Patents by Inventor Xiaohong Pan

Xiaohong Pan 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).

  • Patent number: 8199641
    Abstract: A network monitoring system includes devices receiving network traffic information, and generating at least partial results relating to network symptoms. Those partial results are forwarded to devices processing those partial results and generating information relating to problems in response to those symptoms. Problems are reported to users or sent as notifications. In one embodiment, information relating to network traffic is monitored both by a first set of devices associated with source addresses for that network traffic and a second set of devices associated with destination addresses for that network traffic. Information received by that first set of devices includes information relating to both the source address and destination address of network traffic. That first set of devices processes information relating to the source address of network traffic and forwards information relating to the destination address of network traffic to that second set of devices.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: June 12, 2012
    Assignee: Xangati, Inc.
    Inventors: Rangaswamy Jagannathan, Rosanna Lee, Derek Sanders, Xiaohong Pan, Kishor Kakatkar
  • Patent number: 8014409
    Abstract: A virtual router spans a number of physical routing devices. One of the physical routing devices is designated as master, and the other physical routing devices are designated as backups to the master. The virtual router may be situated between a first local area network and a second local area network. A virtual router identifier can be associated with multiple interfaces on each of the physical routing devices.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: September 6, 2011
    Assignee: Foundry Networks, LLC
    Inventor: Xiaohong Pan
  • Publication number: 20110211442
    Abstract: A virtual router spans a number of physical routing devices. A set of physical ports on one of the physical routing devices is logically represented as a trunk. A respective port priority value is associated with each of those ports, and a device priority value is associated with the physical routing device. If a port in the trunk is out-of-service, then the device priority value can be adjusted by the port priority value associated with the out-of-service port. A corrective action can be implemented if the device priority value fails to satisfy a condition. For example, the physical routing device may failover to another one of the physical routing devices spanned by the virtual router.
    Type: Application
    Filed: April 27, 2011
    Publication date: September 1, 2011
    Inventors: David CHEUNG, Xiaohong PAN
  • Publication number: 20110176410
    Abstract: A virtual router spans a number of physical routing devices. One of the physical routing devices is designated as master, and the other physical routing devices are designated as backups to the master. A failover protocol that includes both a non-dampened state and a dampened state can be implemented. According to the failover protocol, an attempt to designate one of the backups as master in place of the current master is permitted while the virtual router is in the non-dampened state, while such an attempt is suppressed while the virtual router is in the dampened state.
    Type: Application
    Filed: March 30, 2011
    Publication date: July 21, 2011
    Inventor: Xiaohong PAN
  • Patent number: 7936666
    Abstract: A virtual router spans a number of physical routing devices. A set of physical ports on one of the physical routing devices is logically represented as a trunk. A respective port priority value is associated with each of those ports, and a device priority value is associated with the physical routing device. If a port in the trunk is out-of-service, then the device priority value can be adjusted by the port priority value associated with the out-of-service port. A corrective action can be implemented if the device priority value fails to satisfy a condition. For example, the physical routing device may failover to another one of the physical routing devices spanned by the virtual router.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: May 3, 2011
    Assignee: Foundry Networks, LLC
    Inventors: David Cheung, Xiaohong Pan
  • Patent number: 7933198
    Abstract: A virtual router spans a number of physical routing devices. One of the physical routing devices is designated as master, and the other physical routing devices are designated as backups to the master. A failover protocol that includes both a non-dampened state and a dampened state can be implemented. According to the failover protocol, an attempt to designate one of the backups as master in place of the current master is permitted while the virtual router is in the non-dampened state, while such an attempt is suppressed while the virtual router is in the dampened state.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: April 26, 2011
    Assignee: Foundry Networks, LLC
    Inventor: Xiaohong Pan
  • Publication number: 20100149980
    Abstract: A virtual router spans a number of physical routing devices. A set of physical ports on one of the physical routing devices is logically represented as a trunk. A respective port priority value is associated with each of those ports, and a device priority value is associated with the physical routing device. If a port in the trunk is out-of-service, then the device priority value can be adjusted by the port priority value associated with the out-of-service port. A corrective action can be implemented if the device priority value fails to satisfy a condition. For example, the physical routing device may failover to another one of the physical routing devices spanned by the virtual router.
    Type: Application
    Filed: April 18, 2008
    Publication date: June 17, 2010
    Inventors: David Cheung, Xiaohong Pan
  • Publication number: 20070099931
    Abstract: The invention relates to, for example, novel formulations and methods for the delivery of 4-cyano-N-{(2R)—2-[4-(2,3-dihydro-benzo[1,4]dioxin-5-yl)-piperazin-1-yl]-propyl}-N-pyridin-2-yl-benzamide, pharmaceutically acceptable salts thereof, structurally related compounds and/or metabolites; as well as to use of these formulations and methods for treating disease.
    Type: Application
    Filed: September 6, 2006
    Publication date: May 3, 2007
    Applicant: Wyeth
    Inventors: Krishnendu Ghosh, Arwinder Nagi, Xiaohong Pan, Melissa Lin, Leonid Linberg, Ping Cai, Eric Browne, Michel Bernatchez, Mark Lankau, Sangeeta Raje
  • Publication number: 20050215561
    Abstract: This invention relates to, for example, novel formulations and methods for the delivery of 4-cyano-N-{(2R)-2-[4-(2,3-dihydro-benzo[1,4]dioxin-5yl)-piperazin-1-yl]-propyl}-N-pyridin-2-yl-benzamide, pharmaceutically acceptable salts thereof, structurally related compounds and/or metabolites; as well as to use of these formulations and methods for treating disease.
    Type: Application
    Filed: March 17, 2005
    Publication date: September 29, 2005
    Inventors: Krishnendu Ghosh, Arwinder Nagi, Xiaohong Pan, Melissa Lin, Leonid Linberg, Ping Cai, Eric Browne, Michel Bernatchez, Mark Lankau