Patents by Inventor Christine Andiazabal

Christine Andiazabal 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: 9137663
    Abstract: In one embodiment, a method includes identifying, responsive to a triggering event, one or more radio frequency (RF) firewall transceivers that neighbor a data wireless access point to which a given wireless client is communicating; configuring one or more of the identified neighboring RF firewall transceivers to detect RF frames transmitted by the wireless client; causing the data wireless access point to transmit one or more wireless messages operative to cause the wireless client to transmit RF frames; collecting RF signal data corresponding to the RF frames transduced by one or more of the identified neighboring RF firewall transceivers; transmitting the collected RF signal data to a location system; receiving from the location system an indication of the location of the wireless client; and applying one or more network access policies based on the indication of the location.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: September 15, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Allan Thomson, Brian Donald Hart, Mark Paul Yankowski, Christine Andiazabal, Timothy S. Olson
  • Patent number: 8422467
    Abstract: Methods and apparatus for enabling mobility of a node that does not support Mobile IP are disclosed. When an AP receives a data packet, the AP may compare the data packet (e.g., source address) with the AP information for one or more APs to determine whether to send a registration request on behalf of the node. More particularly, the AP determines from the source address whether the node is located on a subnet identical to a subnet of the AP. If the node is located on the subnet of the AP, no Mobile IP service is required on behalf of the node. However, when it is determined from the source address that the node is not located on the subnet identical to the subnet of the Access Point, the AP composes and sends a mobile IP registration request on behalf of the node. For instance, the mobile IP registration request may be composed using the gateway associated with the “home” AP (e.g., having a matching subnet) as the node's Home Agent.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: April 16, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Huizhao Wang, Kent K. Leung, Waseem A. Siddiqi, Christine Andiazabal
  • Publication number: 20090080399
    Abstract: Methods and apparatus for enabling mobility of a node that does not support Mobile IP are disclosed. When an AP receives a data packet, the AP may compare the data packet (e.g., source address) with the AP information for one or more APs to determine whether to send a registration request on behalf of the node. More particularly, the AP determines from the source address whether the node is located on a subnet identical to a subnet of the AP. If the node is located on the subnet of the AP, no Mobile IP service is required on behalf of the node. However, when it is determined from the source address that the node is not located on the subnet identical to the subnet of the Access Point, the AP composes and sends a mobile IP registration request on behalf of the node. For instance, the mobile IP registration request may be composed using the gateway associated with the “home” AP (e.g., having a matching subnet) as the node's Home Agent.
    Type: Application
    Filed: November 25, 2008
    Publication date: March 26, 2009
    Applicant: Cisco Technology, Inc., A corporation of California
    Inventors: Huizhao Wang, Kent K. Leung, Waseem A. Siddiqi, Christine Andiazabal
  • Patent number: 7471661
    Abstract: Methods and apparatus for enabling mobility of a node that does not support Mobile IP are disclosed. Access point information is maintained for all functioning access points. In accordance with one embodiment, an authoritative access point (AAP) maintains access point information for all functioning access points (APs) and sends updates for all additions or other modifications to the continually changing access point information to enable APs to store a local copy of the AP information. For instance, when an AP goes offline, the access point information for that AP will be removed from the set of access point information, and notification of this removal is sent to other APs so that the local copy of the AP information may be similarly updated. As another example, when an AP comes online, it will send its AP information to the AAP. The AAP will store the AP information and provide this new AP information to other “active” APs. The AP information preferably includes an AP subnet and a gateway.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: December 30, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Huizhao Wang, Kent K. Leung, Waseem A. Siddiqi, Christine Andiazabal
  • Publication number: 20080107090
    Abstract: In one embodiment, a method includes identifying, responsive to a triggering event, one or more radio frequency (RF) firewall transceivers that neighbor a data wireless access point to which a given wireless client is communicating; configuring one or more of the identified neighboring RF firewall transceivers to detect RF frames transmitted by the wireless client; causing the data wireless access point to transmit one or more wireless messages operative to cause the wireless client to transmit RF frames; collecting RF signal data corresponding to the RF frames transduced by one or more of the identified neighboring RF firewall transceivers; transmitting the collected RF signal data to a location system; receiving from the location system an indication of the location of the wireless client; and applying one or more network access policies based on the indication of the location.
    Type: Application
    Filed: November 2, 2006
    Publication date: May 8, 2008
    Applicant: Cisco Technology, Inc.
    Inventors: Allan Thomson, Brian Donald Hart, Mark Paul Yankowski, Christine Andiazabal, Timothy S. Olsen