Patents by Inventor Matthew James Collins

Matthew James Collins 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).

  • Method of constructing a forwarding database for a data communications network
    Patent number: 8223666
    Abstract: A method of constructing a forwarding database for a data communications network comprising a plurality of network components and supporting at least first and second topologies having one or more common network components is described. The forwarding database includes a plurality of entries providing forwarding information for data destined for a related network component. The method comprises the step, performed at a constructing network component, of deriving topology dependent forwarding information for data destined for a network component. The method further comprises the step of including the topology dependent forwarding information at the related forwarding database entry.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: July 17, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Neil Alasdair James Jarvis, Crispin Nicholas Dent-Young, Alan J. Cheilek, Matthew James Collins, Christian Cassar, Jesper Skriver
  • Method and apparatus for constructing a forwarding database for a data communications network
    Patent number: 7969995
    Abstract: A method of constructing a forwarding database for a data communications network comprising a plurality of network components and supporting at least first and second topologies having one or more common network components is described. The forwarding database includes at least first and second database structures having records including forwarding information for data destined for related network components in the respective topologies. Each database structure has a plurality of elements including a pointer to one of a succeeding element or a record including said forwarding information. The method comprises the step, performed at a constructing network component of identifying a network component common to the first and second topologies for which a record exists in the second database structure. The method further comprises the step of including a pointer from the related element in the first database structure to a corresponding element or record in the second database structure.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: June 28, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Matthew James Collins, Neil Alasdair James Jarvis
  • Demodulator circuit
    Patent number: 7912155
    Abstract: The invention relates to a demodulator circuit in a communication system using a multi-carrier modulation scheme. The demodulator uses channel state information for respective carriers in the multi-carrier modulation to de-map the received data.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: March 22, 2011
    Assignee: Conexant Systems, Inc.
    Inventor: Matthew James Collins
  • Method and apparatus for a demodulator circuit
    Patent number: 7106810
    Abstract: A method and apparatus for a demodulator circuit in a communication system is described. The invention relates to a demodulator circuit in a communication system using a multi-carrier modulation scheme. The demodulator makes efficient use of channel state information for respective carriers in the multi-carrier modulation to de-map the received data. An efficient method of calculating channel state information is also disclosed.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: September 12, 2006
    Inventors: Matthew James Collins, Jonathan Parker
  • Receiver circuit
    Patent number: 6754292
    Abstract: A receiver circuit is for processing a received signal which includes at least a first portion and a second portion which repeats the content of the first portion after a repeat interval. For example, the receiver may be for DVB-T signals using COFDM. Two correlation values are measured. The first is between the first portion of the received signal, delayed by the repeat interval plus a difference interval, and the second portion. The second is between the first portion of the received signal, delayed by the repeat interval minus a difference interval, and the second portion. Any difference between the correlation values represents a difference between the receiver sampling rate, and the required sampling rate, and can be used to adjust the receiver sampling rate.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: June 22, 2004
    Assignee: Conexant System, Inc.
    Inventors: Douglas Roger Pulley, Matthew James Collins
  • Demodulator circuit
    Publication number: 20040071229
    Abstract: The invention relates to a demodulator circuit in a communication system using a multi-carrier modulation scheme. The demodulator uses channel state information for respective carriers in the multi-carrier modulation to de-map the received data.
    Type: Application
    Filed: October 29, 2003
    Publication date: April 15, 2004
    Inventor: Matthew James Collins
  • Method and apparatus for a demodulator circuit
    Publication number: 20020154711
    Abstract: A method and apparatus for a demodulator circuit in a communication system is described. The invention relates to a demodulator circuit in a communication system using a multi-carrier modulation scheme. The demodulator makes efficient use of channel state information for respective carriers in the multi-carrier modulation to de-map the received data. An efficient method of calculating channel state information is also disclosed.
    Type: Application
    Filed: March 22, 2002
    Publication date: October 24, 2002
    Inventors: Matthew James Collins, Jonathan Parker