Patents by Inventor Jumin (Jerry) Liu

Jumin (Jerry) Liu 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: 7342884
    Abstract: Optical transceivers used in data communications equipment are typically bidirectional and require two-way communications in order to maintain their operability. However, in some applications such as cable television, the traffic is highly unbalanced with very high bandwidth requirements in one direction and minimal bandwidth requirements in the opposite direction. Hence for such efficient and cost effective one-way communication applications, unidirectional fiber optic transceivers are useful. There is provided here a unidirectional transceiver provided internally with a keep-alive signal generator to enable unidirectional transmissions. The keep alive signal is, for instance, idle characters for a Gigabit Ethernet communication system, or any other suitable handshake signal which provides the desired operability.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: March 11, 2008
    Assignee: Harmonic, Inc.
    Inventors: LiPing Chen, David Piehler, Adi Bonen, Jumin (Jerry) Liu
  • Publication number: 20030214965
    Abstract: Optical transceivers used in data communications equipment are typically bidirectional and require two-way communications in order to maintain their operability. However, in some applications such as cable television, the traffic is highly unbalanced with very high bandwidth requirements in one direction and minimal bandwidth requirements in the opposite direction. Hence for such efficient and cost effective one-way communication applications, unidirectional fiber optic transceivers are useful. There is provided here a unidirectional transceiver provided internally with a keep-alive signal generator to enable unidirectional transmissions. The keep alive signal is, for instance, idle characters for a Gigabit Ethernet communication system, or any other suitable handshake signal which provides the desired operability.
    Type: Application
    Filed: September 26, 2002
    Publication date: November 20, 2003
    Inventors: LiPing Chen, David Piehler, Adi Bonen, Jumin (Jerry) Liu