Patents by Inventor Patrick M. McEachern

Patrick M. McEachern 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).

  • Self-healing link switched ring for ATM traffic
    Patent number: 6888791
    Abstract: The invention provides for a method for transporting a SONET formatted asynchronous transfer mode (ATM) signal and/or a synchronous transfer mode (STM) signal on a line switched ring over a unidirectional path. The SONET formatted ATM signal comprises cells mapped into a STS-Mc or m×STS-1s while the STM signal comprises STS-1s/VTS mapped STS-W. A unidirectional line switched ring is provided for transporting the STM STS-W using a unidirectional path switched protection protocol and the ATM STS-Mc using a unidirectional line switched protection protocol. A ring node comprises input and output ring interfaces, an STS management block, an ATM cell management block, and a non-ATM payload management block. The STS management block routes the traffic to the ATM cell management block and to the non-ATM payload management block, according to the traffic type. The STS management block also provides the UPSR protection for the STS-1s and ULSR protection for the STS-Mc.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: May 3, 2005
    Assignee: Nortel Networks Limited
    Inventors: Donald Russell Ellis, Brent E. Allen, David Wright Martin, Edward Ryszard Sokolowski, Patrick M. McEachern
  • Self-healing line switched ring for ATM traffic
    Patent number: 6256292
    Abstract: The invention provides for a method for transporting a SONET formatted asynchronous transfer mode (ATM) signal and/or a synchronous transfer mode (STM) signal on a line switched ring over a unidirectional path. The SONET formatted ATM signal comprises cells mapped into a STS-Mc or m×STS-1s while the STM signal comprises STS-1s/VTs mapped STS-W. A unidirectional line switched ring is provided for transporting the STM STS-W using a unidirectional path switched protection protocol and the ATM STS-Mc using a unidirectional line switched protection protocol. A ring node comprises input and output ring interfaces, an STS management block, an ATM cell management block, and a non-ATM payload management block. The STS management block routes the traffic to the ATM cell management block and to the non-ATM payload management block, according to the traffic type. The STS management block also provides the UPSR protection for the STS-1s and ULSR protection for the STS-Mc.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: July 3, 2001
    Assignee: Nortel Networks Corporation
    Inventors: Donald Russell Ellis, Brent E. Allen, David Wright Martin, Edward Ryszard Sokolowski, Patrick M. McEachern