Patents by Inventor Hwan Tang

Hwan Tang 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: 20170041233
    Abstract: A method and a system for controlling the load of calls carried by a voice over Internet protocol telephone system attempts to reduce or eliminate the overloading of individual trunk groups and/or destination gateways. The system obtains information relating to a plurality of calls in the system, and analyzes the call information to determine if certain trunk groups or destination gateways are overloaded. If so, the system issues commands so that additional calls are diverted away from the overloaded trunk group or destination gateway.
    Type: Application
    Filed: September 7, 2016
    Publication date: February 9, 2017
    Inventors: Vitaliy YURCHENKO, Hwan TANG
  • Patent number: 9444738
    Abstract: A method and a system for controlling the load of calls carried by a voice over Internet protocol telephone system attempts to reduce or eliminate the overloading of individual trunk groups and/or destination gateways. The system obtains information relating to a plurality of calls in the system, and analyzes the call information to determine if certain trunk groups or destination gateways are overloaded. If so, the system issues commands so that additional calls are diverted away from the overloaded trunk group or destination gateway.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: September 13, 2016
    Assignee: IBASIS, INC.
    Inventors: Vitaliy Yurchenko, Hwan Tang
  • Patent number: 8351421
    Abstract: A system and method for sending long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. Then system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: January 8, 2013
    Assignee: iBasis, Inc.
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly
  • Patent number: 8248957
    Abstract: A system and method for sending long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. Then system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: August 21, 2012
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly
  • Publication number: 20090238175
    Abstract: A system and method for sending long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. Then system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Application
    Filed: May 4, 2009
    Publication date: September 24, 2009
    Applicant: iBasis, Inc.
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly
  • Publication number: 20090213846
    Abstract: A system and method for sending Long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. Then system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Application
    Filed: May 4, 2009
    Publication date: August 27, 2009
    Applicant: iBasis, Inc.
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly
  • Patent number: 7577131
    Abstract: A system and method for sending long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. The system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: August 18, 2009
    Assignee: Ibasis, Inc.
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly
  • Patent number: 7529225
    Abstract: A system and method for sending long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. Then system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: May 5, 2009
    Assignee: Ibasis, Inc.
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly
  • Publication number: 20090010168
    Abstract: A method and a system for controlling the load of calls carried by a voice over Internet protocol telephone system attempts to reduce or eliminate the overloading of individual trunk groups and/or destination gateways. The system obtains information relating to a plurality of calls in the system, and analyzes the call information to determine if certain trunk groups or destination gateways are overloaded. If so, the system issues commands so that additional calls are diverted away from the overloaded trunk group or destination gateway.
    Type: Application
    Filed: September 17, 2008
    Publication date: January 8, 2009
    Inventors: Vitaliy YURCHENKO, Hwan TANG
  • Publication number: 20040047345
    Abstract: A system and method for sending long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. The system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Application
    Filed: August 25, 2003
    Publication date: March 11, 2004
    Applicant: iBasis, Inc.
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly
  • Publication number: 20030123436
    Abstract: A system and method for sending long distance telephone calls over the Internet utilizes cost and quality of service data to optimize system performance and to minimize the cost of completing the calls. The system utilizes a network of gateways connected to the Internet. The gateways receive calls from various service providers and convert the analog calls into data packets which are then placed onto the Internet. Similarly, the gateways take data packets off the Internet, convert the data packets back into analog format, and provide the analog telephone calls to the same or another service provider. Then system periodically checks the quality of communications between each of the gateways, and uses this information, in combination with cost information, to determine how to route the calls over the Internet. Special addressing protocols can be used by a system embodying the invention to reduce or eliminate unnecessary signaling between gateways as call setup procedures are carried out.
    Type: Application
    Filed: November 18, 2002
    Publication date: July 3, 2003
    Inventors: Ajay Joseph, Hwan Tang, Lizhong Zhang, Paul A. Skelly