Patents by Inventor Echo Wang

Echo Wang 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).

  • In-call handoff between cellular and packet switched networks
    Patent number: 9307466
    Abstract: A telecommunications device is operable to perform in-call handoff between a cellular network and a packet-switched network. The telecommunications device includes interfaces connecting the telecommunications device with a circuit-switched network and a packet-switched network. The telecommunications device is operable to receive a request from a multi-mode device to handoff an existing call over a cellular network to the packet-switched network. The existing call is between the multi-mode device and a remote party and was established without the telecommunications device. In response to receiving the request, the telecommunications device establishes a first call leg in the packet-switched network with the multi-mode device. The multi-mode device sends a transfer signal to a call server in the cellular network requesting the transfer of the on-going voice session from itself to the telecommunication device. A second call leg is setup between the telecommunication device and a remote party.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 5, 2016
    Assignee: Google Technology Holdings LLC
    Inventors: X.M. Li, D.F. Jiang, Echo Wang
  • In-Call Handoff Between Cellular and Packet Switched Networks
    Publication number: 20090111471
    Abstract: A telecommunications device is operable to perform in-call handoff between a cellular network and a packet-switched network. The telecommunications device includes interfaces connecting the telecommunications device with a circuit-switched network and a packet-switched network. The telecommunications device is operable to receive a request from a multi-mode device to handoff an existing call over a cellular network to the packet-switched network. The existing call is between the multi-mode device and a remote party and was established without the telecommunications device. In response to receiving the request, the telecommunications device establishes a first call leg in the packet-switched network with the multi-mode device. The multi-mode device sends a transfer signal to a call server in the cellular network requesting the transfer of the on-going voice session from itself to the telecommunication device. A second call leg is setup between the telecommunication device and a remote party.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Applicant: General Instrument Corporation
    Inventors: X.M. Li, D.F. Jiang, Echo Wang