof are provided. The receiver chooses a first receiving signal which includes a first data and a first noise, as well as a second receiving signal which includes a second data and a second noise from a plurality of receiving signals. The first data have a first positive frequency data and a first negative frequency data, while the second data have a second positive frequency data and a second negative frequency data. The receiver calculates an I-Q imbalance compensation parameter according to the first receiving signal and the second receiving signal, and compensates for a third receiving signal according to the I-Q imbalance compensation parameter. The I-Q imbalance compensation method is applied to the receiver to implement the aforesaid operations.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: March 3, 2015
    Assignee: Institute for Information Industry
    Inventors: Tsung-Yu Tsai, Chun-Che Chien, Shu-Tsz Liu, You-Hsien Lin, Terng-Yin Hsu, Wei-Chi Lai, Shao-Ying Yeh
  • Publication number: 20150045018
    Abstract: A wireless communication system and a resource allocation method thereof are provided. The wireless communication system includes a base station and a plurality of user equipments. The base station or one of the user equipments is configured to transmit resource allocation information to the user equipments. The user equipments are configured to perform a device-to-device communication and/or perform a device-to-device discovery according to the resource allocation information. The resource allocation method is applied to the wireless communication system to perform the aforesaid operations.
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Inventors: Shu-Tsz LIU, Tsung-Yu TSAI, Hsuan-Li LIN