Patents by Inventor Yongguang Zhang

Yongguang Zhang 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: 6847633
    Abstract: A method, apparatus, article of manufacture, and a memory structure communicating information, particularly information transferred to and from an Internet host. The apparatus comprises a radio port control unit, comprising a router, and a stub. The router is communicatively coupled to transmit and receive messages with an Internet host and communicatively coupled to a packet forwarding module to accept SU-sourced messages and to provide SU-addressed messages to the packet forwarding module in a first data transfer protocol. The stub is coupled between the router and the packet forwarding module to translate messages from the first data transfer protocol to a second data transfer protocol and to translate messages from the second data transfer protocol to the first data transfer protocol.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: January 25, 2005
    Assignee: The DIRECTV Group, Inc.
    Inventors: Bo Ryu, Yongguang Zhang
  • Patent number: 6741575
    Abstract: A method, apparatus, article of manufacture, and a memory structure for multicasting data in a cellular personal access communication system is disclosed. The method comprises the steps of allocating a multicast packet terminal identifier to a multicast group when a subscriber unit in a cell requests membership in the multicast group, receiving a multicast packet having a global multicast address, determining a cell identifier from a mapping of the global multicast address to at least one local multicast identifier and a cell identifier, and forwarding the multicast packet to the cell according to the cell identifier. The apparatus comprises a radio port controller unit having a packet data control unit coupled to a radio port configured to receive a multicast packet and a packet forwarding module. The packet data control unit includes an allocation module configured to allocate a local multicast identifier to a multicast group when a subscriber unit in a cell requests membership in the multicast group.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: May 25, 2004
    Assignee: Hughes Electronics Corporation
    Inventors: Yongguang Zhang, Bo Ryu, Son K. Dao, Tayyab Khan, Stanley E. Kay, Sivakamar Kailas
  • Publication number: 20030204716
    Abstract: A system for distributing digital content from a content provider to content presenter(s) for presentation. The system includes a provider apparatus that encrypts the content before distribution thereof and sets at least one condition for presenting the content, and a presenter apparatus to which is distributed the encrypted content and which is allowed to decrypt the content when the at least one condition is satisfied. The system allows for secure distribution of multimedia presentations from one source to geographically separate locations. The system provides for secure presentation and cryptographically secure accounting for each presentation.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Inventors: Troy Dean Rockwood, Bong Kyun Ryu, Wensheng Zhou, Yongguang Zhang
  • Patent number: 6301463
    Abstract: A device for implementing a multimedia communication dissemination system is disclosed herein. The communication system integrates heterogeneous satellite transmission systems, local area computer networks, and the public telephone system to implement a flexible, high-speed communication system. The preferred communication dissemination system includes a broadcast server for broadcasting an information signal, a mobile base station for receiving the information signal broadcast from the broadcast server, and a local area network for distributing information received by the mobile base station. The preferred mobile base station includes a receiver for receiving information signals transmitted from a broadcast server, a network interface for distributing processed information signals, and a software proxy process for processing information signals. A software proxy process controls the dissemination of information through the network.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: October 9, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Son K. Dao, Yongguang Zhang, Eddie C. Shek, Asha Vellaikal
  • Publication number: 20010018341
    Abstract: A device for implementing a multimedia communication dissemination system is disclosed herein. The communication system integrates heterogeneous satellite transmission systems, local area computer networks, and the public telephone system to implement a flexible, high-speed communication system. The preferred communication dissemination system includes a broadcast server for broadcasting an information signal, a mobile base station for receiving the information signal broadcast from the broadcast server, and a local area network for distributing information received by the mobile base station. The preferred mobile base station includes a receiver for receiving information signals transmitted from a broadcast server, a network interface for distributing processed information signals, and a software proxy process for processing information signals. A software proxy process controls the dissemination of information through the network.
    Type: Application
    Filed: May 3, 2001
    Publication date: August 30, 2001
    Applicant: Hughes Electronics Corporation
    Inventors: Son K. Dao, Yongguang Zhang, Eddie C. Shek, Asha Vellaikal
  • Patent number: 5915207
    Abstract: A device for implementing a multimedia communication dissemination system is disclosed herein. The communication system integrates heterogeneous satellite transmission systems, local area computer networks, and the public telephone system to implement a flexible, high-speed communication system. The preferred communication dissemination system includes a broadcast server for broadcasting an information signal, a mobile base station for receiving the information signal broadcast from the broadcast server, and a local area network for distributing information received by the mobile base station. The preferred mobile base station includes a receiver for receiving information signals transmitted from a broadcast server, a network interface for distributing processed information signals, and a software proxy process for processing information signals. A software proxy process controls the dissemination of information through the network.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: June 22, 1999
    Assignee: Hughes Electronics Corporation
    Inventors: Son K. Dao, Yongguang Zhang, Eddie C. Shek, Asha Vellaikal