Patents by Inventor Quang T Tran
Quang T Tran 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).
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Patent number: 8879444Abstract: In one embodiment, a method is described for detecting an operational failure between the network unit and an adjacent network unit in the stack; controlling the switching engine to redirect packets which would otherwise be sent from a particular port to the adjacent network unit to be forwarded from another port to be sent to a different network unit in the stack; and entering the switching engine into a bypass mode in response to control data indicating an operational failure between at least two other network units in the stack to cause packets to be forwarded without being re-directed by the switching engine.Type: GrantFiled: June 18, 2012Date of Patent: November 4, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Bryan J Donoghue, Quang T Tran, Eugene O'Neill, David J Law, Paul J Moran, Edele O'Malley, Jerome Nolan, Kam Choi, Maurice A Goodfellow
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Publication number: 20120314564Abstract: In one embodiment, a method is described for detecting an operational failure between the network unit and an adjacent network unit in the stack; controlling the switching engine to redirect packets which would otherwise be sent from a particular port to the adjacent network unit to be forwarded from another port to be sent to a different network unit in the stack; and entering the switching engine into a bypass mode in response to control data indicating an operational failure between at least two other network units in the stack to cause packets to be forwarded without being re-directed by the switching engine.Type: ApplicationFiled: June 18, 2012Publication date: December 13, 2012Inventors: Bryan J. DONOGHUE, Quang T. Tran, Eugene O'Neill, David J. Law, Paul J. Moran, Edele O'Malley, Jerome Nolan, Kam Choi, Maurice A. Goodfellow
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Patent number: 8213420Abstract: A network stack includes a plurality of network units each of which includes a multiplicity of ports for receiving and forwarding addressed data packets, at least two cascade ports and a switching engine for forwarding received packets to at least one port in accordance with address data in the packets and a cascade connection including, for each of two opposite directions around the stack, at least one unidirectional path for data packets composed of links each between a respective cascade port on a network unit and a corresponding cascade port on the next network unit.Type: GrantFiled: September 19, 2007Date of Patent: July 3, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Bryan J Donoghue, Quang T Tran, Eugene O'Neill, David J Law, Paul J Moran, Edele O'Malley, Jerome Nolan, Kam Choi, Maunte A Goodfellow
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Patent number: 7289496Abstract: Network units such as switches for use in a cascaded stack are organised to provide a cascade connection in the form of a dual unidirectional connection so that, in its ordinary configuration, there is at least one and preferably more than one unidirectional ring for each direction around the cascade, each ring including a respective port on each unit. For each ring, each port on a unit is connected by a respective link to a corresponding port on the preceding unit and the following unit. The units provide a self-healing operation in the event of various kinds of operational failure. The self-healing operation includes loop-back of packets in units adjacent the failure and bypass of a packet switching process for other units. The units include control logic for passing control frames containing status information relating to the units and links between them and for co-operation with a CPU to control a switching engine to perform the self-healing operation in accordance with that status information.Type: GrantFiled: February 8, 2002Date of Patent: October 30, 2007Assignee: 3Com CorporationInventors: Bryan J Donoghue, Quang T Tran, Eugene O'Neill, David J Law, Paul J Moran, Edele O'Malley, Jerome Nolan, Kam Choi, Maurice A Goodfellow
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Patent number: 7233601Abstract: A connecting unit for use in a system comprising a ‘stack’ of network communication units having a cascade connection has three ports having lines for forwarding and receiving data packets and for forwarding and receiving control messages. The connecting unit increments a first signal value defining an identification number received by way of a control message at a first port, provides the received signal value by way of a control message to the third port and provides the incremented signal value by way of a control message to the second port. The connecting unit also receives a second signal value defining an active unit count by way of a control message at the first port and provides the second signal value, incremented or not in dependence on a control message received at the third port, in a control message at the second port.Type: GrantFiled: September 14, 2000Date of Patent: June 19, 2007Assignee: 3Com CorporationInventors: Alan R. Poulter, Quang T Tran, Sharon L Wiles, David J Law, Paul J Moran, Christopher A Walker
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Patent number: 7062569Abstract: A control device for a unit in a cascade connection of network units includes control logic which increments a count of active units and passes the count to the next control device. The count is initiated and terminated by an absence of control messages at the down port and up port respectively. The incremented count is passed up the cascade and a final count is passed down the cascade.Type: GrantFiled: January 19, 2001Date of Patent: June 13, 2006Assignee: 3Com CorporationInventors: Alan R Poulter, Quang T Tran, Sharon L Wiles, David J Law, Christopher A Walker
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Publication number: 20030118021Abstract: Network units such as switches for use in a cascaded stack are organised to provide a cascade connection in the form of a dual unidirectional connection so that, in its ordinary configuration, there is at least one and preferably more than one unidirectional ring for each direction around the cascade, each ring including a respective port on each unit. For each ring, each port on a unit is connected by a respective link to a corresponding port on the preceding unit and the following unit. The units provide a self-healing operation in the event of various kinds of operational failure. The self-healing operation includes loop-back of packets in units adjacent the failure and bypass of a packet switching process for other units. The units include control logic for passing control frames containing status information relating to the units and links between them and for co-operation with a CPU to control a switching engine to perform the self-healing operation in accordance with that status information.Type: ApplicationFiled: February 8, 2002Publication date: June 26, 2003Inventors: Bryan J. Donoghue, Quang T. Tran, Eugene O'Neill, David J. Law, Paul J. Moran, Edele O'Malley, Jerome Nolan, Kam Choi, Maurice A. Goodfellow
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Patent number: 6428330Abstract: An extender for use in with a cascade stack of network devices comprises an electronic circuit which has three ports, and circuit connections coupling each of the three ports to each of the other two ports; port connectors for each port; a two-part housing of which a first part has an end wall apertured for the protrusion of a first and a second of the connectors and a second part has an end wall apertured for the protrusion of a third of the port connectors; and screw fixings for securing the housing parts together.Type: GrantFiled: September 5, 2001Date of Patent: August 6, 2002Assignee: 3Com CorporationInventors: Alan R Poulter, Richard N Bayfield, Paul J Moran, Quang T Tran, Sharon L Wiles, David Whitfield
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Publication number: 20020057683Abstract: A control device for a unit in a cascade connection of network units includes control logic which increments a count of active units and passes the count to the next control device. The count is initiated and terminated by an absence of control messages at the down port and up port respectively. The incremented count is passed up the cascade and a final count is passed down the cascade.Type: ApplicationFiled: January 19, 2001Publication date: May 16, 2002Inventors: Alan R. Poulter, Quang T. Tran, Sharon L. Wiles, David J. Law, Christopher A. Walker
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Patent number: D466095Type: GrantFiled: September 28, 2001Date of Patent: November 26, 2002Assignee: 3COM CorporationInventors: Alan R Poulter, Richard N Bayfield, Paul J Moran, Quang T Tran, Sharon L Wiles, David Whitfield