Patents by Inventor Andrew Long

Andrew Long 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).

  • Publication number: 20020141344
    Abstract: The present invention is a methodology for controlled switchover of unicast and multicast data flows in packet based switching system. In some cases it is advantageous to purposefully support switchover of flows from one path to the other without causing loss of data. This is termed a “controlled” or “hitless” switchover. For example, it may be required to upgrade or replace a card and it is desirous to do this without taking an “Errored Second” hit at the system level. In accordance with the present invention switchover methodology, given that an ingress arbiter device is transmitting to both cores simultaneously, it is required that the flows to both switching cores be synchronized at an aggregator level and that an egress arbiter be given time to cease receiving packets from one Core then switch over to the other Core, and continue receiving packets.
    Type: Application
    Filed: March 29, 2001
    Publication date: October 3, 2002
    Inventors: P. K. Chidambaran, Thomas A. Hoch, John Patrick Jones, Andrew A. Long, Prasasth R. Palnati, Raymond J. Schmidt
  • Publication number: 20020080723
    Abstract: The present invention is a methodology for providing fault detection and service restoration for a multiservice switch on a per flow basis. An ingress source transmits the same data over each of the redundant cores. An egress receiver selects on a per flow basis which core to utilize. Bi-directional flows are not necessarily grouped together. That is, for a duplex path, one direction of transmission can proceed through a first core and the other direction can proceed through the other core if required. The basic approach to fault detection is to assume that the two cores are not in lock step, but that the shelves are continually monitoring link flows for control path data as well as user data. The path monitoring is done largely in dedicated hardware and the status is passed up to a local processor within a service shelf in order that recovery can proceed quickly.
    Type: Application
    Filed: December 26, 2000
    Publication date: June 27, 2002
    Inventors: Thomas A. Hoch, John Patrick Jones, Andrew A. Long, Prasasth R. Palnati, Ronald M. Parker, Raymond J. Schmidt
  • Publication number: 20020068696
    Abstract: The present invention relates, at least in part, to methods of modulating proliferation and apoptotic state of cells using agents that modulate the expression and/or activity of TRADE family polypeptides. In addition, the invention provides two novel members of the TRADE family of molecules.
    Type: Application
    Filed: February 9, 2001
    Publication date: June 6, 2002
    Inventors: Clive Wood, Divya Chaudhary, Andrew Long