Patents by Inventor Krishna Kumar Bakthavathsalu

Krishna Kumar Bakthavathsalu 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: 10205705
    Abstract: A method and computing device configured to send and receive traffic over a virtual private network (VPN) connection, the computing device having a processor; and a communications subsystem, where the method determines that a first trigger had been met, wherein the first trigger is dynamically configured based on at least one factor at the computing device; monitors whether data traffic exists over the VPN connection for a first time period; and if no data traffic exists over the VPN connection for the first time period, disconnects the VPN connection.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: February 12, 2019
    Assignee: BlackBerry Limited
    Inventors: Krishna Kumar Bakthavathsalu, Ania Halliop, Jason Songbo Xu, Daryl Ming Ken Mau
  • Publication number: 20160135205
    Abstract: A method for accessing a Wi-Fi network from user equipment (UE) using a preferred access point (AP) when more than one AP is available is provided. RSSI included in received responses to scanning from the US and past connectivity data associated with the APs are used to generate a preferred list of APs from which an AP for connecting or switching to is selected.
    Type: Application
    Filed: January 18, 2016
    Publication date: May 12, 2016
    Inventors: Ion BARBU, Krishna Kumar BAKTHAVATHSALU, Ahmad Mohammad Mohammad KHOLAIF, Nayef Fawaz MENDAHAWI
  • Patent number: 9030985
    Abstract: A wireless communications device stores a first cryptographic key in connection with a profile, the profile indicating a security type requiring no credentials and a network name. An access point (AP) supports a wireless local area network (WLAN), the WLAN having the network name, the WLAN supporting the security type and the WLAN requiring a second cryptographic key for encryption. The wireless communications device successfully authenticates and associates with the AP, thus joining the WLAN. Subsequent to joining the WLAN, the wireless communications device conducts encrypted communications with the AP and detects from the encrypted communications that there is a mismatch between the first cryptographic key and the second cryptographic key. Responsive to detecting the mismatch, the wireless communications device bans the profile or the AP or both.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: May 12, 2015
    Assignee: BlackBerry Limited
    Inventors: Ahmad Mohammad Mohammad Kholaif, Ion Barbu, Nayef Fawaz Mendahawi, Krishna Kumar Bakthavathsalu
  • Patent number: 8881238
    Abstract: In the event of an authentication process failure, a mobile station bans a connection profile storing the credentials provided by the mobile station when initiating the failed authentication process, thus affecting how subsequent scans—other than discovery scans—and connection attempts are handled. In the event of an authentication process failure, a mobile station bans or suppresses an access point with which the mobile station initiated the failed authentication process. The mobile station refrains from transmitting any communications addressed to the unique identifier of any banned access point. The mobile station may ignore any communications received from a banned access point. Suppressed access points are occasionally not made available to the mobile station for selection as a target for a connection attempt.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: November 4, 2014
    Assignee: BlackBerry Limited
    Inventors: Ahmad Mohammad Mohammad Kholaif, Ion Barbu, Krishna Kumar Bakthavathsalu, Nayef Fawaz Mendahawi, Denis Fedotenko
  • Patent number: 8874177
    Abstract: A system and method of reducing the WLAN power consumption and limiting battery drain of a mobile communications device is provided. The mechanism continuously monitors for changes in the WLAN and cellular signal strength and modifies the WLAN profile scanning activity accordingly. By monitoring for changes, transitions can be detected which indicate the location of the mobile device (i.e., indoor or outdoor). An increase in cellular signal strength and a decrease in WLAN signal strength indicates the user is transitioning outdoors where WLAN coverage may be limited. To reduce battery power consumption, background scanning is suspended or its frequency significantly lowered. Moving indoors is indicated by a decrease in cellular signal strength and an increase in WLAN signal strength. Background/Connectivity scanning frequency is increased to provide shorter time-to-connect to WLAN Networks for the user within the WLAN coverage area.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: October 28, 2014
    Assignee: BlackBerry Limited
    Inventors: Krishna Kumar Bakthavathsalu, Ion Barbu, Nayef Fawaz Mendahawi, Ahmad Mohammad Mohammad Kholaif
  • Publication number: 20140207946
    Abstract: A method and computing device configured to send and receive traffic over a virtual private network (VPN) connection, the computing device having a processor; and a communications subsystem, where the method determines that a first trigger had been met, wherein the first trigger is dynamically configured based on at least one factor at the computing device; monitors whether data traffic exists over the VPN connection for a first time period; and if no data traffic exists over the VPN connection for the first time period, disconnects the VPN connection.
    Type: Application
    Filed: July 22, 2013
    Publication date: July 24, 2014
    Applicant: BlackBerry Limited
    Inventors: Krishna Kumar BAKTHAVATHSALU, Ania HALLIOP, Jason Songbo XU, Daryl Ming Ken MAU
  • Patent number: 8750245
    Abstract: Techniques in a mobile device for use in initiating vertical handover of a voice or a data call between a wireless local area network (WLAN) and a wide area wireless network (WWAN) are described. The mobile device performs communication operations for maintaining the voice or the data call via the WLAN or the WWAN. During the voice or the data call, the mobile device identifies a WLAN signal quality value of signals with the WLAN, as well as a WWAN signal quality value of signals with the WWAN. The mobile device then performs a comparative evaluation of the WLAN and the WWAN signal quality values, and initiates a vertical handover of the voice or the data call between the WLAN and the WWAN based on the comparative evaluation of the WLAN and WWAN signal quality values. The comparative evaluation may involve calculating a signal indicator value which is based on a ratio of the WLAN and the WWAN signal quality values.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: June 10, 2014
    Assignee: BlackBerry Limited
    Inventors: Krishna Kumar Bakthavathsalu, Ion Barbu, Nayef Fawaz Mendahawi, Ahmad Mohammad Kholaif
  • Publication number: 20140148131
    Abstract: In the event of an authentication process failure, a mobile station bans a connection profile storing the credentials provided by the mobile station when initiating the failed authentication process, thus affecting how subsequent scans—other than discovery scans—and connection attempts are handled. In the event of an authentication process failure, a mobile station bans or suppresses an access point with which the mobile station initiated the failed authentication process. The mobile station refrains from transmitting any communications addressed to the unique identifier of any banned access point. The mobile station may ignore any communications received from a banned access point. Suppressed access points are occasionally not made available to the mobile station for selection as a target for a connection attempt.
    Type: Application
    Filed: January 30, 2014
    Publication date: May 29, 2014
    Applicant: BLACKBERRY LIMITED
    Inventors: Ahmad Mohammad Mohammad Kholaif, Ion Barbu, Krishna Kumar Bakthavathsalu, Nayef Fawaz Mendahawi, Denis Fedotenko
  • Patent number: 8724603
    Abstract: A method for network access and a mobile station configured for the same is described. In one embodiment, there is provided a method for network access on a mobile station comprising: scanning for Wi-Fi networks; receiving responses from available wireless access points (APs) of the Wi-Fi networks; selecting a Wi-Fi network in accordance with past connectivity data associated with the Wi-Fi networks of the available APs; and attempting to connect to the selected Wi-Fi network.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: May 13, 2014
    Assignee: BlackBerry Limited
    Inventors: Ion Barbu, Krishna Kumar Bakthavathsalu, Ahmad Mohammad Mohammad Kholaif, Nayef Fawaz Mendahawi
  • Patent number: 8699379
    Abstract: A target access point is selected from the results of a discovery scan so that a mobile station can attempt a connection with the target access point. The mobile station determines whether the target access point belongs to a small office/home office (SOHO)-type wireless local area network (WLAN) deployment or to a corporate/enterprise-type WLAN deployment. The mobile station then configures itself according to the determination of the type of WLAN deployment to which the target access point belongs.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: April 15, 2014
    Assignee: BlackBerry Limited
    Inventors: Ahmad Mohammad Mohammad Kholaif, Nayef Fawaz Mendahawi, Ion Barbu, Krishna Kumar Bakthavathsalu
  • Patent number: 8695063
    Abstract: In the event of an authentication process failure, a mobile station bans a connection profile storing the credentials provided by the mobile station when initiating the failed authentication process, thus affecting how subsequent scans—other than discovery scans—and connection attempts are handled. In the event of an authentication process failure, a mobile station bans or suppresses an access point with which the mobile station initiated the failed authentication process. The mobile station refrains from transmitting any communications addressed to the unique identifier of any banned access point. The mobile station may ignore any communications received from a banned access point. Suppressed access points are occasionally not made available to the mobile station for selection as a target for a connection attempt.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: April 8, 2014
    Assignee: BlackBerry Limited
    Inventors: Ahmad Mohammad Kholaif, Ion Barbu, Krishna Kumar Bakthavathsalu, Nayef Fawaz Mendahawi, Denis Fedotenko
  • Patent number: 8427991
    Abstract: A power reduction mechanism in a mobile communications device detects the use of a wrong WEP encryption key in the establishment of a WLAN connection between the mobile device and an access point for both static and dynamic IP WLAN profiles. The power reduction mechanism detects an incorrect WEP key; authentication failure; failure to acquire an IP address for dynamic IP WLAN profiles; decryption errors; and broadcast/multicast frames from the handset not being redirected back to the BSS by the AP. Upon such detection, the mobile device takes one or more power conserving actions, e.g., adding the AP/profile to a ban list; attempting WLAN association for a banned AP/profile at longer intervals than for a non-banned AP/profile; skipping an AP/profile on the ban list for a time duration defined by a timer to conserve power; and flagging the banned AP/profile with a special mark to indicate it is banned.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: April 23, 2013
    Assignee: Research In Motion Limited
    Inventors: Ahmad Mohammad Kholaif, Ion Barbu, Nayef Fawaz Mendahawi, Krishna Kumar Bakthavathsalu
  • Patent number: 8385988
    Abstract: A system and method of reducing the WLAN power consumption and limiting battery drain of a mobile communications device is provided. The mechanism continuously monitors for changes in the WLAN and cellular signal strength and modifies the WLAN profile scanning activity accordingly. By monitoring for changes, transitions can be detected which indicate the location of the mobile device (i.e., indoor or outdoor). An increase in cellular signal strength and a decrease in WLAN signal strength indicates the user is transitioning outdoors where WLAN coverage may be limited. To reduce battery power consumption, background scanning is suspended or its frequency significantly lowered. Moving indoors is indicated by a decrease in cellular signal strength and an increase in WLAN signal strength. Background/Connectivity scanning frequency is increased to provide shorter time-to-connect to WLAN Networks for the user within the WLAN coverage area.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: February 26, 2013
    Assignee: Research In Motion Limited
    Inventors: Krishna Kumar Bakthavathsalu, Ion Barbu, Nayef Fawaz Mendahawi, Ahmad Mohammad Mohammad Kholaif
  • Publication number: 20120257536
    Abstract: A target access point is selected from the results of a discovery scan so that a mobile station can attempt a connection with the target access point. The mobile station determines whether the target access point belongs to a small office/home office (SOHO)-type wireless local area network (WLAN) deployment or to a corporate/enterprise-type WLAN deployment. The mobile station then configures itself according to the determination of the type of WLAN deployment to which the target access point belongs.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 11, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Ahmad Mohammad Mohammad Kholaif, Nayef Fawaz Mendahawi, Ion Barbu, Krishna Kumar Bakthavathsalu
  • Publication number: 20120230305
    Abstract: A method for network access and a mobile station configured for the same is described. In one embodiment, there is provided a method for Wi-Fi network access on a mobile station comprising: scanning for wireless access points (APs) of a Wi-Fi network; receiving responses from available APs of the Wi-Fi network; selecting an AP in accordance with past connectivity data associated with the available APs; and attempting to connect or switch to the Wi-Fi network using the selected AP.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 13, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Ion Barbu, Krishna Kumar Bakthavathsalu, Ahmad Mohammad Mohammad Kholaif, Nayef Fawaz Mendahawi
  • Publication number: 20120230304
    Abstract: A method for network access and a mobile station configured for the same is described. In one embodiment, there is provided a method for network access on a mobile station comprising: scanning for Wi-Fi networks; receiving responses from available wireless access points (APs) of the Wi-Fi networks; selecting a Wi-Fi network in accordance with past connectivity data associated with the Wi-Fi networks of the available APs; and attempting to connect to the selected Wi-Fi network.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 13, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Ion Barbu, Krishna Kumar Bakthavathsalu, Ahmad Mohammad Mohammad Kholaif, Nayef Fawaz Mendahawi
  • Publication number: 20120214533
    Abstract: A system and method of reducing the WLAN power consumption and limiting battery drain of a mobile communications device is provided. The mechanism continuously monitors for changes in the WLAN and cellular signal strength and modifies the WLAN profile scanning activity accordingly. By monitoring for changes, transitions can be detected which indicate the location of the mobile device (i.e., indoor or outdoor). An increase in cellular signal strength and a decrease in WLAN signal strength indicates the user is transitioning outdoors where WLAN coverage may be limited. To reduce battery power consumption, background scanning is suspended or its frequency significantly lowered. Moving indoors is indicated by a decrease in cellular signal strength and an increase in WLAN signal strength. Background/Connectivity scanning frequency is increased to provide shorter time-to-connect to WLAN Networks for the user within the WLAN coverage area.
    Type: Application
    Filed: May 2, 2012
    Publication date: August 23, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Krishna Kumar Bakthavathsalu, Ion Barbu, Nayef Mendahawi, Ahmad Kholaif
  • Publication number: 20120163344
    Abstract: Techniques in a mobile device for use in initiating vertical handover of a voice or a data call between a wireless local area network (WLAN) and a wide area wireless network (WWAN) are described. The mobile device performs communication operations for maintaining the voice or the data call via the WLAN or the WWAN. During the voice or the data call, the mobile device identifies a WLAN signal quality value of signals with the WLAN, as well as a WWAN signal quality value of signals with the WWAN. The mobile device then performs a comparative evaluation of the WLAN and the WWAN signal quality values, and initiates a vertical handover of the voice or the data call between the WLAN and the WWAN based on the comparative evaluation of the WLAN and WWAN signal quality values. The comparative evaluation may involve calculating a signal indicator value which is based on a ratio of the WLAN and the WWAN signal quality values.
    Type: Application
    Filed: February 28, 2011
    Publication date: June 28, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Krishna Kumar Bakthavathsalu, Ion Barbu, Nayef Fawaz Mendahawi, Ahmad Mohammad Kholaif
  • Patent number: 8195251
    Abstract: A system and method of reducing the WLAN power consumption and limiting battery drain of a mobile communications device is provided. The mechanism continuously monitors for changes in the WLAN and cellular signal strength and modifies the WLAN profile scanning activity accordingly. By monitoring for changes, transitions can be detected which indicate the location of the mobile device (i.e., indoor or outdoor). An increase in cellular signal strength and a decrease in WLAN signal strength indicates the user is transitioning outdoors where WLAN coverage may be limited. To reduce battery power consumption, background scanning is suspended or its frequency significantly lowered. Moving indoors is indicated by a decrease in cellular signal strength and an increase in WLAN signal strength. Background/Connectivity scanning frequency is increased to provide shorter time-to-connect to WLAN Networks for the user within the WLAN coverage area.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: June 5, 2012
    Assignee: Research In Motion Limited
    Inventors: Krishna Kumar Bakthavathsalu, Ion Barbu, Nayef Mendahawi, Ahmad Kholaif
  • Publication number: 20110211511
    Abstract: A system and method of reducing the WLAN power consumption and limiting battery drain of a mobile communications device is provided. The mechanism continuously monitors for changes in the WLAN and cellular signal strength and modifies the WLAN profile scanning activity accordingly. By monitoring for changes, transitions can be detected which indicate the location of the mobile device (i.e., indoor or outdoor). An increase in cellular signal strength and a decrease in WLAN signal strength indicates the user is transitioning outdoors where WLAN coverage may be limited. To reduce battery power consumption, background scanning is suspended or its frequency significantly lowered. Moving indoors is indicated by a decrease in cellular signal strength and an increase in WLAN signal strength. Background/Connectivity scanning frequency is increased to provide shorter time-to-connect to WLAN Networks for the user within the WLAN coverage area.
    Type: Application
    Filed: February 26, 2010
    Publication date: September 1, 2011
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Krishna Kumar Bakthavathsalu, Ion Barbu, Nayef Mendahawi, Ahmad Kholaif