Patents by Inventor Sudarshan Keshava

Sudarshan Keshava 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).

  • System frame number (SFN) evaluator
    Patent number: 7734264
    Abstract: An access terminal (102) reacquires a system frame number (SFN) when a difference between a continuous counter elapsed time (220) and a calculated elapsed time (222) exceeds a threshold. The continuous counter elapsed time (220) is generated by a continuous counter (122) remaining active during a sleep state of the access terminal (102) and the calculated elapsed time (222) is based on a SFN derived from a counter value generated by a discontinuous counter (124) that is deactivated during the sleep state. In one aspect, the continuous counter (122) may be clocked by a continuous clock (118) during a sleep mode and the discontinuous counter (124) may be clocked by a faster clock (120) that is deactivated during the sleep mode. During reactivation after the sleep mode, the discontinuous counter (120) is set, at the counter set time, to a reset counter value (126) corresponding to an SFN indicated by the continuous counter (122).
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: June 8, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Anil S. Rao, Chandra Kumar, Gurdeep Singh, Kiran Chikkappa, Messay Amerga, Maheedhar Gollamudi, Sudarshan Keshava
  • SYSTEM FRAME NUMBER (SFN) EVALUATOR
    Publication number: 20080056422
    Abstract: An access terminal (102) reacquires a system frame number (SFN) when a difference between a continuous counter elapsed time (220) and a calculated elapsed time (222) exceeds a threshold. The continuous counter elapsed time (220) is generated by a continuous counter (122) remaining active during a sleep state of the access terminal (102) and the calculated elapsed time (222) is based on a SFN derived from a counter value generated by a discontinuous counter (124) that is deactivated during the sleep state. In one aspect, the continuous counter (122) may be clocked by a continuous clock (118) during a sleep mode and the discontinuous counter (124) may be clocked by a faster clock (120) that is deactivated during the sleep mode. During reactivation after the sleep mode, the discontinuous counter (120) is set, at the counter set time, to a reset counter value (126) corresponding to an SFN indicated by the continuous counter (122).
    Type: Application
    Filed: August 29, 2006
    Publication date: March 6, 2008
    Inventors: Anil S. Rao, Chandra Kumar, Gurdeep Singh, Kiran Chikkappa, Messay Amerga, Maheedhar Gollamudi, Sudarshan Keshava