Patents by Inventor Frederick R. Carter

Frederick R. Carter 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 and apparatus for arbitrating bandwidth in a communications switch
    Patent number: 7061935
    Abstract: A network switch includes at least one port processor and at least one switch element. The port processor has an SONET OC-x interface (for TDM traffic), a UTOPIA interface (for ATM and packet traffic), and an interface to the switch element. In one embodiment, the port processor has a total I/O bandwidth equivalent to an OC-48, and the switch element has 12×12 ports for a total bandwidth of 30 Gbps. A typical switch includes multiple port processors and switch elements. A data frame of 9 rows by 1700 slots is used to transport ATM, TDM, and Packet data from a port processor through one or more switch elements to the same or another port processor. Each frame is transmitted in 125 microseconds; each row in 13.89 microseconds. Each slot includes a 4-bit tag plus a 4-byte payload. The slot bandwidth is 2.592 Mbps which is large enough to carry an E-1 signal with overhead. The 4-bit tag is a cross connect pointer which is setup when a TDM connection is provisioned.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: June 13, 2006
    Assignee: Transwitch Corporation
    Inventors: Subhash C. Roy, Michael M. Renault, Frederick R. Carter, David K. Toebes, Rajen S. Ramchandani
  • Method of multicasting data through a communications switch
    Patent number: 6636511
    Abstract: A network switch includes at least one port processor and at least one switch element. The port processor has an SONET OC-x interface (for TDM traffic), a UTOPIA interface (for ATM and packet traffic), and an interface to the switch element. In one embodiment, the port processor has a total I/O bandwidth equivalent to an OC-48, and the switch element has 12×12 ports for a total bandwidth of 30 Gbps. A typical switch includes multiple port processors and switch elements. A data frame of 9 rows by 1700 slots is used to transport ATM, TDM, and Packet data from a port processor through one or more switch elements to the same or another port processor. Each frame is transmitted in 125 microseconds; each row in 13.89 microseconds. Each slot includes a 4-bit tag plus a 4-byte payload. The slot bandwidth is 2.592 Mbps which is large enough to carry an E-1 signal with overhead. The 4-bit tag is a cross connect pointer which is setup when a TDM connection is provisioned.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: October 21, 2003
    Assignee: Transwitch Corporation
    Inventors: Subhash C. Roy, Michael M. Renault, Frederick R. Carter, David K. Toebes, Rajen S. Ramchandani, Daniel C. Upp
  • Method for switching ATM, TDM, and packet data through a single communications switch
    Patent number: 6636515
    Abstract: A network switch includes at least one port processor and at least one switch element. The port processor has an SONET OC-x interface (for TDM traffic), a UTOPIA interface (for ATM and packet traffic), and an interface to the switch element. In one embodiment, the port processor has a total I/O bandwidth equivalent to an OC-48, and the switch element has 12×12 ports for a total bandwidth of 30 Gbps. A typical switch includes multiple port processors and switch elements. A data frame of 9 rows by 1700 slots is used to transport ATM, TDM, and Packet data from a port processor through one or more switch elements to the same or another port processor. Each frame is transmitted in 125 microseconds; each row in 13.89 microseconds. Each slot includes a 4-bit tag plus a 4-byte payload. The slot bandwidth is 2.592 Mbps which is large enough to carry an E-1 signal with overhead. The 4-bit tag is a cross connect pointer which is setup when a TDM connection is provisioned.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: October 21, 2003
    Assignee: Transwitch Corporation
    Inventors: Subhash C. Roy, Santanu Das, Daniel C. Upp, William B. Lipp, Jitender K. Vij, Michael M. Renault, Frederick R. Carter, Rajen S. Ramchandani