Patents by Inventor Sandeep Khanna

Sandeep Khanna 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: 10693894
    Abstract: Upon receiving malware detection rules that are to be identified with respect to an input traffic stream, a sequence of state definitions are generated for each of the rules. The state definitions for each rule correspond to respective segments of the rule and specify conditions under which a state machine is to transition between search states corresponding to those segments, at least one of the segments corresponding to multiple characters within the input traffic stream. A state machine transitions between search states corresponding to one or more of the rules in accordance with contents of the input traffic stream and the conditions specified by the sequence of state definitions.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: June 23, 2020
    Assignee: Redberry Systems, Inc.
    Inventors: Sandeep Khanna, Varadarajan Srinivasan, Madhavan Bakthavatchalam
  • Patent number: 10677890
    Abstract: A radar apparatus for estimating position of a plurality of obstacles. The radar apparatus includes a receive antenna unit. The receive antenna unit includes a linear array of antennas and an additional antenna at a predefined offset from at least one antenna in the linear array of antennas. The radar apparatus also includes a signal processing unit. The signal processing unit estimates an azimuth frequency associated with each obstacle of the plurality of obstacles from a signal received from the plurality of obstacles at the linear array of antennas. In addition, the signal processing unit estimates an azimuth angle and an elevation angle associated with each obstacle from the estimated azimuth frequency associated with each obstacle.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: June 9, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sandeep Rao, Saurabh Khanna
  • Patent number: 10218721
    Abstract: Upon receiving malware detection rules that are to be identified with respect to an input traffic stream, a sequence of state definitions are generated for each of the rules. The state definitions for each rule correspond to respective segments of the rule and specify conditions under which a state machine is to transition between search states corresponding to those segments, at least one of the segments corresponding to multiple characters within the input traffic stream. A state machine transitions between search states corresponding to one or more of the rules in accordance with contents of the input traffic stream and the conditions specified by the sequence of state definitions.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: February 26, 2019
    Assignee: Redberry Systems, Inc.
    Inventors: Sandeep Khanna, Varadarajan Srinivasan, Madhavan Bakthavatchalam
  • Patent number: 10033750
    Abstract: In a malware detection device, first characters in a network traffic flow are compared with a plurality of entries within a ternary content addressable memory (TCAM), the plurality of entries including a first entry that constitutes a first segment of a malware signature. In response to an output from the first TCAM indicating that the first characters match the first entry, a variable-character expression engine determines whether second characters in the network traffic flow match a first variable-length regular expression, the variable-length regular expression corresponding to a second segment of the malware signature. A comparand value is generated that includes third characters in the network traffic flow and an expression-match value that indicates whether the second characters match the first variable-length regular expression. The TCAM compares the first comparand value with the plurality of entries therein as part of a determination whether the network traffic flow contains the malware signature.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: July 24, 2018
    Assignee: Redberry Systems, Inc.
    Inventors: Madhavan Bakthavatchalam, Varadarajan Srinivasan, Sandeep Khanna
  • Patent number: 9967272
    Abstract: Upon receiving malware detection rules that are to be identified with respect to an input traffic stream, a sequence of state definitions are generated for each of the rules. The state definitions for each rule correspond to respective segments of the rule and specify conditions under which a state machine is to transition between search states corresponding to those segments, at least one of the segments corresponding to multiple characters within the input traffic stream. A state machine transitions between search states corresponding to one or more of the rules in accordance with contents of the input traffic stream and the conditions specified by the sequence of state definitions.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: May 8, 2018
    Assignee: Redberry Systems, Inc.
    Inventors: Sandeep Khanna, Varadarajan Srinivasan, Madhavan Bakthavatchalam
  • Patent number: 9959525
    Abstract: A job searching and matching system and method is disclosed that gathers job seeker information in the form of job seeker parameters from one or more job seekers, gathers job information in the form of job parameters from prospective employers and/or recruiters, correlates the information with past job seeker behavior, parameters and behavior from other job seekers, and job parameters and, in response to a job seeker's query, provides matching job results based on common parameters between the job seeker and jobs along with suggested alternative jobs based on the co-relationships.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: May 1, 2018
    Assignee: Monster Worldwide, Inc.
    Inventors: Changsheng Chen, Adam Hyder, Sandeep Khanna
  • Publication number: 20180114023
    Abstract: Upon receiving malware detection rules that are to be identified with respect to an input traffic stream, a rule database that requires less storage capacity than the malware detection rules is generated by substituting tokens for selected symbol strings within the malware detection rules. A compressed traffic stream is generated by substituting the tokens for instances of the selected symbol strings within the input traffic stream, and then compared with the rule database to determine whether the input traffic stream contains one or more symbol sequences that correspond to any of the malware detection rules.
    Type: Application
    Filed: October 24, 2017
    Publication date: April 26, 2018
    Inventors: Madhavan Bakthavatchalam, Sandeep Khanna, Varadarajan Srinivasan
  • Publication number: 20150235181
    Abstract: A job searching and matching system and method is disclosed that gathers job seeker information in the form of job seeker parameters from one or more job seekers, gathers job information in the form of job parameters from prospective employers and/or recruiters, correlates the information with past job seeker behavior, parameters and behavior from other job seekers, and job parameters and, in response to a job seeker's query, provides matching job results based on common parameters between the job seeker and jobs along with suggested alternative jobs based on the co-relationships.
    Type: Application
    Filed: March 9, 2015
    Publication date: August 20, 2015
    Inventors: Changsheng Chen, Adam Hyder, Sandeep Khanna
  • Patent number: 9063840
    Abstract: A CAM device including a CAM array, multiple match resolution (MMR) circuitry, and a priority encoder allows the addresses of multiple matching locations resulting from a first search operation to be generated without losing the match results generated in second search operation initiated prior to detection of the multiple match condition for the first search operation. When the multiple match condition is detected, the MMR circuitry asserts a stall signal that stalls search operations in the CAM array. The asserted stall signal also causes the match results of the first and second search operations to be stored in separate memory elements so that the addresses of all matching locations for the first search operation can be generated without disturbing the match results of the second search operation.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: June 23, 2015
    Assignee: Broadcom Corporation
    Inventors: Chetan Deshpande, Sandeep Khanna, Varadarajan Srinivasan
  • Patent number: 8982596
    Abstract: A CAM device includes a CAM array that can implement column redundancy in which a defective column segment in a selected block can be functionally replaced by a selected column segment of the same block, and/or by a spare column segment of the same block.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: March 17, 2015
    Assignee: Netlogic Microsystems, Inc.
    Inventors: Varadarajan Srinivasan, Bindiganavale S. Nataraj, Sandeep Khanna
  • Patent number: 8977618
    Abstract: A job searching and matching system and method is disclosed that gathers job seeker information in the form of job seeker parameters from one or more job seekers, gathers job information in the form of job parameters from prospective employers and/or recruiters, correlates the information with past job seeker behavior, parameters and behavior from other job seekers, and job parameters and, in response to a job seeker's query, provides matching job results based on common parameters between the job seeker and jobs along with suggested alternative jobs based on the co-relationships.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: March 10, 2015
    Assignee: Monster Worldwide, Inc.
    Inventors: Changsheng Chen, Adam Hyder, Sandeep Khanna
  • Patent number: 8913412
    Abstract: A content addressable memory (CAM) device having any number of rows, each of the rows including a match line connected to a plurality of CAM cells, a match line detector circuit, and an incremental match line charge circuit. The detector circuit generates a feedback signal based on a detected match line voltage. The charge circuit partially pre-charges the match line to an intermediate voltage during a pre-charge phase of a compare operation, and then selectively charges the match line higher towards a supply voltage in response to the feedback signal.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: December 16, 2014
    Assignee: Netlogic Microsystems, Inc.
    Inventors: Sandeep Khanna, Bindiganavale S. Nataraj, Varadarajan Srinivasan
  • Patent number: 8901909
    Abstract: An integrated circuit device for delivering power to a load includes a controller circuit, a cascade circuit, and a power delivery circuit. The controller circuit generates a plurality of control signals. The cascade circuit receives the control signals from the controller circuit and sequentially outputs the control signals onto a cascade bus. The power delivery circuit receives the control signals from the controller circuit and delivers an amount of current to the load, in response to one of the control signals.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: December 2, 2014
    Assignee: NetLogic Microsystems, Inc.
    Inventors: Sandeep Khanna, Maheshwaran Srinivasan, De Cai Li, Chetan Deshpande
  • Patent number: 8836306
    Abstract: An integrated circuit device for delivering power to a load includes a controller circuit, a cascade circuit, and a power delivery circuit. The controller circuit generates a plurality of control signals. The cascade circuit receives the control signals from the controller circuit and sequentially outputs the control signals onto a cascade bus. The power delivery circuit receives the control signals from the controller circuit and delivers an amount of current to the load, in response to one of the control signals.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: September 16, 2014
    Assignee: NetLogic Microsystems, Inc.
    Inventors: Sandeep Khanna, Maheshwaran Srinivasan, De Cai Li, Chetan Deshpande
  • Patent number: 8774389
    Abstract: A method and system to optimally route telephone calls between shared service centers is presented. Using a combination of service tiers, Agent Directory, Instant Messaging (IM), and Voice over Internet Protocol (VoIP) provides optimal routing of incoming calls for assistance. The method utilizes different protocols during normal operations, transitional operations, and emergency operations, and addresses Shared Service Center (SSC) planning and management.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: July 8, 2014
    Assignee: International Business Machines Corporation
    Inventors: Steven M. Kagan, Sandeep Khanna, John Arthur Ricketts, William M. Thompson
  • Patent number: 8767488
    Abstract: A method and apparatus for performing half-column redundancy in a CAM device is disclosed, capable of replacing a defective half-column in the CAM array with only one half of another column. For example, present embodiments can provide twice the redundancy by replacing only one half of a defective CAM cell with one half of a spare cell or of a selected cell. The half-column redundancy disclosed herein provides finer granularity and higher effectiveness to the redundancy scheme as compared to conventional redundancy schemes employed on a CAM array. Thus, the CAM array can be designed and fabricated with a higher yield without having to accommodate for more spare columns than employed by conventional redundancy schemes, allowing for more efficient use of silicon area and a more robust CAM array design.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: July 1, 2014
    Assignee: NetLogic Microsystems, Inc.
    Inventors: Varadarajan Srinivasan, Sandeep Khanna, Bindiganavale S. Nataraj
  • Patent number: 8730704
    Abstract: A CAM device is disclosed that includes an array of CAM cells in which the compare circuits of groups of CAM cells are connected together using a conductive layer interposed between a polysilicon layer of the CAM device and the metal-1 layer of the CAM device. This allows the data lines (e.g., the bit lines and/or comparand lines) of the CAM array to be formed in the metal-1 layer of the CAM device, which in turn allows the match lines of the CAM array to be formed in the metal-2 layer of the CAM device. The conductive layer, which may be a silicide layer, is connected to the match line by a via extending from the conductive layer through the metal-1 layer to the metal-2 layer.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: May 20, 2014
    Assignee: NetLogic Microsystems, Inc.
    Inventors: Bindiganavale S. Nataraj, John Zimmer, Sandeep Khanna, Vinay Iyengar, Chetan Deshpande
  • Patent number: 8631195
    Abstract: A search system for detecting whether one or more overlapping sequences of input characters match a regular expression including a prefix string preceding an intermediate expression having a quantified number m of characters belonging to a specified character class is disclosed. The search system includes a CAM array for storing the regular expression, a shift register for counting sequences of input characters that match the character class, and a control circuit that enables the shift register in response to a prefix match and increments the shift register in response to character class matches.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: January 14, 2014
    Assignee: NetLogic Microsystems, Inc.
    Inventors: Sandeep Khanna, Maheshwaran Srinivasan, Mark Birman
  • Publication number: 20130317998
    Abstract: A job searching and matching system and method is disclosed that gathers job seeker information in the form of job seeker parameters from one or more job seekers, gathers job information in the form of job parameters from prospective employers and/or recruiters, correlates the information with past job seeker behavior, parameters and behavior from other job seekers, and job parameters and, in response to a job seeker's query, provides matching job results based on common parameters between the job seeker and jobs along with suggested alternative jobs based on the co-relationships.
    Type: Application
    Filed: July 31, 2013
    Publication date: November 28, 2013
    Applicant: Monster Worldwide, Inc.
    Inventors: Changsheng Chen, Adam Hyder, Sandeep Khanna
  • Patent number: 8527510
    Abstract: A job searching and matching system and method is disclosed that gathers job seeker information in the form of job seeker parameters from one or more job seekers, gathers job information in the form of job parameters from prospective employers and/or recruiters, correlates the information with past job seeker behavior, parameters and behavior from other job seekers, and job parameters and, in response to a job seeker's query, provides matching job results based on common parameters between the job seeker and jobs along with suggested alternative jobs based on the co-relationships.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: September 3, 2013
    Assignee: Monster Worldwide, Inc.
    Inventors: Changsheng Chen, Adam Hyder, Sandeep Khanna