Patents by Inventor Timothy Yao

Timothy Yao 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: 12224757
    Abstract: A method and apparatus for reducing jitter in a phase-locked loop (PLL). Clock signals provided to the PLL are resampled into the voltage domain of the VCO in the PLL rather than being merely level shifted into that voltage domain or input directly from digital domain clock dividers as in the prior art. The resampling is done with flip-flops in the analog domain using a faster synchronous clock in each case, and results in cleaner clock edges being presented to the PLL than those provided by the digital circuitry alone. A divided input clock signal is resampled using the undivided input clock, while a divided feedback clock signal is resampled using the feedback clock signal itself, i.e., the output of the VCO in the PLL. This removes jitter caused by the processing of clock signals in the digital voltage domain and thus reduces the jitter in the output signal.
    Type: Grant
    Filed: March 6, 2023
    Date of Patent: February 11, 2025
    Assignee: ESS Technology, Inc.
    Inventors: Dustin Dale Forman, Libin Timothy George, Hassan Mohammadnavazi, Hu Jing Yao
  • Publication number: 20250024398
    Abstract: A method for discerning single registration subscribers and dual registration subscribers, and routes single registration traffic as internal and routes dual registration traffic as external.
    Type: Application
    Filed: September 24, 2024
    Publication date: January 16, 2025
    Applicant: AT&T Intellectual Property I, L.P.
    Inventor: Timothy Yao
  • Patent number: 12185220
    Abstract: The disclosed technology is directed towards routing, by a mobile network operator, a message to a messaging hub associated with a partner carrier or to the partner carrier itself. In response to receiving a message to reroute, a data store (e.g., an ENUM database) is queried to attempt to obtain information corresponding to the routing. For example, when the query response includes a regular expression that specifies a domain, the domain is evaluated against a data structure of respective messaging hubs associated with respective domains. If the returned domain is matched such that an associated messaging hub is identified, the message is routed to the identified messaging hub; otherwise a mobile network partner carrier is determined based on the telephone number of the message recipient, and the message is routed to the determined partner carrier.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: December 31, 2024
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventor: Timothy Yao
  • Publication number: 20240388562
    Abstract: Aspects of the subject disclosure may include, for example, identifying, at an originating network, a recipient of a message at a terminating network, communicating a query message from the originating network to a domain name service, the query message including a query message service identifier for an inter-partner messaging service, receiving, at the originating network, a response message, the response message including a response message service identifier for the inter-partner messaging service, the response message including addressing information for communicating the message to the terminating network, formatting the message, and transmitting the message from the originating network to the terminating network based on the addressing information. Other embodiments are disclosed.
    Type: Application
    Filed: January 9, 2024
    Publication date: November 21, 2024
    Applicant: AT&T Intellectual Property I, L.P.
    Inventor: Timothy Yao
  • Patent number: 12127149
    Abstract: A method for discerning single registration subscribers and dual registration subscribers, and routes single registration traffic as internal and routes dual registration traffic as external.
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: October 22, 2024
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Timothy Yao
  • Patent number: 11658969
    Abstract: Aspects of the subject disclosure may include, for example, receiving, by a processing system including a processor that is operative in a first communication network, a certificate from a communication device that is operative in a second communication network, extracting, by the processing system, an identifier of the communication device from the certificate, authenticating, by the processing system, the communication device in accordance with the identifier, comparing, by the processing system, the identifier with a plurality of identifiers to determine that the communication device is authorized to access data, resulting in an authorization determination, and transmitting, by the processing system, the data to the communication device based on the authorization determination. Other embodiments are disclosed.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: May 23, 2023
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Timothy Yao, Christopher Bryant, Qun Wei
  • Publication number: 20230144632
    Abstract: The disclosed technology is directed towards routing, by a mobile network operator, a message to a messaging hub associated with a partner carrier or to the partner carrier itself. In response to receiving a message to reroute, a data store (e.g., an ENUM database) is queried to attempt to obtain information corresponding to the routing. For example, when the query response includes a regular expression that specifies a domain, the domain is evaluated against a data structure of respective messaging hubs associated with respective domains. If the returned domain is matched such that an associated messaging hub is identified, the message is routed to the identified messaging hub; otherwise a mobile network partner carrier is determined based on the telephone number of the message recipient, and the message is routed to the determined partner carrier.
    Type: Application
    Filed: November 9, 2021
    Publication date: May 11, 2023
    Inventor: Timothy Yao
  • Publication number: 20230117615
    Abstract: A method for discerning single registration subscribers and dual registration subscribers, and routes single registration traffic as internal and routes dual registration traffic as external.
    Type: Application
    Filed: October 19, 2021
    Publication date: April 20, 2023
    Inventor: Timothy Yao
  • Patent number: 11399046
    Abstract: A device includes a processor and a memory. The processor effectuates operations including receiving a service capability for a mobile originating (MO) device. The processor further effectuates operations including receiving a service capability for a mobile terminating (MT) device. The processor further effectuates operations including receiving session initiation protocol (SIP) messages from the MO device at a Breakout Gateway Control Function (BGCF). The processor further effectuates operations including determining whether the received SIP messages are associated with setting up an outgoing open group chat (OGC) or an outgoing Message Session Relay Protocol (MSRP) file transfer. The processor further effectuates operations including blocking the SIP messages in response to the determination that the SIP messages are associated with setting up a MSRP file transfer.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: July 26, 2022
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventor: Timothy Yao
  • Publication number: 20220166772
    Abstract: Aspects of the subject disclosure may include, for example, receiving, by a processing system including a processor that is operative in a first communication network, a certificate from a communication device that is operative in a second communication network, extracting, by the processing system, an identifier of the communication device from the certificate, authenticating, by the processing system, the communication device in accordance with the identifier, comparing, by the processing system, the identifier with a plurality of identifiers to determine that the communication device is authorized to access data, resulting in an authorization determination, and transmitting, by the processing system, the data to the communication device based on the authorization determination. Other embodiments are disclosed.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Timothy Yao, Christopher Bryant, Qun Wei
  • Publication number: 20220141260
    Abstract: A device includes a processor and a memory. The processor effectuates operations including receiving a service capability for a mobile originating (MO) device. The processor further effectuates operations including receiving a service capability for a mobile terminating (MT) device. The processor further effectuates operations including receiving session initiation protocol (SIP) messages from the MO device at a Breakout Gateway Control Function (BGCF). The processor further effectuates operations including determining whether the received SIP messages are associated with setting up an outgoing open group chat (OGC) or an outgoing Message Session Relay Protocol (MSRP) file transfer. The processor further effectuates operations including blocking the SIP messages in response to the determination that the SIP messages are associated with setting up a MSRP file transfer.
    Type: Application
    Filed: June 15, 2020
    Publication date: May 5, 2022
    Inventor: Timothy Yao