Patents by Inventor Andrew Geoffrey Tomlins

Andrew Geoffrey Tomlins 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).

  • Communications network
    Patent number: 6954461
    Abstract: A method of adapting synchronous time division multiplexed (TDM) traffic at an interface between a synchronous network in which the traffic is transported in frames identified by corresponding pointers and labels and an asynchronous network in which the adapted traffic is transported in cells, the method comprising mapping said synchronous frames into primary multiplexed groups, mapping each said primary multiplexed group into traffic cells in a respective asynchronous virtual channel, and providing that virtual circuit with a corresponding virtual channel indicator, and wherein said pointers and labels are mapped into one or more separate asynchronous cells for transport ahead or said traffic cells.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: October 11, 2005
    Assignee: Nortel Networks Limited
    Inventors: Andrew Geoffrey Tomlins, Simon Daniel Brueckheimer, David John Stacey, John A Shotton, Osama Bhagat, Greg Bernstein
  • Automated line signal processing
    Patent number: 6778503
    Abstract: A method and apparatus for handling persistence measurement of channel associated signaling for a plurality of line circuits, eg, T1, E1, OC3, STM 1 circuits, which extracts channel associated signaling data from a plurality of line circuits; assembles the channel associated signaling data into a data frame; contains the data frame in a suitable carrier, eg, an AAL 0 cell; monitors a continuous stream of the data frames, to check for changes in line status; and generates an event message data frame when a persistent change of line state has been detected. The extracting of associated signaling data may be provided on a separate card to a call control processor, and using separate processor functionality.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: August 17, 2004
    Assignee: Nortel Networks Limited
    Inventors: Martin Sproat, Julian Frank Barry Cable, Simon Daniel Brueckheimer, Michael Flynn Thomas, Andrew Geoffrey Tomlins, David John Stacey, John Andrew Shotton, Fai Tsang, Stephen Rylant Evans, William Smith
  • Adaption resource module and operating method therefor
    Patent number: 6266342
    Abstract: In order to support both signalling processing on a per channel basis and multiple adaptation protocols, an interface (10) is modularised principally by function. Incident channels (60-62, Cho—Chn) are applied to a routing device (16) that consults a connection map (64) to determine an appropriate path, via an interface (90), for signal processing of each channel, as shown in FIG. 2. Modularised processing platforms (70-74) each contain a number of signal processors (80-86), with each processing platform providing an additional level of indirection with respect to channel handling. In this latter respect, one of the signal processors (86) on each platform is assigned to distribute channel processing to appropriately configured other ones of the signal processors and such that signal processing functions may be distributed between the other ones (80-84) of the signal processors.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: July 24, 2001
    Assignee: Nortel Networks Limited
    Inventors: David John Stacey, Simon Daniel Brueckheimer, Martin Sproat, Andrew Geoffrey Tomlins, Fai Tsang, John Shotton