Patents by Inventor Todd H. Mansfield

Todd H. Mansfield 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: 6914881
    Abstract: A method and apparatus for queue selection is described below as Prioritized Continuous-Deficit Round Robin (PC-DRR) Scheduling. In PC-DRR scheduling a queue is selected as a source for the shared datapath using a modified round-robin approach, where queues are cyclically, sequentially evaluated to determine whether or not there is data stored in the queue. In PC-DRR scheduling, each queue is assigned a weight, wherein the weight corresponds to a predefined bandwidth that is allocated to the queue. Thus, the weight defines a fixed allotment of transmit opportunities that are to be allowed for the associated queue during its transmit tenure. In a preferred embodiment, a minimum permissible weight that is assigned to a queue is equal to a Maximum Packet Size. As data are drained from the queue, the weight is decreased incrementally by the amount of data sent, providing a balance.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: July 5, 2005
    Assignee: Nortel Networks Ltd
    Inventors: Todd H. Mansfield, Jeffrey L. Cooper