Patents by Inventor Anthony J. Ballardie

Anthony J. Ballardie 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).

  • Multicast routing using core based trees
    Patent number: 5331637
    Abstract: A method for routing multicast packets in a network is disclosed. A node s101 wishing to join a particular multicast group transmits a packet via a sequence of nodes (r101, r102, r104, r107) including a core node r107 on the multicast tree corresponding to the particular multicast group which the node wishes to join. The packet contains a request to join the particular multicast group and the multicast address of the core node r107 of the multicast tree corresponding to the particular multicast group. The packet is received at each node r101, r102, r104, r107 of the sequence of nodes. Each node r101, r102, r104, r107 which receives the packet writes an address of the node s101, r101, r102, r104 from which the packet was received in an entry of a multicast forwarding table maintained thereat which entry is indexed by the multicast address of the core node r107.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: July 19, 1994
    Assignee: Bell Communications Research, Inc.
    Inventors: Paul T. Francis, Anthony J. Ballardie, Jonathan A. Crowcroft