Patents by Inventor Ramanan Vaidyanathan

Ramanan Vaidyanathan 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: 11891047
    Abstract: A method for having a vehicle follow a desired curvature path is provided. The vehicle has at least one differential with a differential lock connected to at least one driven wheel axle of the vehicle. The method includes providing information regarding state of the differential lock, the state being either that the differential lock is activated or unlocked, and when the differential lock is activated, calculating a yaw moment of the vehicle caused by the differential lock; and compensating for a deviation from the desired curvature path caused by the yaw moment such that a resulting steering angle is equal to or less than a maximum allowed steering angle of the vehicle. The compensation is a feed forward compensation.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: February 6, 2024
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Leo Laine, Karthik Ramanan Vaidyanathan
  • Patent number: 11691609
    Abstract: A control arrangement for a vehicle motion system including a braking function, comprising motion actuators with one or more brake actuators pertaining to the braking function, a first vehicle motion management controller (VMM1) and a second vehicle motion management controller (VMM2), forming a redundant assembly to control the braking function, wherein, in riding conditions, the first vehicle motion management controller controls the brake actuators with a current nominal expected braking performance, while the second vehicle motion management controller (VMM2) is in a waiting-to-operate mode, the control arrangement comprising a hot swap functionality in which the second vehicle motion management controller (VMM2) is configured to take over control of the brake actuators from the first vehicle motion management controller, with the current nominal expected braking performance, in a short time period (SWT) less than one second, preferably less than 0.5 second, preferably less than 0.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: July 4, 2023
    Assignee: Volvo Truck Corporation
    Inventors: Leo Laine, Lionel Farres, Christian Oscarsson, Leon Henderson, Johanna Majqvist, Jose Vilca, Kristoffer Tagesson, Karthik Ramanan Vaidyanathan, Nicolas Soulier
  • Publication number: 20210387613
    Abstract: The present invention relates to a method for having a vehicle (100) follow a desired curvature path (C1), said vehicle (100) comprising at least one differential (10, 20, 30) with a differential lock connected to at least one driven wheel axle (40, 50) of said vehicle (100), said method comprising at least the following steps: —providing (S1) information regarding state of said differential lock, said state being either that said differential lock is activated or unlocked, and when said differential lock is activated: —calculating (S2) a yaw moment, Mdiff, of said vehicle (100), caused by said differential lock; and —compensating (S3) for a deviation from said desired curvature path (C1) caused by said yaw moment, Mdiff, such that a resulting steering angle is equal to or less than a maximum allowed steering angle of said vehicle (100), whereby said compensation is a feed forward compensation. The invention also relates to a control unit, a vehicle, a computer program and a computer readable medium.
    Type: Application
    Filed: October 22, 2018
    Publication date: December 16, 2021
    Applicant: VOLVO TRUCK CORPORATION
    Inventors: Leo LAINE, Karthik Ramanan VAIDYANATHAN
  • Publication number: 20210367843
    Abstract: The subject disclosure relates to systems and methods for improving multicast traffic flows in a computer network. In some aspects, a method of the technology includes steps for receiving multicast traffic statistics from each of a plurality of switches in a computer network, aggregating the multicast traffic statistics into a time-series database, and identifying a low-performing multicast flow based on the time-series database. In some aspects, the method can include steps for automatically reconfiguring the computer network to improve the low-performing multicast flow. Systems and machine readable media are also provided.
    Type: Application
    Filed: August 3, 2021
    Publication date: November 25, 2021
    Inventors: Laura Sharpless, Ramanan Vaidyanathan, Keerthi Manjunathan Swarnamanjunathan
  • Patent number: 11102065
    Abstract: The subject disclosure relates to systems and methods for improving multicast traffic flows in a computer network. In some aspects, a method of the technology includes steps for receiving multicast traffic statistics from each of a plurality of switches in a computer network, aggregating the multicast traffic statistics into a time-series database, and identifying a low-performing multicast flow based on the time-series database. In some aspects, the method can include steps for automatically reconfiguring the computer network to improve the low-performing multicast flow. Systems and machine readable media are also provided.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: August 24, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Laura Sharpless, Ramanan Vaidyanathan, Keerthi Manjunathan Swarnamanjunathan
  • Publication number: 20210078556
    Abstract: A control arrangement for a vehicle motion system including a braking function, comprising motion actuators with one or more brake actuators pertaining to the braking function, a first vehicle motion management controller (VMM1) and a second vehicle motion management controller (VMM2), forming a redundant assembly to control the braking function, wherein, in riding conditions, the first vehicle motion management controller controls the brake actuators with a current nominal expected braking performance, while the second vehicle motion management controller (VMM2) is in a waiting-to-operate mode, the control arrangement comprising a hot swap functionality in which the second vehicle motion management controller (VMM2) is configured to take over control of the brake actuators from the first vehicle motion management controller, with the current nominal expected braking performance, in a short time period (SWT) less than one second, preferably less than 0.5 second, preferably less than 0.
    Type: Application
    Filed: May 3, 2018
    Publication date: March 18, 2021
    Inventors: Leo Laine, Lionel Farres, Christian Oscarsson, Leon Henderson, Johanna Majqvist, Jose Vilca, Kristoffer Tagesson, Karthik Ramanan Vaidyanathan, Nicolas Soulier
  • Publication number: 20200112481
    Abstract: The subject disclosure relates to systems and methods for improving multicast traffic flows in a computer network. In some aspects, a method of the technology includes steps for receiving multicast traffic statistics from each of a plurality of switches in a computer network, aggregating the multicast traffic statistics into a time-series database, and identifying a low-performing multicast flow based on the time-series database. In some aspects, the method can include steps for automatically reconfiguring the computer network to improve the low-performing multicast flow. Systems and machine readable media are also provided.
    Type: Application
    Filed: December 12, 2019
    Publication date: April 9, 2020
    Inventors: Laura Sharpless, Ramanan Vaidyanathan, Keerthi Manjunathan Swarnamanjunathan
  • Patent number: 10541866
    Abstract: The subject disclosure relates to systems and methods for improving multicast traffic flows in a computer network. In some aspects, a method of the technology includes steps for receiving multicast traffic statistics from each of a plurality of switches in a computer network, aggregating the multicast traffic statistics into a time-series database, and identifying a low-performing multicast flow based on the time-series database. In some aspects, the method can include steps for automatically reconfiguring the computer network to improve the low-performing multicast flow. Systems and machine readable media are also provided.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: January 21, 2020
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Laura Sharpless, Ramanan Vaidyanathan, Keerthi Manjunathan Swarnamanjunathan
  • Publication number: 20190036771
    Abstract: The subject disclosure relates to systems and methods for improving multicast traffic flows in a computer network. In some aspects, a method of the technology includes steps for receiving multicast traffic statistics from each of a plurality of switches in a computer network, aggregating the multicast traffic statistics into a time-series database, and identifying a low-performing multicast flow based on the time-series database. In some aspects, the method can include steps for automatically reconfiguring the computer network to improve the low-performing multicast flow. Systems and machine readable media are also provided.
    Type: Application
    Filed: July 25, 2017
    Publication date: January 31, 2019
    Inventors: Laura Sharpless, Ramanan Vaidyanathan, Keerthi Manjunathan Swarnamanjunathan
  • Patent number: 10142168
    Abstract: Systems, methods, and computer-readable media for improving debugging and troubleshooting of datacenter networks, and more particularly improving the speed of forwarding/data path related problems without going into ASIC level debugging. A switch could, for example, have a processor which communicates with an ASIC. The processor can receive flow information and a notification from the ASIC, the notification indicating a predefined error condition has been identified in a packet. The processor can modify the ASIC programming based on the notification, such that the ASIC records additional, more-detailed, flow information for the switch. The processor can then receive, from the modified ASIC, the additional flow information. The additional flow information can then be used (either by the processor or by an operator) to identify the exact reason for the errors in the flow path.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: November 27, 2018
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Ramanan Vaidyanathan, Ajay Modi, Azeem Suleman, Krishna Doddapaneni, Sarang Dharmapurikar, Ganlin Wu
  • Publication number: 20180034686
    Abstract: Systems, methods, and computer-readable media for improving debugging and troubleshooting of datacenter networks, and more particularly improving the speed of forwarding/data path related problems without going into ASIC level debugging. A switch could, for example, have a processor which communicates with an ASIC. The processor can receive flow information and a notification from the ASIC, the notification indicating a predefined error condition has been identified in a packet. The processor can modify the ASIC programming based on the notification, such that the ASIC records additional, more-detailed, flow information for the switch. The processor can then receive, from the modified ASIC, the additional flow information. The additional flow information can then be used (either by the processor or by an operator) to identify the exact reason for the errors in the flow path.
    Type: Application
    Filed: July 27, 2016
    Publication date: February 1, 2018
    Inventors: Ramanan Vaidyanathan, Ajay Modi, Azeem Suleman, Krishna Doddapaneni, Sarang Dharmapurikar, Ganlin Wu
  • Patent number: 9502111
    Abstract: In some implementations, network traffic can be routed along equal cost paths based on weights assigned to each path. For example, weighted equal cost multipath routing can be implemented by assigning weights to each equal cost path (e.g., uplink, next hop node) to a destination device. When the network device receives a packet, the network device can generate a key (e.g., a random value, a hash value based on packet data, a value between 0 and n, etc.). The key can be used to select an uplink or path upon which to forward the packet. A key can be generated for a packet flow or flowlet. Each flow can be associated with the same key so that each packet in a flow will be forwarded along the same path. Each flowlet can be forwarded along a different uplink.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: November 22, 2016
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Sarang Dharmapurikar, Mohammadreza Alizadeh Attar, Navindra Yadav, Ramanan Vaidyanathan, Kit Chiu Chu
  • Publication number: 20150124652
    Abstract: In some implementations, network traffic can be routed along equal cost paths based on weights assigned to each path. For example, weighted equal cost multipath routing can be implemented by assigning weights to each equal cost path (e.g., uplink, next hop node) to a destination device. When the network device receives a packet, the network device can generate a key (e.g., a random value, a hash value based on packet data, a value between 0 and n, etc.). The key can be used to select an uplink or path upon which to forward the packet. A key can be generated for a packet flow or flowlet. Each flow can be associated with the same key so that each packet in a flow will be forwarded along the same path. Each flowlet can be forwarded along a different uplink.
    Type: Application
    Filed: August 1, 2014
    Publication date: May 7, 2015
    Inventors: Sarang Dharmapurikar, Mohammadreza Alizadeh Attar, Navindra Yadav, Ramanan Vaidyanathan, Kit Chiu Chu