Patents by Inventor Vaduvur Bharghavan

Vaduvur Bharghavan 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: 10380570
    Abstract: Embodiments of the present invention provide a system and method for an access point providing client to point-of-sale communication over a network, comprising: receiving credentials from the point-of-sale; sending at least one beacon message; receiving a probe request from a client; sending a probe response to the client; authenticating a connection with the client; exchanging capabilities with the client; performing a security handshake with the client; assigning at least one dynamic IP address to the client; and establishing an https session between the client and the point-of-sale over the network.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: August 13, 2019
    Assignee: Ondot System, Inc.
    Inventors: Vaduvur Bharghavan, Jari Malinen, Rajinder Singh, Jason Fieldman, Rachna Ahlawat, Kannan Konath, Sandeep Gilotra
  • Patent number: 10341920
    Abstract: Data distribution between mobile stations and external data paths is assigned to a new set of devices, distribution points. Each distribution point is independently coupled to mobile stations, also assigned to access points. Control elements operate to control the distribution points separately from the access points. Each access point maintains a substantially stateless link with each distribution point for which the two share a mobile station. Access points might exchange data with any one or more distribution points concurrently. Access points thus obtain greater bandwidth connectivity to external data paths. Mobile stations transfer between access points and transfer between distribution points independently. This has the effect that bandwidth connectivity between distribution points and external data paths have no particular requirement for VLAN separation. Mobile stations may roam among multiple Internet protocol subnets.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: July 2, 2019
    Assignee: Fortinet, INc
    Inventors: Sung-Wook Han, Martin Ostrowski, Vaduvur Bharghavan
  • Patent number: 10327186
    Abstract: A technique for providing per station control of multiple stations in a wireless network across multiple access points. A look-up table that assigns a station connected to the access point and at least one communication parameter to each of a plurality of persistent, uniquely-assigned BSSIDs (Basic Service Set Identifiers) is stored. An access point responds to messages addressed one of the plurality of persistent, uniquely-assigned BSSIDs and ignores messages addressed to other BSSIDs. Persistence of the BSSID allows the controller to maintain individual control over each station after moving to a second access point of the plurality of access points. A frame comprising the plurality of BSSIDs corresponding to each connected station aggregated into the frame is generated. The frame is transmitted to the plurality of stations.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: June 18, 2019
    Assignee: Fortinet, Inc.
    Inventors: Anil Kaushik, Sirivatsan Sankaranarayanan, Vaduvur Bharghavan, Sung-Wook Han, Joseph Epstein, Berend Dunsbergen, Saravanan Balasubramaniyan
  • Publication number: 20190147450
    Abstract: Raw merchant data of real-time ISO transactions is enriched with normalized merchant data, including a normalized merchant name, a normalized merchant location, by transmitting the raw merchant data to an external resource and receiving the normalized raw merchant data from the external resource. An authorization request from a real-time ISO transaction concerning a specific mobile user can be initiated by a specific merchant device at a merchant location. A user location is obtained and utilized to identify enriched merchant data. It is the enriched merchant data that is used for deciding whether to approve or deny a transaction with more accuracy.
    Type: Application
    Filed: December 20, 2018
    Publication date: May 16, 2019
    Inventors: Vaduvur Bharghavan, Sung-Wook Han, Zhiqiang Zhang
  • Patent number: 10278105
    Abstract: AP's associated with a communication network and any wireless devices desiring contact, operated according to a protocol in which each wireless device selects AP's with which to communicate. A system coordinator causes the AP's to operate so as to guide each wireless device to an AP selected by the system coordinator. This has the effect that, notwithstanding that the protocol involves having the wireless device make the selection of AP, functionally, the AP's make the selection for it. In a 1st technique, multiple AP's share an identifier, with the system coordinator directing one particular AP to respond to the wireless device, thus appearing to wireless devices as a “personal cell”. In a 2nd technique, AP's each maintain identifiers substantially unique to each wireless device, with the system coordinator directing only one particular AP to maintain any particular wireless device's identifier, thus appearing to wireless devices as a “personal AP”.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: April 30, 2019
    Assignee: Fortinet, Inc.
    Inventors: Vaduvur Bharghavan, Sung-Wook Han, Joseph Epstein, Berend Dunsbergen, Saravanan Balasubramanian
  • Patent number: 10225764
    Abstract: Uplink medium access control on per-wireless device level for a specific user. An access point sends a beacon frame to a wireless device. The beacon frame includes a BSSID that is unique to the wireless device. The beacon frame also includes embedded uplink configurations specifying uplink medium access for the wireless device. In one embodiment, a controller recognizes a device or user associated with the device, and sends corresponding uplink configurations for embedding in a subsequent beacon frame.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: March 5, 2019
    Assignee: Fortinet, Inc.
    Inventors: Mohan Ram, Sung-Wook Han, Berend Dunsbergen, Vaduvur Bharghavan, Joseph Epstein
  • Patent number: 10210497
    Abstract: A method for a server performing a wireless payment transaction is disclosed. The method comprises providing a server web page or native application including options for a user selecting a role as payer or payee; requesting information from the payee including a transaction ID provided by the server; requesting information from the payer including the transaction ID; initiating an authorization of the transaction on a credit or debit account of the payer; initiating a transaction to credit the payee's account; and completing the transaction with the payer by initiating the offline clearing of the transaction.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: February 19, 2019
    Assignee: OnDot Systems, Inc.
    Inventors: Vaduvur Bharghavan, Jari Malinen, Rajinder Singh, Jason Fieldman, Rachna Ahlawat, Kannan Konath, Sandeep Gilotra
  • Patent number: 10163108
    Abstract: Embodiments of the present invention provide systems and methods for generating policy-based transaction alerts. In accordance with the systems and methods, an alert generation engine transparently detects ongoing transactions without participating in the transaction path, and generates policy-based alerts.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: December 25, 2018
    Assignee: Ondot Systems, Inc.
    Inventors: Vaduvur Bharghavan, Jari Malinen, Rahul Paul, Ramachandran Minakshi Sundaram
  • Patent number: 10043182
    Abstract: A method and system for processing a payment authorization request associated with a payment card is provided. The method comprises determining a cardholder's context based on transmissions received from a user device associated with a cardholder using the payment card; determining a transaction context based on analysis of the payment authorization request; determining at least one transaction authorization preference associated with the payment card; performing a transaction authorization process to generate a transaction authorization response based on the at least one transaction authorization preference wherein information in the transaction context is used as a hint to selectively guide application of the transaction authorization preference.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: August 7, 2018
    Assignee: Ondot System, Inc.
    Inventors: Vaduvur Bharghavan, Rajesh Gurumurthy, Rahul Paul, Govardan Prasad, Ramachandran Minakshi Sundaram, Rachna Ahlawat
  • Publication number: 20180176844
    Abstract: AP's associated with a communication network and any wireless devices desiring contact, operated according to a protocol in which each wireless device selects AP's with which to communicate. A system coordinator causes the AP's to operate so as to guide each wireless device to an AP selected by the system coordinator. This has the effect that, notwithstanding that the protocol involves having the wireless device make the selection of AP, functionally, the AP's make the selection for it. In a 1st technique, multiple AP's share an identifier, with the system coordinator directing one particular AP to respond to the wireless device, thus appearing to wireless devices as a “personal cell”. In a 2nd technique, AP's each maintain identifiers substantially unique to each wireless device, with the system coordinator directing only one particular AP to maintain any particular wireless device's identifier, thus appearing to wireless devices as a “personal AP”.
    Type: Application
    Filed: November 14, 2017
    Publication date: June 21, 2018
    Inventors: Vaduvur BHARGHAVAN, Sung-Wook HAN, Joseph EPSTEIN, Berend DUNSBERGEN, Saravanan BALASUBRAMANIAN
  • Publication number: 20180152864
    Abstract: Data distribution between mobile stations and external data paths is assigned to a new set of devices, distribution points. Each distribution point is independently coupled to mobile stations, also assigned to access points. Control elements operate to control the distribution points separately from the access points. Each access point maintains a substantially stateless link with each distribution point for which the two share a mobile station. Access points might exchange data with any one or more distribution points concurrently. Access points thus obtain greater bandwidth connectivity to external data paths. Mobile stations transfer between access points and transfer between distribution points independently. This has the effect that bandwidth connectivity between distribution points and external data paths have no particular requirement for VLAN separation. Mobile stations may roam among multiple Internet protocol subnets.
    Type: Application
    Filed: October 13, 2017
    Publication date: May 31, 2018
    Inventors: Sung-Wook Han, Martin Ostrowski, Vaduvur Bharghavan
  • Patent number: 9930595
    Abstract: A system and method for providing a seamless transition between access points for mobile devices. The method comprises associating a unique identifier for a plurality of mobile stations with a unique identifier for a first network in an acknowledgment table, then, upon receiving a frame from a mobile station, acknowledging the reception of the frame if the frame includes the unique identifier for the mobile station and the unique identifier for the network. The transfer of operation between access points is effectuated through the use of control circuitry which transfers portions of the contents of the acknowledgement table between various access points. This has the effect that the mobile stations does not sense a change in access points and thus the roaming from a first access point to a second access point is seamless.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: March 27, 2018
    Assignee: Fortinet, Inc.
    Inventors: Vaduvur Bharghavan, Berend Dunsbergen
  • Patent number: 9917752
    Abstract: A system and method for optimizing voice communications in a wireless network including an AP having a message waiting time that provides proper QoS while losing minimal communication bandwidth. The QoS may be responsive to the amount of user traffic in both the AP and neighboring APs. The method may include setting parameters for each level of QoS in response to a measure of the degree of contention for that level of QoS, and in response to a measure of the degree of contention for those levels of QoS with higher priority, and setting waiting time parameters in response to a stochastic model of contention at each level of QoS. Operational parameters might include contention window time, AIFS time, and back-off value(s), and might be modified in response to message QoS.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: March 13, 2018
    Assignee: Fortinet, LLC
    Inventors: Mohan Ram, Vaduvur Bharghavan
  • Patent number: 9906650
    Abstract: A system and method for optimizing voice communications in a wireless network including an AP having a message waiting time that provides proper QoS while losing minimal communication bandwidth. The QoS may be responsive to the amount of user traffic in both the AP and neighboring APs. The method may include setting parameters for each level of QoS in response to a measure of the degree of contention for that level of QoS, and in response to a measure of the degree of contention for those levels of QoS with higher priority, and setting waiting time parameters in response to a stochastic model of contention at each level of QoS. Operational parameters might include contention window time, AIFS time, and back-off value(s), and might be modified in response to message QoS.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: February 27, 2018
    Assignee: Fortinet, LLC
    Inventors: Mohan Ram, Vaduvur Bharghavan
  • Patent number: 9860813
    Abstract: AP's associated with a communication network and any wireless devices desiring contact, operated according to a protocol in which each wireless device selects AP's with which to communicate. A system coordinator causes the AP's to operate so as to guide each wireless device to an AP selected by the system coordinator. This has the effect that, notwithstanding that the protocol involves having the wireless device make the selection of AP, functionally, the AP's make the selection for it. In a 1st technique, multiple AP's share an identifier, with the system coordinator directing one particular AP to respond to the wireless device, thus appearing to wireless devices as a “personal cell”. In a 2nd technique, AP's each maintain identifiers substantially unique to each wireless device, with the system coordinator directing only one particular AP to maintain any particular wireless device's identifier, thus appearing to wireless devices as a “personal AP”.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: January 2, 2018
    Assignee: Fortinet, Inc.
    Inventors: Vaduvur Bharghavan, Sung-Wook Han, Joseph Epstein, Berend Dunsbergen, Saravanan Balasubramanian
  • Patent number: 9838911
    Abstract: Data distribution between mobile stations and external data paths is assigned to a new set of devices, distribution points. Each distribution point is independently coupled to mobile stations, also assigned to access points. Control elements operate to control the distribution points separately from the access points. Each access point maintains a substantially stateless link with each distribution point for which the two share a mobile station. Access points might exchange data with any one or more distribution points concurrently. Access points thus obtain greater bandwidth connectivity to external data paths. Mobile stations transfer between access points and transfer between distribution points independently. This has the effect that bandwidth connectivity between distribution points and external data paths have no particular requirement for VLAN separation. Mobile stations may roam among multiple Internet protocol subnets.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: December 5, 2017
    Assignee: Fortinet, Inc.
    Inventors: Sung-Wook Han, Martin Ostrowski, Vaduvur Bharghavan
  • Publication number: 20170303176
    Abstract: A technique for providing per station control of multiple stations in a wireless network across multiple access points. A look-up table that assigns a station connected to the access point and at least one communication parameter to each of a plurality of persistent, uniquely-assigned BSSIDs (Basic Service Set Identifiers) is stored. An access point responds to messages addressed one of the plurality of persistent, uniquely-assigned BSSIDs and ignores messages addressed to other BSSIDs. Persistence of the BSSID allows the controller to maintain individual control over each station after moving to a second access point of the plurality of access points. A frame comprising the plurality of BSSIDs corresponding to each connected station aggregated into the frame is generated. The frame is transmitted to the plurality of stations.
    Type: Application
    Filed: May 4, 2017
    Publication date: October 19, 2017
    Inventors: Anil KAUSHIK, Sirivatsan Sankaranarayanan, Vaduvur Bharghavan, Sung-Wook Han, Joseph Epstein, Berend Dunsbergen, Saravanan BALASUBRAMANIYAN
  • Patent number: 9794801
    Abstract: Reliable multicast delivery in wireless communication, even when a WS doesn't know its AP, is determined at the AP without the sending device. Multicast packets are received at each AP having destinations. Without altering those packets, the AP encapsulates them in an A-MSDU packet. Each A-MSDU packet is sent individually to each destination, and might encapsulate more than one multicast packet. Destinations might receive two streaming messages faster than if sent separately. AP's might choose a 1st multiple of multicast packets from a 1st source, a 2nd, different, multiple of multicast packets from a 2nd source, and a single multicast packet from a 3rd source. Individualized optimization of transmission parameters for each A-MSDU packet and each multicast packet therein. Individualized optimization of transmission parameters for the A-MSDU packet for each destination. The AP collectively optimizes delivery of distinct multicast packets to different destinations.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: October 17, 2017
    Assignee: Fortinet, Inc.
    Inventors: Mohan Ram, Vaduvur Bharghavan
  • Patent number: 9761958
    Abstract: One or more access points in a wireless communication system, wherein at least one of those access points includes a set of more than one antennae capable of concurrent communication, and at least one of those more than one antennae is isolated from a remainder of that set of antennae during concurrent communication. Isolation includes one or more of disposed a first antenna in a null region of a second antenna, disposing a first antenna to communicate polarized and substantially orthogonal to a second antenna, disposing a set of antennae to communicate at two or more carrier frequencies, wherein each first antenna adjacent to a second antenna operate at distinct such carrier frequencies, or disposing a set of antennae to communicate using two or more substantially distinct protocols, wherein substantially each first antenna adjacent to a second antenna operate at substantially distinct such protocols.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: September 12, 2017
    Assignee: Fortinet, Inc.
    Inventors: Vaduvur Bharghavan, Rajendran Venugopalachary, Srinivas Sivaprakasam
  • Patent number: 9730125
    Abstract: A technique for providing per station control of multiple stations in a wireless network across multiple access points. A look-up table that assigns a station connected to the access point and at least one communication parameter to each of a plurality of persistent, uniquely-assigned BSSIDs (Basic Service Set Identifiers) is stored. An access point responds to messages addressed one of the plurality of persistent, uniquely-assigned BSSIDs and ignores messages addressed to other BSSIDs. Persistence of the BSSID allows the controller to maintain individual control over each station after moving to a second access point of the plurality of access points. A frame comprising the plurality of BSSIDs corresponding to each connected station aggregated into the frame is generated. The frame is transmitted to the plurality of stations.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: August 8, 2017
    Assignee: Fortinet, Inc.
    Inventors: Anil Kaushik, Srivatsan Sankaranarayanan, Vaduvur Bharghavan, Sung-Wook Han, Joseph Epstein, Berend Dunsbergen, Saravanan Balasubramaniyan