Patents by Inventor Hsien-Chang Liu
Hsien-Chang 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).
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Patent number: 9264967Abstract: A method is disclosed, operating a mobile station in a wireless network system comprising a plurality of base stations allocated in N channels. A Data packet is transmitted at a time interval p to a first base station of the wireless network system to which the mobile station is currently connected. Each of a plurality of partial scan sections is performed at the interval of every M data packets to monitor messages from the base stations of the N channels.Type: GrantFiled: May 28, 2013Date of Patent: February 16, 2016Assignee: MEDIATEK INC.Inventors: Hong-Kai Hsu, Hsien-Chang Liu, Yu Hsiang Lin
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Patent number: 8838104Abstract: A mobile station operating in a wireless network system comprising a plurality of base stations is disclosed. A communication unit receives the messages from a first base station of the wireless network system to which the mobile station is currently connected. A signal detection unit detects a first averaged signal strength corresponding to the messages received from the first base station. A processor determines a scan period according to the first averaged signal strength, performing a background scan, at intervals during the scan period, to monitor messages from the plurality of base stations within the wireless network system.Type: GrantFiled: July 9, 2007Date of Patent: September 16, 2014Assignee: Mediatek Inc.Inventors: Hsien-Chang Liu, Hong-Kai Hsu
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Patent number: 8780934Abstract: A method for performing serial transport communication is provided, where the method is utilized for performing communication between a plurality of devices, each of which provides a user with a plurality of wireless communication functions respectively complying with different wireless communication standards. The method includes: with regard to a first wireless communication function of the plurality of wireless communication functions, utilizing a serial transport protocol to perform communication between the plurality of devices through a transport bus; and with regard to a second wireless communication function of the plurality of wireless communication functions, utilizing the serial transport protocol to perform communication between the plurality of devices through the transport bus. An associated device is also provided.Type: GrantFiled: November 1, 2011Date of Patent: July 15, 2014Assignee: Mediatek Inc.Inventors: Wei-Lun Wan, Hsien-Chang Liu, Shuo-Jen Hsu, Chia-Hsuan Chuang, Chih-Hsuan Wang, Juei-Ting Sun
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Publication number: 20130265902Abstract: A method is disclosed, operating a mobile station in a wireless network system comprising a plurality of base stations allocated in N channels. A Data packet is transmitted at a time interval p to a first base station of the wireless network system to which the mobile station is currently connected. Each of a plurality of partial scan sections is performed at the interval of every M data packets to monitor messages from the base stations of the N channels.Type: ApplicationFiled: May 28, 2013Publication date: October 10, 2013Inventors: Hong-Kai HSU, Hsien-Chang LIU, Yu Hsiang LIN
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Patent number: 8472373Abstract: A method is disclosed, operating a mobile station in a wireless network system comprising a plurality of base stations allocated in N channels. Data packets are received at a time interval p from a first base station of the wireless network system to which the mobile station is currently connected. A first period T is provided for a complete background scan monitoring messages from the plurality of base stations located in the wireless network system. The complete background scan is divided into a plurality of partial scan sections, each of which monitors base stations of one of the N channels. A second period M is determined for the partial scan section according to the time interval p, the first period T, and the number of channels N.Type: GrantFiled: July 9, 2007Date of Patent: June 25, 2013Assignee: Mediatek Inc.Inventors: Hong-Kai Hsu, Hsien-Chang Liu, Yu Hsiang Lin
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Publication number: 20120287772Abstract: A method for performing serial transport communication is provided, where the method is utilized for performing communication between a plurality of devices, each of which provides a user with a plurality of wireless communication functions respectively complying with different wireless communication standards. The method includes: with regard to a first wireless communication function of the plurality of wireless communication functions, utilizing a serial transport protocol to perform communication between the plurality of devices through a transport bus; and with regard to a second wireless communication function of the plurality of wireless communication functions, utilizing the serial transport protocol to perform communication between the plurality of devices through the transport bus. An associated device is also provided.Type: ApplicationFiled: November 1, 2011Publication date: November 15, 2012Inventors: Wei-Lun Wan, Hsien-Chang Liu, Shuo-Jen Hsu, Chia-Hsuan Chuang, Chih-Hsuan Wang, Juei-Ting Sun
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Publication number: 20110314198Abstract: A wireless peripheral chip operable to connect to a host device is provided. The wireless peripheral chip includes a first wireless communication module providing a first wireless communication service for the host device and a second wireless communication module providing a second wireless communication service for the host device. The first wireless communication module and the second wireless communication module share at least one interrupt signal for communicating with the host device.Type: ApplicationFiled: June 17, 2010Publication date: December 22, 2011Applicant: MEDIATEK INC.Inventors: Hsien-Chang Liu, Yun-Chang Chang
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Patent number: 8082582Abstract: An authorization system of a navigation device includes a first identification (ID) module and a second ID module. The first ID module is arranged to perform authorization for a first portion of the navigation device, and the second ID module is arranged to perform authorization for a second portion of the navigation device. The first and the second ID modules perform bidirectional authorization of the first and the second portions, and further determine behavior of the navigation device according to a result of the bidirectional authorization. An associated authorization method for controlling the navigation device is further provided.Type: GrantFiled: May 21, 2008Date of Patent: December 20, 2011Assignee: Mediatek Inc.Inventors: Shr-Cheng Li, Hsien-Chang Liu, Yun-Chang Chang, An-Bang Chen
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Patent number: 8077086Abstract: A method and apparatus for obtaining Global navigation Satellite System (GNSS) time in a GNSS receiver are provided. The following steps are included: obtaining a time relationship between a first clock signal and the received GNSS time; obtaining a first clock value of a second clock signal and an first associated clock value of the first clock signal at a first time point; calculating a first GNSS time corresponding to the first clock value of the second clock signal according to the first associated clock value and the time relationship; obtaining a second clock value of the second clock signal and an second associated clock value of the first clock signal at a second time point; and calculating a second GNSS time corresponding to the second associated clock value, according to the first GNSS time, the first clock value and the second clock value of the second clock signal.Type: GrantFiled: March 18, 2011Date of Patent: December 13, 2011Assignee: Mediatek Inc.Inventors: Kung-Shuan Huang, Hsien-Chang Liu, An-Bang Chen
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Publication number: 20110163915Abstract: A method and apparatus for obtaining Global navigation Satellite System (GNSS) time in a GNSS receiver are provided. The following steps are included: obtaining a time relationship between a first clock signal and the received GNSS time; obtaining a first clock value of a second clock signal and an first associated clock value of the first clock signal at a first time point; calculating a first GNSS time corresponding to the first clock value of the second clock signal according to the first associated clock value and the time relationship; obtaining a second clock value of the second clock signal and an second associated clock value of the first clock signal at a second time point; and calculating a second GNSS time corresponding to the second associated clock value, according to the first GNSS time, the first clock value and the second clock value of the second clock signal.Type: ApplicationFiled: March 18, 2011Publication date: July 7, 2011Inventors: Kung-Shuan Huang, Hsien-Chang Liu, An-Bang Chen
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Patent number: 7936303Abstract: A method for obtaining GNSS time in a GNSS receiver includes: obtaining a time relationship between a first clock signal and the received GNSS time; obtaining a clock value B1 of a second clock signal and further obtaining an associated clock value A1 of the first clock signal to obtain a first pulse relationship at a first time point; calculating a GNSS time C1 corresponding to the clock value A1 according to the time relationship; obtaining a clock value B2 of the second clock signal and further obtaining an associated clock value A2 of the first clock signal to obtain a second pulse relationship at a second time point; and calculating a GNSS time C2 according to the GNSS time C1, the clock value B1, and the clock value B2. Exemplary values of A1, B1, C1, A2 B2, and C2 can be TTick1, FN1, TOW1, TTick2, FN2, and TOW2, respectively.Type: GrantFiled: December 30, 2008Date of Patent: May 3, 2011Assignee: Mediatek Inc.Inventors: Kung-Shuan Huang, Hsien-Chang Liu, An-Bang Chen
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Publication number: 20110050495Abstract: A method for obtaining GNSS time in a GNSS receiver includes: obtaining a time relationship between a first clock signal and the received GNSS time; obtaining a clock value B1 of a second clock signal and further obtaining an associated clock value A1 of the first clock signal to obtain a first pulse relationship at a first time point; calculating a GNSS time C1 corresponding to the clock value A1 according to the time relationship; obtaining a clock value B2 of the second clock signal and further obtaining an associated clock value A2 of the first clock signal to obtain a second pulse relationship at a second time point; and calculating a GNSS time C2 according to the GNSS time C1, the clock value B1, and the clock value B2. Exemplary values of A1, B1, C1, A2 B2, and C2 can be TTick1, FN1, TOW1, TTick2, FN2, and TOW2, respectively.Type: ApplicationFiled: December 30, 2008Publication date: March 3, 2011Inventors: Kung-Shuan Huang, Hsien-Chang Liu, An-Bang Chen
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Patent number: 7813760Abstract: A method of controlling a communication mechanism utilized to arbitrate transmissions of a first and a second wireless signals and a communication apparatus utilized the method are disclosed. The method includes determining a transmission quality indicator corresponding to one of the first wireless signal and the second wireless signal, and dynamically turning the communication mechanism on or off according to the transmission quality indicator. Therefore, the present invention is able to arbitrate transmissions of different wireless signals while decreasing the occurrence of transmission disconnection resulted from the arbitration.Type: GrantFiled: June 27, 2007Date of Patent: October 12, 2010Assignee: Mediatek Inc.Inventors: Hong-Kai Hsu, Hsien-Chang Liu
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Publication number: 20090293115Abstract: An authorization system of a navigation device includes a first identification (ID) module and a second ID module. The first ID module is arranged to perform authorization for a first portion of the navigation device, and the second ID module is arranged to perform authorization for a second portion of the navigation device. The first and the second ID modules perform bidirectional authorization of the first and the second portions, and further determine behavior of the navigation device according to a result of the bidirectional authorization. An associated authorization method for controlling the navigation device is further provided.Type: ApplicationFiled: May 21, 2008Publication date: November 26, 2009Inventors: Shr-Cheng Li, Hsien-Chang Liu, Yun-Chang Chang, An-Bang Chen
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Publication number: 20090004979Abstract: A method of controlling a communication mechanism utilized to arbitrate transmissions of a first and a second wireless signals and a communication apparatus utilized the method are disclosed. The method includes determining a transmission quality indicator corresponding to one of the first wireless signal and the second wireless signal, and dynamically turning the communication mechanism on or off according to the transmission quality indicator. Therefore, the present invention is able to arbitrate transmissions of different wireless signals while decreasing the occurrence of transmission disconnection resulted from the arbitration.Type: ApplicationFiled: June 27, 2007Publication date: January 1, 2009Inventors: Hong-Kai Hsu, Hsien-Chang Liu
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Publication number: 20080096572Abstract: A method is disclosed, operating a mobile station in a wireless network system comprising a plurality of base stations allocated in N channels. Data packets are received at a time interval p from a first base station of the wireless network system to which the mobile station is currently connected. A first period T is provided for a complete background scan monitoring messages from the plurality of base stations located in the wireless network system. The complete background scan is divided into a plurality of partial scan sections, each of which monitors base stations of one of the N channels. A second period M is determined for the partial scan section according to the time interval p, the first period T, and the number of channels N.Type: ApplicationFiled: July 9, 2007Publication date: April 24, 2008Applicant: MEDIATEK INC.Inventors: Hong-Kai Hsu, Hsien-Chang Liu, Yu Hsiang Lin
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Publication number: 20080096561Abstract: A mobile station operating in a wireless network system comprising a plurality of base stations is disclosed. A communication unit receives the messages from a first base station of the wireless network system to which the mobile station is currently connected. A signal detection unit detects a first averaged signal strength corresponding to the messages received from the first base station. A processor determines a scan period according to the first averaged signal strength, performing a background scan, at intervals during the scan period, to monitor messages from the plurality of base stations within the wireless network system.Type: ApplicationFiled: July 9, 2007Publication date: April 24, 2008Applicant: MEDIATEK INC.Inventors: Hsien-Chang Liu, Hong-Kai Hsu