Patents by Inventor Brian Wirth

Brian Wirth 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).

  • DS-0 synchronization over a wireless ATM link
    Patent number: 6765917
    Abstract: A system and method for the transmission of synchronization information from a wireless asynchronous transfer mode (ATM) base station across a point to point or point to multipoint wireless link, to one or more network interface units (NIUs). Each of the NIUs is capable of supporting a combination of structured or unstructured T1 and/or E1 circuit emulation services. The technique involves locking the wireless modem downstream symbol clock to an externally provided frequency reference from the base station. The reference is an N integer multiple of 8 kHz which is the lowest common denominator for both the T1 and E1 clocking rates.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: July 20, 2004
    Assignee: Alcatel Canada Inc.
    Inventors: Alan W. Jaakkola, Donna Godin, Brian Wirth
  • LAN bridging redundancy
    Patent number: 5982745
    Abstract: In a method implementing redundancy in LAN/WAN bridging/switching elements, LAN/WAN traffic is sent to active and inactive elements using multicast techniques. The active element bridges the data traffic and the inactive drops it.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: November 9, 1999
    Assignee: Newbridge Networks Corporation
    Inventors: Mark Wolff, Phil Worthington, Merrill Arcand, Brian Wirth, Alain Brazeau
  • Fast packet switch
    Patent number: 5563876
    Abstract: The invention provides a very fast distributed frame relay switch. Each switching element is tied to each other switching element using LAN like FDDI technology. Frame relay packets arrive into the switch via lower speed TDM based trunks and can either be switched locally within the same switching element or can be switched to a remote switching element via the FDDI bus. The switching elements themselves reside in a TDM based multiplexer, thus can utilize existing TDM interfaces.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: October 8, 1996
    Assignee: Newbridge Networks Corporation
    Inventors: Tom Duxbury, Brian Wirth, Wayne Burwell, Paul Crozier
  • Fault tolerant FDDI wiring hub
    Patent number: 5546378
    Abstract: A wiring hub for interconnecting a plurality of switching units, includes a plurality of interface modules for connection to respective external switching units in a dual-attached connection, and a dual FDDI ring interconnecting the interface modules. The interface modules include a switching element operable to bypass each switching unit or insert it on the ring in a dual-attached connection. The switching element automatically switches the interface module to its bypass state when a switching unit is disconnected from the wiring hub.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: August 13, 1996
    Assignee: Newbridge Networks Corporation
    Inventors: Brian Wirth, Tom Duxbury