Patents by Inventor Philip N Johnson

Philip N Johnson 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).

  • Communication system for circuit switched and packet switched traffic
    Patent number: 6788664
    Abstract: A communication system, in particular a fixed wireless access communication system, including a transmission link, such as a broadcast downlink or a multiple access uplink, having a number of channels and apparatus for transmitting circuit switched and packet switched traffic over said transmission link. The system additionally includes a controller device for periodically pre-allocating channels to circuit switched traffic for a set time period dependent on one or more system parameters existing in a previous set time period. The system parameter may be the number of circuit switched connections operating in a previous set time period. The controller device may comprise a monitoring unit for determining a first number equal to the number of operating circuit switched connections in a previous set time period, a summing unit for forming a sum of the first number and an estimated margin and apparatus for allocating the summed number of channels to circuit switched connections for the next set time period.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: September 7, 2004
    Assignee: Nortel Networks Limited
    Inventors: Mark K Thomas, Peter Beighton, Philip N Johnson
  • Self-installation of wireless access network terminals
    Patent number: 6636490
    Abstract: Self installation of subscriber terminals in a wireless access network is desirable in order to reduce the costs of rolling-out such a network. However correct configuration of the terminal within a sub-method network by the subscriber cannot be relied upon.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: October 21, 2003
    Assignee: Nortel Networks Limited
    Inventor: Philip N Johnson
  • Service selection on IP access networks
    Patent number: 6577627
    Abstract: Traditionally a user has accessed an Internet Service Provider (ISP) using a circuit switched access network such as the Public Switched Telephone Network (PSTN). This advantage is lost in current packet switched access networks where there is no mechanism for a user to select a particular ISP in the access network. The present invention provides a method for a user in a packet switched access network to select a connection facility to a second network, the method comprising, the user prepending the access network address of the connection facility to each data packet sent across the access network by the user, and the access network connection removing the prepended address from each packet prior to sending the packets on to the second network.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: June 10, 2003
    Assignee: Nortel Networks Limited
    Inventors: Richard J Driscoll, Philip N Johnson