Patents by Inventor Donald Fred Towsley

Donald Fred Towsley 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: 5884174
    Abstract: Improved wireless telephone call admission methods for admitting new and/or handoff calls into a wireless telephone network having a plurality of communications channels. One such method, fractional guard channel call admission, effectively reserves a non-integral number of guard channels for handoff calls by rejecting new calls in accordance with a probability value that is dependent upon the current channel occupancy. Fractional guard channel call admission results in a significant reduction of new call blocking when a fixed constraint is placed on the handoff call blocking probability. Fractional guard channel call admission also provides improvements over the integral guard channel policy by minimizing the number of required channels when fixed constraints are placed on both the new call blocking probability and the handoff call blocking probability.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: March 16, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Ramesh Nagarajan, Ramachandran Ramjee, Donald Fred Towsley