Patents by Inventor Churui Chang

Churui Chang 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).

  • Method and apparatus for configuring PN-offsets for a non-uniform CDMA cellular network
    Patent number: 6317453
    Abstract: A method for configuring a spread spectrum cellular network for small-cell inclusion, by providing a finite series of PN-offsets, each PN-offset is separated by a constant value that is allotted to the spread spectrum cellular network. The finite series is portioned into a first and a second set. The second set subsequent to the first set and having sufficient PN-offset elements for a PN-offset reuse pattern having a plurality of cells, each cell having similar transmission characteristics. The second set is assigned to the PN-offset reuse pattern, deploying the cellular reuse pattern for a cellular network. Small cells are insertable into the spread spectrum cellular network by assigning the first set to a PN-offset reuse pattern having a plurality of small cells arranged in a small-cell reuse pattern, and deploying the small-cell reuse pattern.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: November 13, 2001
    Assignee: Nortel Networks Limited
    Inventor: Churui Chang
  • Method and apparatus for configuring PN-offsets for a non-uniform CDMA cellular network
    Patent number: 6049564
    Abstract: A method for configuring a spread spectrum cellular network for small-cell inclusion, by providing a finite series of PN-offsets, each PN-offset is separated by a constant value that is allotted to the spread spectrum cellular network. The finite series is portioned into a first and a second set. The second set subsequent to the first set and having sufficient PN-offset elements for a PN-offset reuse pattern having a plurality of cells, each cell having similar transmission characteristics. The second set is assigned to the PN-offset reuse pattern, deploying the cellular reuse pattern for a cellular network. Small cells are insertable into the spread spectrum cellular network by assigning the first set to a PN-offset reuse pattern having a plurality of small cells arranged in a small-cell reuse pattern, and deploying the small-cell reuse pattern.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: April 11, 2000
    Assignee: Northern Telecom Limited
    Inventor: Churui Chang