Patents by Inventor Thyagarajan Nandagopal

Thyagarajan Nandagopal 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: 8693361
    Abstract: Various methods and devices are provided to address the need for improved multicast operation. In one method, a mobile device receives a multicast packet from a station, the mobile device being one of a plurality of mobile devices that includes a group of feedback mobile devices. The mobile device transmits an indication that it is volunteering to become a member of the group of feedback mobile devices and determines whether to begin operating as a member of the group of feedback mobile devices. If the mobile device is to begin operating as a member of the group of feedback mobile devices, the mobile device transmits an indication of channel quality and/or a level of interference observed by the mobile device.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: April 8, 2014
    Assignee: Alcatel Lucent
    Inventors: Yigal Bejerano, Thyagarajan Nandagopal, Katherine H. Guo
  • Patent number: 8634329
    Abstract: A method is provided for enabling a base station to infer a compact topology graph among a set of mobile nodes in its cell, the mobile nodes having a secondary radio to enable inter-nodal communication. This methodology ensures that nodal membership information is gathered within approximately 100 ms, and additional topology information is gathered from all the mobile nodes within approximately 300 ms over Wi-Fi radios. In dense networks, this time can be reduced to within 100 ms.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: January 21, 2014
    Assignee: Alcatel Lucent
    Inventors: Yigal Bejerano, Thyagarajan Nandagopal, Katherine H. Guo
  • Patent number: 8542602
    Abstract: An enmeshed hierarchy of policers, different from traditional tree-based hierarchical system of policers is used in accordance with the present invention. A goal of using an enmeshed architecture of policing systems is to allow for a more complex set of policies to be defined across a network. Hierarchical/cascading systems ensure that the higher granularity assignments essentially dictate/constrain the behavior of finer grained assignments at higher levels for sub-flows. There is only one type of metric possible for the largest granular policer, so the only way to implement multiple system-wide metrics is to repeat the hierarchy multiple times over, which adds to the delay of the packet and the complexity of the router. In accordance with the enmeshed architecture of the present invention, multiple system-wide metrics can be implemented simultaneously, which allows for easier management of the various macro-level policies by the manager of an access network.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: September 24, 2013
    Assignee: Alcatel Lucent
    Inventors: Thyagarajan Nandagopal, Thomas Y Woo
  • Publication number: 20130247134
    Abstract: Various embodiments provide a method and apparatus of providing a distributed security service that runs light instances in a number of security devices and central instances of the security services in select security devices. A received or transmitted client content segment is directed to a light instance which either applies a security policy corresponding to the client content segment if the client content segment has been previously analyzed and has a valid security policy, or else, the light instance sends the client content segment to a central instance to be analyzed. The central instance may then provide a complete security analysis on the client content segment, determine a security policy corresponding to the client content segment and push the determined security policy to one or more of the light instances. Advantageously, a distributed security service delivery may provide highly secure, network efficient and cost effective security service delivery.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 19, 2013
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Krishna P. Puttaswamy Naga, Thyagarajan Nandagopal
  • Publication number: 20130208593
    Abstract: A method and apparatus controlling, either individually or in the aggregate, traffic flows associated with a plurality of queues by transmitting traffic source FlowON messages at first times selected to avoid queue underflow conditions, and traffic source FlowOFF message at second times selected to avoid queue overflow conditions, where the first and second times are determined as a function of delay time D of a link supporting the traffic source.
    Type: Application
    Filed: February 9, 2012
    Publication date: August 15, 2013
    Inventor: Thyagarajan Nandagopal
  • Publication number: 20130185257
    Abstract: An exemplary cloud data system includes a primary datacenter device that maintains a complete copy of a file. A plurality of secondary datacenter devices maintain respective encoded, partial copies of the file. At least some of the encoded partial copies are sufficient to recreate the complete copy of the file. The primary datacenter device makes any changes to the complete copy of the file responsive to any write operation on the file. The primary datacenter device provides correspondingly changed encoded partial copies to the respective secondary datacenter devices.
    Type: Application
    Filed: January 12, 2012
    Publication date: July 18, 2013
    Inventors: Krishna P. Puttaswamy Naga, Thyagarajan Nandagopal, Yadi Ma
  • Publication number: 20130185530
    Abstract: Various embodiments provide a method and apparatus of providing a frugal cloud file system that efficiently uses the blocks of different types of storage devices with different properties for different purposes. The efficient use of the different types of available storage devices reduces the storage and bandwidth overhead. Advantageously, the reduction in storage and bandwidth overhead achieved using the frugal cloud file system reduces the economic costs of running the file system while maintaining high performance.
    Type: Application
    Filed: January 12, 2012
    Publication date: July 18, 2013
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Krishna P. Puttaswamy Naga, Thyagarajan Nandagopal
  • Publication number: 20130185229
    Abstract: A data block storage management capability is presented. A cloud file system management capability manages storage of data blocks of a file system across multiple cloud storage services (e.g., including determining, for each data block to be stored, a storage location and a storage duration for the data block). A cloud file system management capability manages movement of data blocks of a file system between storage volumes of cloud storage services. A cloud file system management capability provides a probabilistic eviction scheme for evicting data blocks from storage volumes of cloud storage services in advance of storage deadlines by which the data blocks are to be removed from the storage volumes. A cloud file system management capability enables dynamic adaptation of the storage volume sizes of the storage volumes of the cloud storage services.
    Type: Application
    Filed: January 12, 2012
    Publication date: July 18, 2013
    Inventors: Krishna P. Puttaswamy Naga, Thyagarajan Nandagopal, Muralidharan S. Kodialam
  • Patent number: 8488571
    Abstract: The invention manages an IP address space in a mobility network, including partitioning of the IP address space, assignment of IP addresses from the IP address space, and/or use of hysteresis to control reassignment of IP addresses from the IP address space. The IP address assignment is performed using one or more residual time statistics from a residual time profile maintained for the mobile node requesting assignment of an IP address. A residual time profile of a mobile node includes one or more residual time statistics associated with the mobile node. The residual time statistics for a mobile node are determined using a residual time associated with each IP address assigned to the mobile node. The IP address space partitioning is performed using residual time statistics maintained for mobile nodes of the network. The reassignment of IP addresses from the IP address space is controlled using hysteresis.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: July 16, 2013
    Assignee: Alcatel Lucent
    Inventors: Thyagarajan Nandagopal, Thomas Y. Woo
  • Publication number: 20130174172
    Abstract: An exemplary data transfer manager includes a datacenter configured to communicate over at least one link and a scheduler that is configured to schedule a plurality of jobs for communicating data from the datacenter. The scheduler determines a minimum bandwidth requirement of each job and determines a maximum bandwidth limit of each job. The scheduler determines a flex parameter of each job. The flex parameter indicates how much a data transfer rate can vary between adjacent data transfer periods for the job.
    Type: Application
    Filed: December 28, 2011
    Publication date: July 4, 2013
    Inventors: Krishna P. Puttaswamy Naga, Thyagarajan Nandagopal
  • Patent number: 8432787
    Abstract: A SoftRouter architecture deconstructs routers by separating the control entities of a router from its forwarding components, enabling dynamic binding between them. In the SoftRouter architecture, control plane functions are aggregated and implemented on a few smart servers which control forwarding elements that are multiple network hops away. A dynamic binding protocol performs network-wide control plane failovers. Network stability is improved by aggregating and remotely hosting routing protocols, such as OSPF and BGP. This results in faster convergence, lower protocol messages processed, and fewer route changes following a failure. The SoftRouter architecture includes a few smart control entities that manage a large number of forwarding elements to provide greater support for network-wide control. In the SoftRouter architecture, routing protocols operate remotely at a control element and control one or more forwarding elements by downloading the forwarding tables, etc. into the forwarding elements.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: April 30, 2013
    Assignee: Alcatel Lucent
    Inventors: Furquan Ahmed Ansari, Martin Havemann, Tirunell V. Lakshman, Thyagarajan Nandagopal, Ramachandran Ramjee, Thomas Y. Woo
  • Publication number: 20130095862
    Abstract: At least one example embodiment discloses a paging message controller. The paging message controller includes a processor and an associated memory. The processor is configured to obtain an indication of a paging message for a user equipment (UE), the indication indicating that a paging message is to be forwarded to at least one destination cell of a first set of cells for paging the UE, and forward the paging message for paging the UE to at least one destination cell of a second set of cells in response to the indication.
    Type: Application
    Filed: October 13, 2011
    Publication date: April 18, 2013
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Yigal Bejerano, Katherine Guo, Thyagarajan Nandagopal
  • Publication number: 20130077525
    Abstract: Various methods and devices are provided to address the need for improved neighbor detection. In a first method, a node (e.g., a mobile node or a network transceiver node) transmits (401) a neighbor discovery message that indicates a time at which neighbor discovery signaling is to occur. Then during the neighbor discovery signaling time, the node receives (402) signaling indicating a signature of at least one neighbor node. In a second method, a neighbor node receives (501) a neighbor discovery message that indicates a time at which neighbor discovery signaling is to occur. Then during the neighbor discovery signaling time, the neighbor node transmits (502) a signature identifying itself.
    Type: Application
    Filed: September 28, 2011
    Publication date: March 28, 2013
    Inventors: Yigal Bejerano, Katherine Guo, Thyagarajan Nandagopal
  • Patent number: 8385206
    Abstract: An advance is made over the prior art in accordance with the principles of the present invention that is directed to a new approach for a system and method of Single Rate Three Color Marker (srTCM) and Two Rate Three Color Marker (trTCM) methodology. The invention eliminates deficiencies present in existing standards that allow a user to defeat the traffic meter that is used to ensure bandwidth usage is within limits imposed by the provider. Adoption of these invention will ensure compliance with the goals of an ideal Single Rate Three Color Marker (srTCM) and Two Rate Three Color Marker (trTCM) scheme.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: February 26, 2013
    Assignee: Alcatel Lucent
    Inventors: Thyagarajan Nandagopal, Thomas Y Woo
  • Publication number: 20130041753
    Abstract: A plurality of mappings corresponding to respective points of interest is generated. Each mapping indicates at least one group detected at the corresponding point of interest and respective times when each respective group among the at least one group was detected at the corresponding point of interest. A standard representation corresponding to a set of one or more groups appearing in a selected one of the plurality of mappings is defined. A path associated with the standard representation is determined, based on the plurality of mappings, the path defining a second plurality of points of interest at which the standard representation was detected and time information indicating when the standard representation was detected at each respective point of interest within the second plurality of points of interest. A point of interest may comprise a location associated with a billboard.
    Type: Application
    Filed: June 29, 2012
    Publication date: February 14, 2013
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Ajay Sathyanath, Thyagarajan Nandagopal
  • Publication number: 20120281520
    Abstract: A SoftRouter architecture deconstructs routers by separating the control entities of a router from its forwarding components, enabling dynamic binding between them. In the SoftRouter architecture, control plane functions are aggregated and implemented on a few smart servers which control forwarding elements that are multiple network hops away. A dynamic binding protocol performs network-wide control plane failovers. Network stability is improved by aggregating and remotely hosting routing protocols, such as OSPF and BGP. This results in faster convergence, lower protocol messages processed, and fewer route changes following a failure. The SoftRouter architecture includes a few smart control entities that manage a large number of forwarding elements to provide greater support for network-wide control. In the SoftRouter architecture, routing protocols operate remotely at a control element and control one or more forwarding elements by downloading the forwarding tables, etc. into the forwarding elements.
    Type: Application
    Filed: November 7, 2011
    Publication date: November 8, 2012
    Inventors: Furquan Ahmed Ansari, Martin Havemann, Tirunell V. Lakshman, Thyagarajan Nandagopal, Ramachandran Ramjee, Thomas Y. Woo
  • Patent number: 8299900
    Abstract: In one embodiment, a method for estimating the number of tags in a set of tags in a system of tags and readers. The method includes, during each of a plurality of time intervals: (i) transmitting a command requesting that each tag that receives the command determine whether to transmit a reply; and (ii) receiving, in one or more timeslots of a frame corresponding to the time interval, replies from one or more tags. The method further includes providing an estimate of the number of tags in the set of one or more tags based on (i) timeslots in each of the plurality of time intervals that are zero timeslots, i.e., timeslots having no received reply, and (ii) the total number of timeslots in each frame.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: October 30, 2012
    Assignee: Alcatel Lucent
    Inventors: Muralidharan S. Kodialam, Wing Cheong Lau, Thyagarajan Nandagopal
  • Patent number: 8280928
    Abstract: A method for creating a multi-level enmeshed structure is provided. The multi-level enmeshed directory structure of the present embodiments contain objects described by multiple object descriptors, which can be thought of as tags. Each object can be accessed by any one of the descriptors that describe the object and the descriptors of an object are also accessible.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: October 2, 2012
    Assignee: Alcatel Lucent
    Inventors: Thyagarajan Nandagopal, Thomas Y. Woo
  • Publication number: 20120213097
    Abstract: Various methods and devices are provided to address the need for improved multicast operation. In one method, a mobile device receives a multicast packet from a station, the mobile device being one of a plurality of mobile devices that includes a group of feedback mobile devices. The mobile device transmits an indication that it is volunteering to become a member of the group of feedback mobile devices and determines whether to begin operating as a member of the group of feedback mobile devices. If the mobile device is to begin operating as a member of the group of feedback mobile devices, the mobile device transmits an indication of channel quality and/or a level of interference observed by the mobile device.
    Type: Application
    Filed: February 21, 2011
    Publication date: August 23, 2012
    Inventors: Yigal Bejerano, Thyagarajan Nandagopal, Katherine H. Guo
  • Patent number: 8238314
    Abstract: The invention includes a method and apparatus for providing a distributed forwarding plane for a mobility home agent. The invention provides a method for controlling routing of packets for a mobile node in a network comprising a network domain including a plurality of forwarding elements being controlled by a control element. A method includes computing a route from one of the forwarding elements toward the mobile node and propagating the computed route toward that one of the forwarding elements. The route is computed using location information associated with the mobile node and routing information associated with the network domain.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: August 7, 2012
    Assignee: Alcatel Lucent
    Inventors: Thyagarajan Nandagopal, Thomas Y. Woo