Patents by Inventor M. Khaledul Islam

M. Khaledul Islam 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: 9554317
    Abstract: A user equipment (UE) including one or more processors configured to cause the UE to prepare to reselect to a macro cell responsive to the UE placing an emergency call in a femtocell, wherein preparing to reselect is performed in addition to placing the emergency call.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: January 24, 2017
    Assignee: BlackBerry Limited
    Inventors: Stefano M. Faccin, Young Ae Kim, Johanna L. Dwyer, Mo-Han Fong, David P. Hole, M. Khaledul Islam, Paul Carpenter, Jeffrey William Wirtanen, Maiyuran Wijayanathan
  • Patent number: 9237509
    Abstract: Systems and methods for determining that a maximum number of IP sessions have been established are provided. There are instances when the mobile device transmits a request to the wireless network. According to an aspect, in the event that the maximum number of IP sessions is already established for the mobile device, the wireless network transmits a response indicating that the request cannot be fulfilled. The mobile device determines based on the response that the maximum number of IP sessions is already established, which allows the mobile device to determine the maximum number of IP sessions that can be supported so that IP sessions can be managed accordingly.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: January 12, 2016
    Assignee: BlackBerry Limited
    Inventors: Jeff Wirtanen, Jin Kim, M. Khaledul Islam, Trevor Plestid
  • Patent number: 9185216
    Abstract: A method is provided for indicating an IMS (Internet Protocol Multimedia Subsystem) emergency call back to a user equipment and an access network. The method comprises including in a message from a PSAP (Public Safety Answering Point) to the user equipment and the access network an indication that the emergency call back is from the PSAP.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: November 10, 2015
    Assignee: BlackBerry Limited
    Inventors: Rene W. Purnadi, M. Khaledul Islam
  • Patent number: 9055517
    Abstract: A mobile device configured for communication in both packet and circuit switched domains. The mobile device includes a domain selector. The domain selector is configured, responsive to selection by a user of one of the packet switched and circuit switched domains, to promote mobile device communication via the selected one of the packet switched and circuit switched domains.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: June 9, 2015
    Assignee: BlackBerry Limited
    Inventors: Rene W. Purnadi, M. Khaledul Islam
  • Patent number: 8983532
    Abstract: A method and apparatus for allowing varied functionality between a sending entity and a receiving entity, the method sending a first message from the sending entity to the receiving entity utilizing a first protocol, detecting an indication that the receiving entity did not recognize the first message or that the receiving entity did not fulfill a request in the first message, and sending a second message from the sending entity to the receiving entity utilizing a second protocol.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: March 17, 2015
    Assignee: BlackBerry Limited
    Inventors: Claude Jean-Frederic Arzelier, M. Khaledul Islam
  • Patent number: 8811935
    Abstract: A user equipment (UE) comprising a processor configured to cause the UE to transmit an emergency calls required indicator (ECRI) to a network component responsive to the UE receiving an instruction to place an emergency call; and to receive an emergency calls supported indicator (ECSI) prior to placing an emergency call, wherein a value of the ECSI indicates a type of emergency services supported by a femtocell, where the processor is further configured to cause the UE to transmit the ECRI before receiving the ECSI.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: August 19, 2014
    Assignee: BlackBerry Limited
    Inventors: Stefano M. Faccin, Young Ae Kim, Johanna L. Dwyer, Mo-Han Fong, David Philip Hole, M. Khaledul Islam, Paul Marcus Carpenter, Jeffrey William Wirtanen, Maiyuran Wijayanathan
  • Patent number: 8787334
    Abstract: Methods are provided for transitioning between SIP and MIP. Mobile devices, upon detecting a new system, automatically attempt a MIP session to avoid the default position of SIP. A history is maintained of systems visited, and for systems that did not support MIP in the past, a MIP session is not attempted, but rather SIP is initiated from the start.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: July 22, 2014
    Assignee: Blackberry Limited
    Inventors: M. Khaledul Islam, Hao Xue, Jin Kim
  • Patent number: 8774805
    Abstract: Systems and methods for radio access technology specific routing for multi-mode mobile devices are provided. For each of a number of radio access technologies supported by a mobile device, the mobile device is configured to use respective routing information. This has the advantage of allowing radio access technology specific processing to be performed.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: July 8, 2014
    Assignee: Blackberry Limited
    Inventors: Jean-Philippe Cormier, Trevor Plestid, M. Khaledul Islam
  • Patent number: 8767618
    Abstract: Methods, mobile stations and networks are provided that cause a packet data service reconnect to be performed automatically after the occurrence of an event triggering registration, even in some circumstances where such a data service reconnect would not normally occur. This avoids complications that can arise due to the packet data service being discontinued upon registration and the resulting inability to reach the mobile station.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: July 1, 2014
    Assignee: BlackBerry Limited
    Inventors: M. Khaledul Islam, Shahid R. Chaudry, William Daniel Willey
  • Patent number: 8725144
    Abstract: An apparatus and method is provided for making use of black-list network information to make scanning more efficient in multi-mode mobile devices. When performing a scan for a network, if a network that is blacklisted is found, scanning is discontinued for any network that has the same radio access technology as the network that was found. Thus, excessive scanning that can be costly for the mobile device in terms of battery life and responsiveness to provide service, is avoided.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: May 13, 2014
    Assignee: BlackBerry Limited
    Inventors: M. Khaledul Islam, Asif Hossain
  • Patent number: 8687586
    Abstract: Systems and Method are provided for managing IP sessions based on how many IP sessions are supported. According to an embodiment of the application, the wireless network determines how many IP sessions can be supported for the mobile device residing in a given area such as a routing area, and to transmit to the mobile device an identification of how many IP sessions can be supported. According to another embodiment of the application, the mobile device receives the identification of how many IP sessions can be established, and manages IP sessions based on the identification. Since the mobile device is privy to how many IP sessions can be established, the mobile device is able to properly manage IP sessions.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: April 1, 2014
    Assignee: BlackBerry Limited
    Inventors: Jeff Wirtanen, M. Khaledul Islam, Trevor Plestid
  • Patent number: 8655613
    Abstract: A method includes measuring an operating parameter of a battery of a mobile device. The measured operating parameter is translated into an equivalent series resistance (ESR) value. The ESR value is adjusted by a correction factor to generate a corrected ESR value. The capacity of the battery is determined based on the corrected ESR value. The correction factor is automatically calibrated based on the measured operating parameter.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 18, 2014
    Assignee: BlackBerry Limited
    Inventors: Xin Jin, Calin N. Bugnariu, M. Khaledul Islam, Samir R. Shah, Stephen L. Pomeroy, Reguina Bouianovskaia, Junhong Nie
  • Publication number: 20140003354
    Abstract: A system information message is communicated between a wireless access network node and an electronic device, where the system information message includes multiple retry time values for different network domains, for different connection types, or for different combinations of network domains and connection types.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Inventors: Ozgur EKICI, M. Khaledul ISLAM
  • Patent number: 8542675
    Abstract: A system and method of notifying a user of events in a customizable manner during and not during a voice call is provided. According to one aspect, the notifications are configurable to be dependant on whether or not there is an active voice call. Notifications may also be configured to be different depending on whether or not the wireless device is inside a device holster. Notifications can be configured to be different for different events so that the user may be able to associate certain notifications with certain events. The user can also configure the type of events that trigger notification. Notifications include any combination of audible cues, visual cues, and vibration cues.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: September 24, 2013
    Assignee: BlackBerry Limited
    Inventors: Jean-Philippe Cormier, Jin Kim, M. Khaledul Islam
  • Patent number: 8467765
    Abstract: A method in a mobile device includes receiving an incoming call. An emergency signal, associated with an incoming call, is detected. The emergency signal indicates the incoming call is from an emergency call center. Responsive to detecting the emergency signal, the emergency call is automatically answered, and information identifying the incoming call as an emergency call is displayed on the mobile device.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: June 18, 2013
    Assignee: Research In Motion Limited
    Inventors: M. Khaledul Islam, William Daniel Willey, Luis P. Estable
  • Patent number: 8463269
    Abstract: Provided is a system and method of wireless network selection based on service offered. The wireless device scans for available wireless networks upon an event triggering registration. If the wireless device determines based on its SIM that none of the available wireless networks are high priority networks for registration, then the wireless device automatically selects an available wireless network for registration based on, for at least one of the available wireless networks that the wireless device previously registered to, whether CS (Circuit Switched) service was rejected but PS (Packet Switched) service was allowed. Next, the wireless device automatically attempts to register with the selected wireless network. In this manner, the wireless device attempts to register with a wireless network that does not reject CS service while allowing PS service. If the wireless device nonetheless registers with such a wireless network, then registration can be reattempted with another available wireless network.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: June 11, 2013
    Assignee: Research In Motion Limited
    Inventors: Omer Mubarek, Jeffrey Wirtanen, M. Khaledul Islam, Richard Sims, Trevor Plestid
  • Patent number: 8447877
    Abstract: In accordance with the teachings described herein, systems and methods are provided for always-on wireless IP communication. An access provider network (APN) that includes an always-on packet data serving node (PDSN) may be used to communicate over a wireless communication link with a mobile station. The PDSN may include an inactivity timer and may be used to set the inactivity timer to an inactivity timer starting value and send a starting value estimate to the mobile station over the wireless communication link, wherein the starting value estimate is a function of the inactivity timer starting value. The mobile station may include an inactivity timer estimate and may be used to receive the starting value estimate and set the inactivity timer estimate to the starting value estimate. The mobile station may also be used to reset the inactivity timer estimate to the starting value estimate when the mobile station communicates with the APN.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: May 21, 2013
    Assignee: Research In Motion Limited
    Inventors: Hao Xue, William Daniel Willey, M. Khaledul Islam, Shahid Chaudry
  • Patent number: 8428566
    Abstract: A network entity, method and system for providing supplementary services to a mobile device while roaming. The network entity comprises a receiver, a converter and an output. The receiver is for receiving a first message from a mobile device being provided roaming service by a first network, the first message being in a transport protocol supported by the first network and having embedded therein an invocation message based on for invocation of at least one supplementary service offered by a second network. The converter is for extracting the invocation message from the first message. The output is for sending the invocation message to the second network using a protocol used by the second network to invoke supplementary services.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: April 23, 2013
    Assignee: Research In Motion Limited
    Inventors: M. Khaledul Islam, Asif Hossain
  • Patent number: 8364199
    Abstract: Methods are provided for a multi-mode mobile station to perform multi-mode system selection using a multi-mode system selection algorithm as a function of multi-mode overlay information. The multi-mode overlay information includes a plurality of associations, each association being between a respective set of systems that serve at least a common geographical area, at least some of the associations being between systems using differing radio access technology. Methods are also provided for a system to prepare multi-mode overlay information that includes a plurality of associations and send the multi-mode overlay information to the mobile station.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: January 29, 2013
    Assignee: Research In Motion Limited
    Inventors: Hao Xue, M. Khaledul Islam, William Daniel Willey
  • Publication number: 20130010758
    Abstract: Systems and methods for determining that a maximum number of IP sessions have been established are provided. There are instances when the mobile device transmits a request to the wireless network. According to an aspect, in the event that the maximum number of IP sessions is already established for the mobile device, the wireless network transmits a response indicating that the request cannot be fulfilled. The mobile device determines based on the response that the maximum number of IP sessions is already established, which allows the mobile device to determine the maximum number of IP sessions that can be supported so that IP sessions can be managed accordingly.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 10, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Jeff WIRTANEN, Jin KIM, M. Khaledul ISLAM, Trevor PLESTID