Patents by Inventor Lakshman S. Tamil

Lakshman S. Tamil 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: 10213152
    Abstract: An embodiment of the invention is directed to a method for the real time monitoring and measurement of sleep quality of a subject comprising the steps of; obtaining information from the subject using sensory signals; analyzing the information contained within the signals using signal processing and artificial intelligence; and using the analyzed information to create a protocol to improve the sleep quality of the subject. Another embodiment of the invention is directed to a system for real time monitoring and measurement of sleep quality of a subject comprising: a means for obtaining sensory information from the subject; a means for transmitting the sensory information; a means for analyzing the sensory information; and a means for creating a protocol to improve the sleep quality of the subject.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: February 26, 2019
    Assignee: THE BOARD OF REGENTS OF THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Majdi Bsoul, Lakshman S. Tamil
  • Patent number: 9161705
    Abstract: A device and method for heart performance characterization and abnormality detection is disclosed herein. The device and method analyze and characterize cardiac electrophysiological signals which help in the diagnosis of myocardial ischemia in advance of a heart attack.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: October 20, 2015
    Assignee: The Board of Regents of the University of Texas System
    Inventors: Lakshman S. Tamil, Mehrdad Nourani, Gopal Gupta, Subhash Banerjee
  • Publication number: 20130090571
    Abstract: The present invention relates generally to the prevention and treatment of pressure ulcers and a platform for monitoring, prevention and management of pressure ulcer using a pressure mapping system that records a patient's bed posture, tracks different limbs along with associated statistical pressure image data and produces a summary report for care givers after data analysis and risk assessment. The methodology allows care givers to utilize the stress data and schedule the repositioning of the patient more effectively. The invention relates to creation and using algorithms and analytics for monitoring, prevention and management of pressure ulcers which include time-stamped whole-body pressure distribution data collection and profiling; posture classification, limb detection and tracking; quality of turn and risk assessment; turning schedule and nursing staff utilization for pressure ulcer management; and patient status reporting system customized for caregivers.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 11, 2013
    Applicant: The Board of Regents of the University of Texas System
    Inventors: Mehrdad Nourani, Matthew Q. Pompeo, Lakshman S. Tamil, Sarah Ostadabbas, Rasoul Yousefi
  • Publication number: 20130046151
    Abstract: An embodiment of the invention is directed to a method for the real time monitoring and measurement of sleep quality of a subject comprising the steps of; obtaining information from the subject using sensory signals; analyzing the information contained within the signals using signal processing and artificial intelligence; and using the analyzed information to create a protocol to improve the sleep quality of the subject. Another embodiment of the invention is directed to a system for real time monitoring and measurement of sleep quality of a subject comprising: a means for obtaining sensory information from the subject; a means for transmitting the sensory information; a means for analyzing the sensory information; and a means for creating a protocol to improve the sleep quality of the subject.
    Type: Application
    Filed: February 14, 2012
    Publication date: February 21, 2013
    Applicant: The Board of Regents of the University of Texas System
    Inventors: Majdi Bsoul, Lakshman S. Tamil
  • Publication number: 20120179055
    Abstract: A device and method for heart performance characterization and abnormality detection is disclosed herein. The device and method analyze and characterize cardiac electrophysiological signals which help in the diagnosis of myocardial ischemia in advance of a heart attack.
    Type: Application
    Filed: December 7, 2011
    Publication date: July 12, 2012
    Applicant: The Board of Regents of the University of Texas System
    Inventors: Lakshman S. Tamil, Mehrdad Nourani, Gopal Gupta, Subhash Banerjee
  • Patent number: 7869427
    Abstract: The invention includes systems and methods for improving the performance of non-blocking data switching systems. One embodiment of the invention includes a method comprising routing data from a plurality of inputs to a plurality of outputs through a switching core according to a first switching schedule, receiving a first set of reports comprising reports from data sources associated with the plurality of inputs, evaluating one or more reports of the first set of reports, determining a sufficiency of the first switching schedule based on the one or more reports, adapting a second switching schedule, wherein the second switching schedule differs from the first switching schedule, sending the second switching schedule to the data sources, issuing one or more synchronization signals associated with a transition to the second switching schedule to the data sources and routing data from the plurality of inputs to the plurality of outputs through the switching core according to the second switching schedule.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: January 11, 2011
    Assignee: YT Networks Capital, LLC
    Inventors: Robert E. Best, Ramaswamy Chandrasekaran, John R. Rudin, III, Rose Q. Hu, Jeff L. Watson, Lakshman S. Tamil, Alessandro Fabbri
  • Patent number: 7773608
    Abstract: A router, comprising: a core controller; a plurality of egress edge units coupled to said core controller, said plurality of egress edge units including at least one egress port; and a plurality of ingress edge units coupled to said core controller and in communication with said plurality of egress edge units, wherein each ingress edge unit comprises: a plurality of ingress ports; an ingress interface associated with each ingress port, each ingress interface operable to segregate incoming optical data into a plurality of subflows, wherein each subflow contains data intended for a particular destination port; and a TWDM multiplexer operable to: receive subflows; generate a micro lambda from each subflow; time multiplex each micro lambda according to a schedule pattern; wavelength multiplex each micro lambda; and transmit each micro lambda to a switch fabric according to the schedule pattern.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: August 10, 2010
    Inventors: Larry L. Miles, Lakshman S. Tamil, Scott A. Rothrock, Noland J. Posey, Jr., Gregory H. Aicklen
  • Patent number: 7729453
    Abstract: Systems and methods for determining a slicing level which is used as a threshold to determine whether timeslots of an incoming data signal contain ones or zeros. The method of one embodiment comprises receiving a data signal, identifying a maximum level of the data signal, identifying a minimum level of the data signal, determining an average of the minimum and maximum levels, and then using the average of the minimum and maximum levels as a slicing level to identify bits of a data packet embodied in the data signal.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: June 1, 2010
    Inventors: Bing Li, David Wolf, James Plesa, Lakshman S. Tamil
  • Patent number: 7715712
    Abstract: A non-blocking optical matrix core switching method that includes maintaining a schedule for routing data through an optical matrix core and receiving and analyzing reports from peripheral devices. The method determines whether the schedule is adequate for the current data traffic patterns and if the schedule is not adequate a new schedule is implemented. The new schedule is then transferred to the peripheral devices for implementation and the new schedule is transferred to the optical matrix core scheduler. Implementation of the new schedule as the schedule on the peripheral devices and the optical matrix core scheduler is then performed.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: May 11, 2010
    Inventors: Robert E. Best, Ramaswamy Chandrasekaran, John R. Rudin, III, Rose Q. Hu, Jeff L. Watson, Lakshman S. Tamil, Alessandro Fabbri
  • Patent number: 7526203
    Abstract: Embodiments of the present invention provide a system and method for providing non-blocking routing of optical data through an optical switch fabric. The optical switch fabric can include an optical switching matrix with a plurality of inputs intersecting with a plurality of outputs. A path switch can be located at each intersection that is operable to switch data arriving on an input to a particular output. The path switches can be configurable to create a plurality of unique paths through the optical switching matrix to allow routing in a non-blocking manner. Another aspect of the present invention can provide a system and method for providing non-blocking routing through an optical cross-bar switch. The optical cross-bar switch includes a plurality of input links, a plurality of output links and a plurality of switching elements.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: April 28, 2009
    Assignee: YT Networks Capital, LLC
    Inventor: Lakshman S. Tamil
  • Publication number: 20090074414
    Abstract: Embodiments of the present invention provide an optical network and switch architecture that provides non-blocking routing from an ingress router to an egress router in the network on a port-to-port basis. The present invention provides routing for fixed and variable length optical data packets of varying types (including Internet Protocol (IP), data, voice, TDM, ATM, voice over data, etc.) at speeds from sub-Terabit per second (Tbps), to significantly in excess of Petabit per second (Pbps). The present invention includes the functionality of both large IP routers and optical cross-connects combined with a unique, non-blocking optical switching and routing techniques to obtain benefits in speed and interconnected capacity in a data transport network. The present invention can utilize a TWDM wave slot transport scheme in conjunction with a just-in-time scheduling pattern and a unique optical switch configuration that provides for non-blocking transport of data from ingress to egress.
    Type: Application
    Filed: September 15, 2008
    Publication date: March 19, 2009
    Applicant: Yotta Networks, Inc.
    Inventors: Larry L. Miles, Lakshman S. Tamil, Scott A. Rothrock, Noland J. Posey, JR., Gregory H. Aicklen
  • Patent number: 7496033
    Abstract: Methods and systems for dynamically computing a schedule defining interconnections between ports in a switching system. In one embodiment, a switching core requests demand reports from the ingress ports. In response to this request, the ingress ports generate a series of suggested port schedules, beginning with a first choice, then a second choice, and so on. The schedules are transmitted to the switching core, beginning with the first choice. The switching core receives the first choice for each of the ports and determines whether the aggregate schedule defined by the first choices is valid. If the aggregate schedule is valid, then this schedule is implemented. If the aggregate schedule is not valid, portions of it are discarded and the next choice from each of the ports is examined to identify connections to replace the discarded portions. This process is repeated until a valid schedule is obtained.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: February 24, 2009
    Assignee: YT Networks Capital, LLC
    Inventors: Robert E. Best, Ramaswamy Chandrasekaran, John R. Rudin, III, Rose Q. Hu, Jeff L. Watson, Lakshman S. Tamil, Alessandro Fabbri
  • Publication number: 20090028560
    Abstract: A non-blocking optical matrix core switching method that includes maintaining a schedule for routing data through an optical matrix core and receiving and analyzing reports from peripheral devices. The method determines whether the schedule is adequate for the current data traffic patterns and if the schedule is not adequate a new schedule is implemented. The new schedule is then transferred to the peripheral devices for implementation and the new schedule is transferred to the optical matrix core scheduler. Implementation of the new schedule as the schedule on the peripheral devices and the optical matrix core scheduler is then performed.
    Type: Application
    Filed: August 4, 2008
    Publication date: January 29, 2009
    Applicant: YT NETWORKS CAPITAL, LLC
    Inventors: Robert E. Best, Ramaswamy Chandrasekaran, John R. Rudin, III, Rose Q. Hu, Jeff L. Watson, Lakshman S. Tamil, Alessandro Fabbri
  • Patent number: 7474853
    Abstract: A non-blocking optical matrix core switching method that includes maintaining a schedule for routing data through an optical matrix core and receiving and analyzing reports from peripheral devices. The method determines whether the schedule is adequate for the current data traffic patterns and if the schedule is not adequate a new schedule is implemented. The new schedule is then transferred to the peripheral devices for implementation and the new schedule is transferred to the optical matrix core scheduler. Implementation of the new schedule as the schedule on the peripheral devices and the optical matrix core scheduler is then performed.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: January 6, 2009
    Assignee: YT Networks Capital, LLC
    Inventors: Robert E. Best, Ramaswamy Chandrasekaran, John R. Rudin, III, Rose Q. Hu, Jeff L. Watson, Lakshman S. Tamil, Alessandro Fabbri
  • Patent number: 7443790
    Abstract: The present invention provides a system and method for slot deflection routing of optical data packets. The method of the present invention includes the steps of establishing a schedule pattern that includes a plurality of time slots. The schedule pattern includes at least one time slot in which an ingress edge unit can communicate with a destination egress edge unit, at least one time slot in which the ingress edge unit can communicate with a intermediate edge unit, and at least one time slot in which the intermediate edge unit can communicate with the destination egress edge unit. The present invention also includes receiving a data packet at the ingress edge unit and determining if the schedule pattern allocates sufficient bandwidth to send the data packet from the ingress edge unit to the destination egress edge unit without deflecting the data packet through an intermediate edge unit.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: October 28, 2008
    Assignee: YT Networks Capital, LLC
    Inventors: Gregory H. Aicklen, Lakshman S. Tamil
  • Patent number: 7426210
    Abstract: One embodiment of the present invention includes a router comprising an ingress edge unit with one or more ports and an egress edge unit with one or more ports connected by a switch fabric. The ingress edge unit can receive optical data and convert the optical data into a plurality of micro lambdas. The ingress edge unit can convert the incoming data to micro lambdas by generating a series of short-term parallel data bursts across multiple wavelengths. The ingress edge unit can also wavelength division multiplex and time domain multiplex each micro lambda for transmission to the switch fabric in a particular order. The switch fabric can receive the plurality of micro lambdas and route the plurality of micro lambdas to the plurality of egress edge units in a non-blocking manner.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: September 16, 2008
    Assignee: YT Networks Capital, LLC
    Inventors: Larry L. Miles, Lakshman S. Tamil, Scott A. Rothrock, Nolan J. Posey, Jr., Gregory H. Aicklen
  • Patent number: 7421053
    Abstract: Systems and methods for aligning the phase of a PLL with an incoming data signal. In one embodiment, when a data signal is received in a PLL, a phase perturbation signal is generated and injected into the PLL. The PLL then performs a phase alignment procedure to lock on to the received data signal. The phase perturbation signal is a damped sinusoidal oscillation that is injected into the PLL when each of a plurality of data packets is received. The perturbation signal has an amplitude sufficient to bump the PLL out of a quasi-stable state around 180 degrees out of phase with the incoming data signal, but is damped to less than a degree of phase shift within 30 ns of being injected.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: September 2, 2008
    Assignee: YT Networks Capital, LLC
    Inventors: Bing Li, David Wolf, James Plesa, Lakshman S. Tamil
  • Patent number: 7272309
    Abstract: Embodiments of the present invention provide a system and method for routing optical data. In one embodiment of the present invention, data can routed in a non-blocking fashion from a plurality of the ingress edge units to a plurality of egress edge units by selectively connecting the ingress edge units to the egress edge units at a photonic core. Switching at the photonic core can be driven by a clock signal and does not require an electrical to optical conversion to occur at the core. This can allow switching on the nanosecond level, substantially faster than many prior art systems.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: September 18, 2007
    Assignee: Yotta Networks, LLC
    Inventors: Lakshman S. Tamil, Bing Li, David Wolf, Scott Rothrock, Mitch Entezari
  • Patent number: 7251416
    Abstract: Systems and methods for optical cross connects which switch data at a container (packet) level. In one embodiment, a plurality of optical switch edges are coupled to an optical switch core via a minimal number of optical fibers. The switch core is configured to optically switch data from an ingress edge to one of a plurality of egress edges in a nonblocking fashion. The ingress edge receives data streams and distributes the data among a plurality of container processors. Each of these container processors produces an optical signal of a different wavelength, which can then be multiplexed with others to form a multiple-wavelength optical signal that is transmitted to the switch core. The switch core then switches successive portions (containers) of the multiple-wavelength signal to the egress edges to which they are respectively destined. The respective egress edges perform the reverse of this process to form output data signals.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: July 31, 2007
    Assignee: Yotta networks, LLC
    Inventors: Lakshman S. Tamil, Glen Collier, Mitch Entezari, Allesandro Fabbri, Gopalakrishnan Hari, Justin Hunt, Quan Jiang, Bing Li, Lee McFearin, Joseph M. McQuade, Earl Ponceti, Scott A. Rothrock, Frederick A. Rush, Alexander A. Smith, David Wolf
  • Patent number: 7218637
    Abstract: An architecture and related systems for improving the performance of non-blocking data switching systems. In one embodiment, a switching system includes an optical switching core coupled to a plurality of edge units, each of which has a set of ingress ports and a set of egress ports. The switching system also contains a scheduler that maintains two non-blocking data transfer schedules, only one of which is active at a time. Data is transferred through the switching system according to the active schedule. The scheduler monitors the sufficiency of data transferred according to the active schedule and, if the currently active schedule is insufficient, the scheduler recomputes the alternate schedule based on demand data received from the edges/ports and activates the alternate schedule. A timing mechanism is employed to ensure that the changeover to the alternate schedule is essentially simultaneous among the components of the system.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: May 15, 2007
    Assignee: Yotta Networks, LLC
    Inventors: Robert E. Best, Ramaswamy Chandrasekaran, John R. Rudin, III, Rose Q. Hu, Jeff L. Watson, Lakshman S. Tamil, Alessandro Fabbri