Patents by Inventor David J. Mitton

David J. Mitton 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).

  • AAA broker specification and protocol
    Patent number: 6915345
    Abstract: In an IP-based mobile communications system, the Mobile Node changes its point of attachment to the network while maintaining network connectivity. The present invention improves the attachment of the Mobile Node to the IP mobile communications system by allowing a AAA Broker Server to maintain client information necessary to establish the a secure Mobile Node connection to the home network.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: July 5, 2005
    Assignee: Nortel Networks Limited
    Inventors: Rambabu Tummala, David J. Mitton, Haseeb Akhtar
  • Many to few group address translation through a network bridge
    Patent number: 5956335
    Abstract: A method for connecting a first communication system with a third communications system, by passing through a second communications system, is disclosed. A first frame is received from the first communications system, where the first frame has a multicast address as a destination address. The multicast address requires the frame to be transmitted onto the second multicast address is translated into a functional address. The functional address is written into a second frame, and the second frame is transmitted onto the second communications system. A station receiving the second frame translates the functional address into a multicast address and writes the multicast address into the destination address field of a third frame, and transmits the third frame onto the third communications system.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: September 21, 1999
    Assignee: Cabletron Systems, Inc.
    Inventors: Floyd J. Backes, William R. Hawe, G. Paul Koning, David J. Mitton, Radia J. Perlman
  • Many to few group address translation through a network bridge
    Patent number: 5428615
    Abstract: A connection apparatus for connecting a first communication system with a second communication system and a third communication system. A first frame is received from the first communication system, where the first frame has a multicast address as a destination address, and where the destination address requires the first frame to be transmitted onto the second communication system. The multicast address is translated into a functional address, and the functional address is written into a second frame transmitted onto the second communication system. The second frame is received and is transmitted onto a third communication system, and the functional address is translated into a multicast address for the third communication system, and the multicast address is written into a destination field of the frame as it is transmitted onto the third communication system. The second communication system may be a token ring system based upon an IEEE 802.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: June 27, 1995
    Assignee: Digital Equipment Corp.
    Inventors: Floyd J. Backes, William R. Hawe, G. Paul Koning, David J. Mitton, Radia J. Perlman