Patents by Inventor Rory A. Smith

Rory A. Smith 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).

  • System and method for multicast communications using real time transport protocol (RTP)
    Patent number: 7929475
    Abstract: An Internet protocol (IP) packet switching communication system using real time transport protocol (RTP). Control packets map group identification codes to a multicast address on a network. Control packets are distributed on the network using simple object access protocol (SOAP) messages with extensible markup language (XML) payloads. Mapping may include dynamic or static functions. Multicast address data is distributed among routers. A message from a caller is multicast by the routers, based on the multicast address, to one or more destinations.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: April 19, 2011
    Assignee: E. F. Johnson Company
    Inventors: Dana Simonson, John Livdahl, Rory A. Smith
  • System and method for multicast communications using real time transport protocol (RTP)
    Patent number: 7221660
    Abstract: An Internet protocol (IP) packet switching communication system using real time transport protocol (RTP). Control packets map group identification codes to a multicast address on a network. Control packets are distributed on the network using simple object access protocol (SOAP) messages with extensible markup language (XML) payloads. Mapping may include dynamic or static functions. Multicast address data is distributed among routers. A message from a caller is multicast by the routers, based on the multicast address, to one or more destinations.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: May 22, 2007
    Assignee: E.F. Johnson Company
    Inventors: Dana Simonson, John Livdahl, Rory A. Smith
  • Trunked radio repeater communication system including home channel aliasing and call grouping
    Patent number: 6804529
    Abstract: A system for channel assignment in a trunked transmission communication system including a plurality of subscribers. A plurality of subscribers is provided home channel assignment to reduce collisions. A home channel alias is provided for home channel coverage where a designated home channel is unavailable. A system for call grouping is provided to avoid talk group splitting. A first check is used to determine if other channels are conducting communications with identical home and talk group information. A second check is available after a temporary channel assignment. In one system both the home channel aliasing and call grouping are performed.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: October 12, 2004
    Assignee: Transcrypt Internationall E. F. Johnson Company
    Inventors: Keith W. Barnes, Rory A. Smith, Mervin L. Grindahl
  • Trunked radio repeater communication system including home channel aliasing and call grouping
    Patent number: 6684080
    Abstract: A system for channel assignment in a trunked transmission communication system including a plurality of subscribers. A plurality of subscribers is provided home channel assignment to reduce collisions. A home channel alias is provided for home channel coverage where a designated home channel is unavailable. A system for call grouping is provided to avoid talk group splitting. A first check is used to determine if other channels are conducting communications with identical home and talk group information. A second check is available after a temporary channel assignment. In one system both the home channel aliasing and call grouping are performed.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: January 27, 2004
    Assignee: Transcrypt International/E. F. Johnson Company
    Inventors: Keith W. Barnes, Rory A. Smith, Mervin L. Grindahl
  • Trunked radio repeater communication system
    Patent number: 6529486
    Abstract: A trunked radio repeater communication system capable of use in a networked system includes a plurality of distributive switches and a unique signaling protocol and a switching protocol for interconnecting the trunked transmission communications systems into a wide area network that provides an expanded feature set of radio communications capabilities. The trunked radio repeater system including a protocol supporting communications for repeaters and/or subscribers conducting communications using existing protocols, such as the Logic Trunked Radio (LTR) protocol and supporting additional special functions.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: March 4, 2003
    Assignee: Transcrypt International/E.F. Johnson Company
    Inventors: Keith W. Barnes, Rory A. Smith, Mervin L. Grindahl
  • Method and apparatus for trunked radio repeater communications with backwards compatibility
    Patent number: 6374115
    Abstract: A trunked radio repeater communication system capable of use in a networked system includes a plurality of distributive switches and a unique signaling protocol and a switching protocol for interconnecting the trunked transmission communications systems into a wide area network that provides an expanded feature set of radio communications capabilities. The trunked radio repeater system including a protocol supporting communications for repeaters and/or subscribers conducting communications using existing protocols, such as the Logic Trunked Radio (LTR) protocol and supporting additional special functions.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: April 16, 2002
    Assignee: Transcrypt International/E.F. Johnson
    Inventors: Keith W. Barnes, Rory A. Smith, Mervin L. Grindahl