Patents by Inventor Narayanan Natarajan
Narayanan Natarajan 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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Publication number: 20140266832Abstract: Described are apparatuses and methods of current balancing, current sensing and phase balancing, offset cancellation, digital to analog current converter with monotonic output using binary coded input (without binary to thermometer decoder), compensator for a voltage regulator (VR), etc. In one example, apparatus comprises: a plurality of inductors coupled to a capacitor and a load; a plurality of bridges, each of which is coupled to a corresponding inductor from the plurality of inductors; and a plurality of current sensors, each of which is coupled to a bridge to sense current through a transistor of the bridge.Type: ApplicationFiled: June 28, 2013Publication date: September 18, 2014Inventors: Gerhard SCHROM, J. Keith HODGSON, Alexander LYAKHOV, Chiu Keung TANG, Narayanan RAGHURAMAN, Narayanan NATARAJAN
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Patent number: 8780928Abstract: In Low Earth Orbit (LEO) satellite networks data routes for point to point and point to multipoint communication sessions in LEO satellite networks are determined by considering session bandwidth, priority, and the constantly changing terminal-satellite and satellite-satellite connectivity. Multiple routes are computed for a session to facilitate automatic adaptive rerouting by satellite payloads when they encounter network failures or congestion conditions.Type: GrantFiled: October 4, 2011Date of Patent: July 15, 2014Assignee: Telcordia Technologies, Inc.Inventors: Narayanan Natarajan, Anindo Bagchi, William E. Stephens
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Publication number: 20140173317Abstract: Described is a processor comprising: a plurality of transistors operable to provide dynamically adjustable transistor size, the plurality of transistors coupled at one end to a first power supply and coupled at another end to a second power supply; a circuit coupled to the second power supply, the second power supply to provide power to the circuit; and a power control unit (PCU) to monitor the level of the first power supply, and to dynamically adjust the transistor size of the plurality of transistors so that the second power supply is adjusted to keep the circuit operational.Type: ApplicationFiled: December 14, 2012Publication date: June 19, 2014Inventors: Gururaj K. Shamanna, Stefan Rusu, Phani Kumar Kandula, Sankalan Prasad, Mandar R. Ranade, Narayanan Natarajan, Tessil Thomas
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Patent number: 8730864Abstract: A payload switching architecture for LEO satellite networks minimizes processing and storage requirements of payloads for deployment as small primary or secondary payloads, payloads perform only forwarding functions. Forwarding rules are provisioned in the payloads enabling them to reroute in case of failures or congestion without intervention from a ground station. Configuration rules are provisioned in the payloads enabling them to dynamically establish and remove interplane crosslinks without intervention from a ground station. The central network operations center on the ground computes forwarding rules and configuration rules for payloads and uploads the rules to the payloads.Type: GrantFiled: May 31, 2011Date of Patent: May 20, 2014Assignee: Telcordia Technologies, Inc.Inventors: Narayanan Natarajan, Anindo Bagchi, William E. Stephens
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Patent number: 8644323Abstract: In a distributed management scheme for LEO satellite networks interactions between a satellite and the designated fixed center occur according to a time schedule and only when the designated center is in the coverage area of the payload. For exception/alarm reporting and real-time configuration updates the interaction varies with time. Interactions of this type occur between a satellite and the management center that is “nearest” to the payload or satellite at the time instant at which the network event occurs or configuration upload is needed. The nearest management center for a payload is the center that can be reached from the payload with fewest number of crosslink hops. A central network operation center determines, prior to payload launch, the association between satellites and management centers for routine information exchange, and the nearest management center for the payload for different snapshots of time.Type: GrantFiled: February 7, 2012Date of Patent: February 4, 2014Assignee: Telcordia Technologies, Inc.Inventors: Narayanan Natarajan, Anindo Bagchi, William Edward Stephens, Stephen Leanheart
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Publication number: 20140016652Abstract: At least one substitute path is provided in place of a plurality of existing paths of a network to reallocate traffic carried by the plurality of existing paths. The total bandwidth needed to carry the traffic of the plurality of existing paths is determined. A proposed route is generated from the available links in the network. A portion of the bandwidth of a proposed route may be allocated to the needed bandwidth when the bandwidth of a proposed route is greater than or equal to the needed bandwidth. When the bandwidth of the proposed route is less than the needed bandwidth, at least one further route is generated, and the needed bandwidth is divided among the proposed route and the at least one further route such that a minimum number of further routes are generated.Type: ApplicationFiled: September 18, 2013Publication date: January 16, 2014Applicant: MOSAID Technologies IncorporatedInventors: Abdelhakim HAFID, Narayanan NATARAJAN, Shrirang GADGIL
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Patent number: 8547827Abstract: At least one substitute path is provided in place of a plurality of existing paths of a network to reallocate traffic carried by the plurality of existing paths. The total bandwidth needed to carry the traffic of the plurality of existing paths is determined. A proposed route is generated from the available links in the network. A portion of the bandwidth of a proposed route may be allocated to the needed bandwidth when the bandwidth of a proposed route is greater than or equal to the needed bandwidth. When the bandwidth of the proposed route is less than the needed bandwidth, at least one further route is generated, and the needed bandwidth is divided among the proposed route and the at least one further route such that a minimum number of further routes are generated.Type: GrantFiled: April 17, 2012Date of Patent: October 1, 2013Assignee: MOSAID Technologies IncorporatedInventors: Abdelhakim Hafid, Narayanan Natarajan, Shrirang Gadgil
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Patent number: 8397065Abstract: Methods and systems for information dissemination in mobile ad hoc networks founded on Content Based Routing. The method comprises encoding, via an encoding logic within the source node, a plurality of information categories associated with the content in a header of the packet, encrypting the packet with an encryption key unique to the plurality of information categories, with the encrypted packet having a unique dissemination group identity in its header, and disseminating the encrypted packet to nodes that have subscribed to the data based on the dissemination group identity. The system comprises a host within the source node, an identity generator to generate the dissemination group identity for the content, an encryption unit for encrypting the content, and a routing unit to disseminate the content to the dissemination mesh based on established subscriptions.Type: GrantFiled: October 17, 2008Date of Patent: March 12, 2013Assignee: Telcordia Technologies, Inc.Inventors: Yow-Jian Lin, Narayanan Natarajan
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Publication number: 20130039264Abstract: In a distributed management scheme for LEO satellite networks interactions between a satellite and the designated fixed center occur according to a time schedule and only when the designated center is in the coverage area of the payload. For exception/alarm reporting and real-time configuration updates the interaction varies with time. Interactions of this type occur between a satellite and the management center that is “nearest” to the payload or satellite at the time instant at which the network event occurs or configuration upload is needed. The nearest management center for a payload is the center that can be reached from the payload with fewest number of crosslink hops. A central network operation center determines, prior to payload launch, the association between satellites and management centers for routine information exchange, and the nearest management center for the payload for different snapshots of time.Type: ApplicationFiled: February 7, 2012Publication date: February 14, 2013Applicant: TELCORDIA TECHNOLOGIES, INC.Inventors: Narayanan Natarajan, Anindo Bagchi, William Edward Stephens, Stephen Leanheart
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Publication number: 20130010791Abstract: A system and method for determining an efficient assignment of information categories to multicast addresses is described. In one embodiment, the assignment takes into account the overlapping information needs of the subscriber nodes and the network bandwidth that will be consumed in the dissemination of each information category based on its size and the frequency of dissemination. In another embodiment, the assignment takes into consideration the additional constraint of a quality of service network having different prioritizations associated with the information categories.Type: ApplicationFiled: September 13, 2012Publication date: January 10, 2013Applicant: TELCORDIA TECHNOLOGIES, INC.Inventors: Shobha Erramilli, Shrirang Gadgil, Narayanan Natarajan
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Patent number: 8301744Abstract: Systems and methods for efficiently provisioning and assuring Quality of Service (QoS) between user networks communicating over a DiffServ-enabled network, with QoS management transparency to SIP user agents. The system comprises user networks communicating via a core network, each user network having a source and destination SIP user agent respectively, a SIP proxy server between the source SIP user agent and destination SIP user agent, a Bandwidth Manager to provision a pipe between the source user network and the destination user network, wherein the pipe has a specified bandwidth, and a QoS Agent for accepting and/or rejecting a SIP session based on availability of bandwidth in the pipe; wherein the SIP proxy server is configured to forward an incoming SIP request to the QoS Agent. The method comprises provisioning a pipe between the SIP user agents or their respective user networks, and allowing/rejecting incoming SIP sessions based on the available bandwidth in the pipe.Type: GrantFiled: August 8, 2008Date of Patent: October 30, 2012Assignee: Telcordia Technologies, Inc.Inventors: Tony Bogovic, Shrirang Gadgil, Gi Tae Kim, Narayanan Natarajan, Abdelhakim Hafid
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Publication number: 20120263042Abstract: In Low Earth Orbit (LEO) satellite networks data routes for point to point and point to multipoint communication sessions in LEO satellite networks are determined by considering session bandwidth, priority, and the constantly changing terminal-satellite and satellite-satellite connectivity. Multiple routes are computed for a session to facilitate automatic adaptive rerouting by satellite payloads when they encounter network failures or congestion conditions.Type: ApplicationFiled: October 4, 2011Publication date: October 18, 2012Applicant: TELCORDIA TECHNOLOGIES, INC.Inventors: Narayanan Natarajan, Anindo Bagchi, William E. Stephens
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Patent number: 8289872Abstract: A system and method for determining an efficient assignment of information categories to multicast addresses is described. In one embodiment, the assignment takes into account the overlapping info cation needs of the subscriber nodes and the network bandwidth that will be consumed in the dissemination of each information category based on its size and the frequency of dissemination. In another embodiment, the assignment takes into consideration the additional constraint of a quality of service network having different prioritizations associated with the information categories.Type: GrantFiled: October 22, 2009Date of Patent: October 16, 2012Assignee: Telcordia Technologies, Inc.Inventors: Shobha Erramilli, Shrirang Gadgil, Narayanan Natarajan
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Publication number: 20120201132Abstract: At least one substitute path is provided in place of a plurality of existing paths of a network to reallocate traffic carried by the plurality of existing paths. The total bandwidth needed to carry the traffic of the plurality of existing paths is determined. A proposed route is generated from the available links in the network. A portion of the bandwidth of a proposed route may be allocated to the needed bandwidth when the bandwidth of a proposed route is greater than or equal to the needed bandwidth. When the bandwidth of the proposed route is less than the needed bandwidth, at least one further route is generated, and the needed bandwidth is divided among the proposed route and the at least one further route such that a minimum number of further routes are generated.Type: ApplicationFiled: April 17, 2012Publication date: August 9, 2012Applicant: MOSAID TECHNOLOGIES INCORPORATEDInventors: Abdelhakim HAFID, Narayanan NATARAJAN, Shrirang GADGIL
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Publication number: 20120134261Abstract: A payload switching architecture for LEO satellite networks minimizes processing and storage requirements of payloads for deployment as small primary or secondary payloads, payloads perform only forwarding functions. Forwarding rules are provisioned in the payloads enabling them to reroute in case of failures or congestion without intervention from a ground station. Configuration rules are provisioned in the payloads enabling them to dynamically establish and remove interplane crosslinks without intervention from a ground station. The central network operations center on the ground computes forwarding rules and configuration rules for payloads and uploads the rules to the payloads.Type: ApplicationFiled: May 31, 2011Publication date: May 31, 2012Applicant: TELCORDIA TECHNOLOGIES, INC.Inventors: Narayanan Natarajan, Anindo Bagchi, William E. Stephens
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Patent number: 8179786Abstract: At least one substitute path is provided in place of a plurality of existing paths of a network to reallocate traffic carried by the plurality of existing paths. The total bandwidth needed to carry the traffic of the plurality of existing paths is determined. A proposed route is generated from the available links in the network. A portion of the bandwidth of a proposed route may be allocated to the needed bandwidth when the bandwidth of a proposed route is greater than or equal to the needed bandwidth. When the bandwidth of the proposed route is less than the needed bandwidth, at least one further route is generated, and the needed bandwidth is divided among the proposed route and the at least one further route such that a minimum number of further routes are generated.Type: GrantFiled: January 31, 2005Date of Patent: May 15, 2012Assignee: MOSAID Technologies IncorporatedInventors: Abdelhakim Hafid, Narayanan Natarajan, Shrirang Gadgil
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Patent number: 7965620Abstract: In one aspect a method for correlating network events in a network comprises correlating the events relating to paths with events relating to links traversed by paths. In another aspect, the method includes correlating the events based on whether paths traversing the network share network resources, such as links. Preferably, the method is implemented in a network where paths traversing the network change dynamically in response to other network events and based on traffic engineering priorities.Type: GrantFiled: May 25, 2004Date of Patent: June 21, 2011Assignee: Telcordia Licensing Company, LLCInventors: Shrirang Gadgil, Narayanan Natarajan
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Publication number: 20110131411Abstract: The present invention describes methods and systems for information dissemination in mobile ad hoc networks founded on Content Based Routing. The method comprises generating a first data packet at a source node, encoding, via an encoding logic within the source node, a plurality of information categories associated with the first data packet in a header of the first data packet, encrypting the first data packet with an encryption key unique to the plurality of information categories, generating a second data packet having a unique dissemination group identity in its header and the encrypted first data packet as a payload of the second data packet, disseminating the second data packet across a dissemination mesh, and receiving the second data packet at a destination node.Type: ApplicationFiled: October 17, 2008Publication date: June 2, 2011Applicant: Telcordia Technologies, Inc.Inventors: Yow-Jian Lin, Narayanan Natarajan
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Publication number: 20110026398Abstract: A system and method of rearranging Label Switched Paths (LSPs) and rerouting traffic in a DiffServ-enabled Multi-Protocol Label Switched (MPLS) network is disclosed. The system periodically monitors network performance, and rearranges LSPs and reroutes traffic through existing or new Label Switched Paths (LSPs) based on network performance and network bandwidth utilized by various DiffServ classes.Type: ApplicationFiled: October 12, 2010Publication date: February 3, 2011Applicant: TELCORDIA TECHNOLOGIES, INC.Inventors: Narayanan Natarajan, Abdelhakim Hafid
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Publication number: 20110019672Abstract: A system and method for determining an efficient assignment of information categories to multicast addresses is described. In one embodiment, the assignment takes into account the overlapping info cation needs of the subscriber nodes and the network bandwidth that will be consumed in the dissemination of each information category based on its size and the frequency of dissemination. In another embodiment, the assignment takes into consideration the additional constraint of a quality of service network having different prioritizations associated with the information categories.Type: ApplicationFiled: October 22, 2009Publication date: January 27, 2011Applicant: TELCORDIA TECHNOLOGIES, INC.Inventors: Shobha Erramilli, Shrirang Gadgil, Narayanan Natarajan