Patents by Inventor Qing-An Zeng

Qing-An Zeng 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).

  • Patent number: 6496492
    Abstract: A hand-off control method is disclosed that can reduce the rate of occurrence of forced disconnection of communication. The intensity of signals received from a base station is periodically measured in a mobile station, the amount of relative change in received signal intensity is calculated for every measurement interval, and the measurement results and calculation results are notified to the base station and the base station of the hand-off destination. If the mobile station requests hand-off, the call of the mobile station is allocated in the hand-off destination base station to an appropriate queue among a plurality of queues that are given an order of priority, based on the amount of relative change for the call. The call is reallocated to a queue that corresponds to the new amount of relative change whenever the amount of relative change is updated. In addition, the waiting rank of the call within the queue is determined based on the received signal intensity at the mobile station.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: December 17, 2002
    Assignee: NEC Corporation
    Inventor: Qing-An Zeng