Patents Assigned to InterDigital Communications Corp.
  • Patent number: 7437177
    Abstract: A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: October 14, 2008
    Assignee: InterDigital Communications Corp.
    Inventors: Fatih Ozluturk, Gary R. Lomp
  • Publication number: 20040259564
    Abstract: In a wireless communication network, a system and method for transferring a wireless session context allows a subscriber access unit to transfer the session context from one base station to another base station depending on a loading factor which indicates the throughput load through each of the base stations. A subscriber access unit which is located in an overlapping wireless coverage area served by both base stations can transfer the session context such that it is served by the base station having the least throughput load. Subscriber access units in overlapping coverage areas will therefore tend to transfer session context to the least burdened base station processor. In this manner, performance is improved because subscriber access units within a wireless coverage area of multiple base station processors are transferred to the base station able to provide the maximum throughput.
    Type: Application
    Filed: May 11, 2004
    Publication date: December 23, 2004
    Applicant: InterDigital Communications Corp.
    Inventors: Kevin L. Farley, Carlo Amalfitano
  • Publication number: 20040192298
    Abstract: A system apparatus for wireless communication that includes receiving, receiving data for a subscriber, determining the subscriber to whom the data is addressed, determining which cell the subscriber currently resides, and transmitting the data accordingly.
    Type: Application
    Filed: April 8, 2004
    Publication date: September 30, 2004
    Applicant: InterDigital Communications Corp.
    Inventors: Kevin Farley, Thomas Gorsuch
  • Publication number: 20040151141
    Abstract: Method and apparatus for base stations and subscriber units allows soft handoff of a CDMA reverse link utilizing an orthogonal channel structure. Subscriber units transmit an orthogonally coded signal over a reverse link to the base stations. A given base station provides timing control of the timing offset of the reverse link signal. Based on at least one criterion, an alignment controller determines that the given base station should hand off timing control to another base station, and a soft handoff process ensues. In response to a command or message for soft handoff of the subscriber unit from the given base station to another base station, the subscriber unit makes a coarse timing adjustment to the timing of the coded signal. The subscriber unit may make fine timing adjustments based on feedback from the base station controlling timing. Multiple base stations may provide power control feedback to the subscriber unit.
    Type: Application
    Filed: November 20, 2003
    Publication date: August 5, 2004
    Applicant: InterDigital Communications Corp.
    Inventors: James A. Proctor, Pertti O. Alapuranen