Patents by Inventor Prathivadhi B. Krishna

Prathivadhi B. Krishna 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 performing a hand-off in a wireless communication system
    Patent number: 5392331
    Abstract: A method and apparatus in a digital wireless communication system (100) controls an inter-cell hand-off. First and second fixed units (102) receive a common synchronization signal from a controller (104), and a first wireless link is established between the first fixed unit and a portable unit (120) on a first frequency. The first wireless link is synchronized to the common synchronization signal, and frame synchronization is obtained between the fixed unit (102) and the portable unit (120) during establishment of the first wireless link. Frame synchronization is maintained only by maintaining bit synchronization while transmitting user data on the first frequency. A second wireless link is established between the second fixed unit (102) and the portable unit (120) on the first frequency if the first frequency is usable therebetween. The second wireless link is synchronized to the common synchronization signal.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: February 21, 1995
    Assignee: Motorola, Inc.
    Inventors: Stelios J. Patsiokas, Craig Wadin, Paul Marko, Prathivadhi B. Krishna
  • Method and apparatus for communication maintenance and termination
    Patent number: 5267230
    Abstract: A communication system base site (300) receives a signal (400) representing voice information (402) and data information (404 or 404') from a communication channel. At least the data information is processed to verify the integrity of the communication channel, and the voice information (402) is transmitted when the integrity of the communication channel is verified.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: November 30, 1993
    Assignee: Motorola, Inc.
    Inventors: Prathivadhi B. Krishna, Raul Pombo