Patents by Inventor Shiwei Zhao
Shiwei Zhao 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: 11042349Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the second electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may transmit information to the second electronic device specifying the corrected future time.Type: GrantFiled: April 8, 2019Date of Patent: June 22, 2021Assignee: B&W Group Ltd.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Patent number: 10846048Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and the electronic device may perform the playback operation at the corrected future time.Type: GrantFiled: February 3, 2019Date of Patent: November 24, 2020Assignee: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Patent number: 10638509Abstract: In order to maintain performance during wireless communication, a transmitting electronic device may selectively enable use of pre-authorization messages during communication with one or more receiving electronic devices. In particular, the transmitting electronic device may monitor a performance metric associated with the communication. If the performance metric is less than a threshold, the transmitting electronic device may selectively enable the use of the pre-authorization messages before communicating data to the one of the receiving electronic devices. Subsequently, the transmitting electronic device monitors a pre-authorization performance metric associated with the communication of the pre-authorization messages. If the pre-authorization performance metric is less than a pre-authorization threshold, the transmitting electronic device may selectively disable the use of the pre-authorization messages.Type: GrantFiled: March 19, 2018Date of Patent: April 28, 2020Assignee: ARRIS Enterprises LLCInventor: Shiwei Zhao
-
Patent number: 10509625Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.Type: GrantFiled: May 18, 2019Date of Patent: December 17, 2019Assignee: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20190272146Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.Type: ApplicationFiled: May 18, 2019Publication date: September 5, 2019Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20190235829Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the second electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may transmit information to the second electronic device specifying the corrected future time.Type: ApplicationFiled: April 8, 2019Publication date: August 1, 2019Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylond Yu
-
Publication number: 20190171412Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and the electronic device may perform the playback operation at the corrected future time.Type: ApplicationFiled: February 3, 2019Publication date: June 6, 2019Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20190174537Abstract: In order to maintain performance during wireless communication, a transmitting electronic device may selectively enable use of pre-authorization messages during communication with one or more receiving electronic devices. In particular, the transmitting electronic device may monitor a performance metric associated with the communication. If the performance metric is less than a threshold, the transmitting electronic device may selectively enable the use of the pre-authorization messages before communicating data to the one of the receiving electronic devices. Subsequently, the transmitting electronic device monitors a pre-authorization performance metric associated with the communication of the pre-authorization messages. If the pre-authorization performance metric is less than a pre-authorization threshold, the transmitting electronic device may selectively disable the use of the pre-authorization messages.Type: ApplicationFiled: March 19, 2018Publication date: June 6, 2019Inventor: Shiwei Zhao
-
Patent number: 10296285Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the second electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may transmit information to the second electronic device specifying the corrected future time.Type: GrantFiled: August 15, 2017Date of Patent: May 21, 2019Assignee: Eva Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Patent number: 10296286Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.Type: GrantFiled: August 15, 2017Date of Patent: May 21, 2019Assignee: Eva Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Patent number: 10255033Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and the electronic device may perform the playback operation at the corrected future time.Type: GrantFiled: August 15, 2017Date of Patent: April 9, 2019Assignee: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Patent number: 10120642Abstract: A processor in an electronic device may coordinate an interface clock in the electronic device with a second interface clock in a second electronic device based on time-coordination information received in packets from the second electronic device. Then, the processor captures timing information associated with the interface clock provided by an interface clock circuit to increase a resolution of a system clock. Moreover, the processor may track, using the timing information, relative drift as a function of time between the system clock and the interface clock, and may determine, based on the relative drift, an estimated time offset between the interface clock and the system clock at the future time. Next, the processor modifies a future time when the electronic device is to perform the playback operation based on the estimated time offset to determine a corrected future time, and may perform the playback operation at the corrected future time.Type: GrantFiled: August 15, 2017Date of Patent: November 6, 2018Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Patent number: 10120641Abstract: A processor in an electronic device maintains coordination between a system clock provided by a system clock circuit and an interface clock provided by a clock circuit. Then, the processor may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between the interface clock and a second interface clock in the second electronic device. Moreover, the processor adjusts, based on the relative drift, the system clock circuit to eliminate the relative drift. Next, the processor may determine a remaining time offset between the interface clock and the second interface clock. Furthermore, the processor modifies a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may perform the playback operation at the corrected future time.Type: GrantFiled: August 15, 2017Date of Patent: November 6, 2018Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20180167647Abstract: A processor in an electronic device may coordinate an interface clock in the electronic device with a second interface clock in a second electronic device based on time-coordination information received in packets from the second electronic device. Then, the processor captures timing information associated with the interface clock provided by an interface clock circuit to increase a resolution of a system clock. Moreover, the processor may track, using the timing information, relative drift as a function of time between the system clock and the interface clock, and may determine, based on the relative drift, an estimated time offset between the interface clock and the system clock at the future time. Next, the processor modifies a future time when the electronic device is to perform the playback operation based on the estimated time offset to determine a corrected future time, and may perform the playback operation at the corrected future time.Type: ApplicationFiled: August 15, 2017Publication date: June 14, 2018Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20180165056Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and the electronic device may perform the playback operation at the corrected future time.Type: ApplicationFiled: August 15, 2017Publication date: June 14, 2018Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20180167192Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.Type: ApplicationFiled: August 15, 2017Publication date: June 14, 2018Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20180165057Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the second electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may transmit information to the second electronic device specifying the corrected future time.Type: ApplicationFiled: August 15, 2017Publication date: June 14, 2018Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Publication number: 20180167646Abstract: A processor in an electronic device maintains coordination between a system clock provided by a system clock circuit and an interface clock provided by a clock circuit. Then, the processor may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between the interface clock and a second interface clock in the second electronic device. Moreover, the processor adjusts, based on the relative drift, the system clock circuit to eliminate the relative drift. Next, the processor may determine a remaining time offset between the interface clock and the second interface clock. Furthermore, the processor modifies a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may perform the playback operation at the corrected future time.Type: ApplicationFiled: August 15, 2017Publication date: June 14, 2018Applicant: EVA Automation, Inc.Inventors: Leo Lay, Adrian Harold Chadd, Haisong Wang, Shiwei Zhao, Li Li, Gaylord Yu
-
Patent number: 9949291Abstract: In order to maintain performance during wireless communication, a transmitting electronic device may selectively enable use of pre-authorization messages during communication with one or more receiving electronic devices. In particular, the transmitting electronic device may monitor a performance metric associated with the communication. If the performance metric is less than a threshold, the transmitting electronic device may selectively enable the use of the pre-authorization messages before communicating data to the one of the receiving electronic devices. Subsequently, the transmitting electronic device monitors a pre-authorization performance metric associated with the communication of the pre-authorization messages. If the pre-authorization performance metric is less than a pre-authorization threshold, the transmitting electronic device may selectively disable the use of the pre-authorization messages.Type: GrantFiled: May 15, 2014Date of Patent: April 17, 2018Assignee: Ruckus Wireless, Inc.Inventor: Shiwei Zhao
-
Patent number: 9854533Abstract: System and method for improving channel efficiency in a wireless link between an access-point transceiver and a first transceiver. The first transceiver may have a first data throughput rate that is lower than the maximum possible data throughput rate of the wireless link. The first transceiver may include a first receive buffer. An indication of the first data throughput rate and a size of the first receive buffer may be received and stored by the access-point transceiver. A first size of a first data packet for transmission to the first transceiver may be determined by the access-point transceiver based on one or more of the first data throughput rate and/or the size of the first receive buffer. The first data packet of the first size may be transmitted to the first transceiver by the access-point transceiver at a data rate that is higher than the first data throughput rate.Type: GrantFiled: January 1, 2015Date of Patent: December 26, 2017Assignee: QUALCOMM IncorporatedInventors: James Simon Cho, Shiwei Zhao