Patents by Inventor Zhengjin Shu

Zhengjin Shu 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: 20050154933
    Abstract: A system and method for energy conservation in wireless networks includes techniques for powering down a Soft AP device while still maintaining compliance with the “always on” requirement for access points in wireless networks. The system and method includes a technique for causing a host system having a Soft AP device integrated therein to go into a low power, or energy conservation mode when no wireless activity has occurred over a predetermined period, and for monitoring to identify appropriate signals even while in the low power mode. If an appropriate signal is detected, a wake up signal is generated and the host system, including the Soft AP device, is returned to normal functionality.
    Type: Application
    Filed: July 22, 2004
    Publication date: July 14, 2005
    Inventors: Tseng Hsu, Zhengjin Shu
  • Publication number: 20050078624
    Abstract: A wireless network software access point (AP) integrated into a wireless device allows a wireless network to be configured automatically and dynamically maintained with minimal user intervention. Such automatic configuration includes: whether to configure the Soft AP enabled device to be an AP Node or a Station Node; specifics of wireless radio link configuration, routing or bridging relationships with other networking devices attached to the host-computing device; and firewall configuration. Such automatic configurations are based on the automatic detection of the network environment attached to the Soft AP enabled device. The automatic configurations may also be based on the intelligent interactions among different Soft AP enabled devices in the wireless network, which often includes devices with and without Soft AP functionalities.
    Type: Application
    Filed: July 22, 2004
    Publication date: April 14, 2005
    Inventors: Zhengjin Shu, Long Wang, Frank Huang, Chichian Yu, Biju Nair
  • Publication number: 20030093809
    Abstract: Channel equalization is performed by selecting an equalizer from a set of equalizers that have a common frequency response with the differences in the equalizers being able to be characterized by different values of a single variable. Selecting from a set of equalizers reduces the problem of training an equalizer to a one-dimensional optimization process. Specifically, the selection of the equalizer from the set is done through an optimization process in which a performance measure such as the signal-noise-ratio is maximized, or, as an alternative embodiment, some error measurements such as the power of the timing error signal is minimized. The set of equalizers may be generated from a root equalizer that has been already trained to compensate for a channel characteristic such that the set of equalizers all have the same frequency response, but have different group delays.
    Type: Application
    Filed: January 31, 2002
    Publication date: May 15, 2003
    Inventors: Zhengjin Shu, Thomas K. Paul, Norman C.H. Lo, Muhammed Zia, Moe A. Lwin
  • Publication number: 20030065830
    Abstract: A computer automatically measures one or more parameters (also called “observable parameters”; examples include number being dialed and line probing result), and the computer uses the measurements to identify a set of values of parameters (also called “controllable parameters”; examples include equalizer coefficients, echo canceller coefficients, and disabling of V.8bis/Kflex) from non-volatile memory, for use in a current connection. The values of controllable parameters in each set may have been saved in non-volatile memory while operating the modem in a previous connection, or may be default values set by the factory, for example. Use of a previously saved set of controllable parameter values to operate a modem during a current connection, saves time otherwise required to independently generate a set of values each time the modem is operated and increases modem performance.
    Type: Application
    Filed: January 31, 2002
    Publication date: April 3, 2003
    Inventors: Chien-Cheng Tung, Thomas Paul, Zhengjin Shu, Gary A. Anwyl, Derek Obata