Patents by Inventor Martin Raymond Scott

Martin Raymond Scott 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).

  • Patent number: 7817673
    Abstract: A method of synchronising first and second clocks coupled respectively to ingress and egress interfaces 6,7 of a packet network 1, the method comprising calculating a minimum packet Transit Time over the network 1 in each of successive time intervals, and varying the frequency of the second clock so as to track variations in the minimum packet Transit Time.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: October 19, 2010
    Assignee: Zarlink Semiconductor Limited
    Inventors: Martin Raymond Scott, Timothy Michael Edmund Frost, Geoffrey Edward Floyd, Martin Crowle
  • Publication number: 20080212619
    Abstract: A method of synchronising first and second clocks coupled respectively to ingress and egress interfaces 6,7 of a packet network 1, the method comprising calculating a minimum packet Transit Time over the network 1 in each of successive time intervals, and varying the frequency of the second clock so as to track variations in the minimum packet Transit Time.
    Type: Application
    Filed: March 27, 2008
    Publication date: September 4, 2008
    Inventors: Martin Raymond SCOTT, Timothy Michael Edmund Frost, Geoffrey Edward Floyd, Martin Crowle
  • Patent number: 7411970
    Abstract: A method of recovering a clock signal for a TDM output from packets of TDM data which have been transmitted over a packet network, from a source having a source TDM clock to a destination having a destination TDM clock. The method includes providing at least some packets with a Remote Time stamp representing the state of the source TDM clock when the packet is created; providing said at least some packets with a Local Timestamp representing the state of the destination TDM clock when the packet is received; determining a Transit Time value representing the difference between said Local and Remote Timestamps; and controlling the clock frequency of the TDM output on the basis of said Transit Time as determined above.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: August 12, 2008
    Assignee: Zarlink Semiconductor Limited
    Inventors: Martin Raymond Scott, Nicholas Faithorn, Timothy Michael Edmund Frost
  • Patent number: 7277452
    Abstract: A method of updating a lookup table associated with a TDM transmit unit which is coupled to a packet network to receive data therefrom, the lookup table mapping packet network contexts to TDM channels. The method includes priming a controller with data for updating the lookup table in advance of the receipt of packets containing data to which the update relates, incorporating a flag in each packet sent over the packet network to the TDM transmit unit, the flag being set to indicate whether or not a packet is the first packet to which the update relates, and detecting the setting of the flag in a first packet and in response updating the lookup table with the update data.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: October 2, 2007
    Assignee: Zarlink Semiconductor V.N. Inc.
    Inventors: Geoffrey Edward Floyd, Timothy Michael Edmund Frost, James F. Kosolowski, Martin Raymond Scott
  • Patent number: 7085265
    Abstract: A method of mapping between contexts of a packet network and TDM channels and streams. The method comprises constructing a lookup table defining the sequence in which data is to be mapped between contexts and TDM channels and streams, and including for each row of the table a flag which indicates whether or not that entry is the first entry in the table for the corresponding context. As the TDM receive or transmit entity cycles through the lookup table, use is made of the flags to synchronize the start of each packet with the first entry of a TDM frame for each context.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: August 1, 2006
    Assignee: Zarlink Semiconductor V.N. Inc.
    Inventors: Geoffrey Edward Floyd, Timothy Michael Edmund Frost, James F. Kosolowski, Martin Raymond Scott
  • Publication number: 20040258099
    Abstract: A method of synchronising first and second clocks coupled respectively to ingress and egress interfaces 6,7 of a packet network 1, the method comprising calculating a minimum packet Transit Time over the network 1 in each of successive time intervals, and varying the frequency of the second clock so as to track variations in the minimum packet Transit Time.
    Type: Application
    Filed: March 4, 2004
    Publication date: December 23, 2004
    Inventors: Martin Raymond Scott, Timothy Michael Edmund Frost, Geoffrey Edward Floyd, Martin Crowle
  • Publication number: 20030081597
    Abstract: A method of writing data to a packet memory device in a system for transmitting data in packets across a packet network, wherein said packets are arranged to form a plurality of packet streams, the method comprising:
    Type: Application
    Filed: September 18, 2002
    Publication date: May 1, 2003
    Inventor: Martin Raymond Scott
  • Publication number: 20030081629
    Abstract: A system is provided for transmitting constant bit rate data across a packet network, the system comprising:
    Type: Application
    Filed: October 1, 2002
    Publication date: May 1, 2003
    Inventors: Martin Raymond Scott, Timothy Michael Edward Frost, James F. Kosolowski, Geoffrey Edward Floyd
  • Publication number: 20030031205
    Abstract: A method of updating a lookup table associated with a TDM transmit unit which is coupled to a packet network to receive data therefrom, the lookup table mapping packet network contexts to TDM channels. The method includes priming a controller with data for updating the lookup table in advance of the receipt of packets containing data to which the update relates, incorporating a flag in each packet sent over the packet network to the TDM transmit unit, the flag being set to indicate whether or not a packet is the first packet to which the update relates, and detecting the setting of the flag in a first packet and in response updating the lookup table with the update data.
    Type: Application
    Filed: August 9, 2002
    Publication date: February 13, 2003
    Inventors: Geoffrey Edward Floyd, Timothy Michael Edmund Frost, James F. Kosolowski, Martin Raymond Scott
  • Publication number: 20030031199
    Abstract: A method of mapping between contexts of a packet network and TDM channels and streams. The method comprises constructing a lookup table defining the sequence in which data is to be mapped between contexts and TDM channels and streams, and including for each row of the table a flag which indicates whether or not that entry is the first entry in the table for the corresponding context. As the TDM receive or transmit entity cycles through the lookup table, use is made of the flags to synchronize the start of each packet with the first entry of a TDM frame for each context.
    Type: Application
    Filed: May 21, 2002
    Publication date: February 13, 2003
    Inventors: Geoffrey Edward Floyd, Timothy Michael Edmund Frost, James F. Kosolowski, Martin Raymond Scott
  • Publication number: 20030016693
    Abstract: A TDM transmitter system for receiving packets of TDM data from a packet network and transmitting these on a TDM network. The TDM transmitter system includes a packet receiver arranged to receive the packets from the packet network, a buffer memory for storing packets received by the receiver, and a TDM transmitter arranged to receive the packets from the memory buffer, convert these to TDM data for transmission on a TDM network, and transmit said TDM data on a TDM network. The TDM transmitter of the TDM data corresponding to the first packet is delayed for a programmable number of TDM frame periods.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 23, 2003
    Inventors: Geoffrey Edward Floyd, Timothy Michael Edmund Frost, James F. Kosolowski, Martin Raymond Scott