Patents by Inventor Khaledul Islam

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: 9730147
    Abstract: A user equipment (UE) determines whether the UE is camped on a highest priority network. The UE being configured to scan for a higher priority network even though the UE is already camped on the highest priority network as specified in a network selector data structure that identifies networks and that indicates respective priorities of the identified networks. In response to determining that the UE is camped on the highest priority network, the UE stops scanning for a higher priority network.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: August 8, 2017
    Assignee: BLACKBERRY LIMITED
    Inventors: Jeffrey William Wirtanen, Muhammad Khaledul Islam
  • Publication number: 20170208517
    Abstract: Techniques for use in selecting a base station transceiver system for communication with a mobile station are described. The mobile station is connected to a first base station transceiver system, and scans to identify a second base station transceiver system for communication. The mobile station further identifies that the second base station transceiver system provides a predetermined communication service, and that the first base station transceiver system fails to provide the predetermined communication service. In response to identifying, the mobile station causes the second base station transceiver system to be selected for communication over the first base station transceiver system even if the signal quality of the second base station transceiver system is worse than that of the first base station transceiver system.
    Type: Application
    Filed: April 4, 2017
    Publication date: July 20, 2017
    Inventors: Muhammad Khaledul ISLAM, Asif HOSSAIN
  • Patent number: 9661611
    Abstract: A method and apparatus for improved battery performance of user equipment in a wireless network having multiple radio resource control (RRC) states, the method comprising the steps of: monitoring, at the user equipment, application data exchange; determining when no application on the user equipment is expected to exchange data; and initiating, from the user equipment, a transition to a less battery demanding radio resource control state or mode.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: May 23, 2017
    Assignee: BlackBerry Limited
    Inventors: Muhammad Khaledul Islam, Jeffery Wirtanen
  • Patent number: 9642076
    Abstract: Techniques for use in selecting a base station transceiver system for communication with a mobile station are described. The mobile station is connected to a first base station transceiver system, and scans to identify a second base station transceiver system for communication. The mobile station further identifies that the second base station transceiver system provides a predetermined communication service, and that the first base station transceiver system fails to provide the predetermined communication service. In response to identifying, the mobile station causes the second base station transceiver system to be selected for communication over the first base station transceiver system even if the signal quality of the second base station transceiver system is worse than that of the first base station transceiver system.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: May 2, 2017
    Assignee: BlackBerry Limited
    Inventors: Muhammad Khaledul Islam, Asif Hossain
  • Publication number: 20170118203
    Abstract: A method for handling authentication failures in a wireless communication system includes transmitting, by a user equipment (UE) and via a first cell, a first plurality of messages including at least one of AUTHENTICATION AND CIPHERING FAILURE messages or AUTHENTICATION FAILURE messages, where two or more of the first plurality of messages indicate at least one of synch failure or medium access control (MAC) failure, and where the UE includes at least one of a subscriber identity module (SIM) or universal SIM; receiving at least one of an AUTHENTICATION REJECT message or an AUTHENTICATION AND CIPHERING REJECT message subsequent to transmitting the two or more of the first plurality of messages indicating at least one of synch failure or MAC failure; and in response to receiving the at least one of an AUTHENTICATION REJECT message or an AUTHENTICATION AND CIPHERING REJECT message, transmitting an ATTACH message via a second cell.
    Type: Application
    Filed: October 26, 2016
    Publication date: April 27, 2017
    Applicant: BlackBerry Limited
    Inventors: Jeffrey William WIRTANEN, Muhammad Khaledul ISLAM, Jan Hendrik Lucas BAKKER
  • Patent number: 9560657
    Abstract: A method and apparatus for radio resource management in a wireless device is provided. A type of data connection to be established between the wireless device and a network is determined. A radio resource capability mode for the data connection based on resource requirements of the determined type of data connection is dynamically determined wherein the radio resource capability mode is selected from a plurality of radio resource capability modes operable by the wireless device within wireless technologies supported by the network. The determined radio resource capability mode is conveyed to the network during connection establishment between the wireless device and the network, wherein the radio resource capability mode is used by the network to determine radio resources to be allocated to the wireless device for the connection.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: January 31, 2017
    Assignee: BlackBerry Limited
    Inventors: Ozgur Ekici, Muhammad Khaledul Islam
  • 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
  • Publication number: 20170013672
    Abstract: A method and network element for sending a transition indication to transition a user equipment to a different state or mode, the method receiving a configuration message from a network; and transmitting a transition indication from the user equipment, the transition indication only includes a cause if the configuration message contains an inhibit transition indication. Also, a method and user equipment for processing a transitioning indication from a user equipment indicating the user equipment desires a transition to a different state or mode, the method comprising: receiving the transition indication from the user equipment; if the transition indication contains a cause: releasing a signaling connection of the user equipment or transitioning the user equipment to a different state or mode; and if the transition indication does not contain the cause: releasing the signaling connection.
    Type: Application
    Filed: September 22, 2016
    Publication date: January 12, 2017
    Applicant: BlackBerry Limited
    Inventors: Muhammad Khaledul ISLAM, Jeffrey William WIRTANEN, Takashi SUZUKI, Gordon Peter YOUNG, Claude Jean-Frederic ARZELIER
  • Patent number: 9544806
    Abstract: A method and apparatus for handling congestion in a mobile telecommunications system is described, the method comprising, at the user equipment monitoring messages from a cell for an indication of congestion and handing the congestion in a battery and signaling efficient manner. By one approach this comprises sending a first message to a cell, receiving a rejection (or failing to receive an acknowledgement of the message) within a period and in response, monitoring messages from the cell for an indication of congestion.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: January 10, 2017
    Assignee: BlackBerry Limited
    Inventors: Ozgur Ekici, Muhammad Khaledul Islam, Andrew John Farnsworth
  • Patent number: 9538344
    Abstract: A method and apparatus for automatically sending a data message from a mobile device to at least one recipient during or soon after an emergency voice call, the method having the steps of: determining whether the data message can be sent over the network during the emergency voice call, and if yes, creating and sending the data message; and if no, waiting until either the mobile device connects to a new network, wherein the method proceeds back to said determining step, or until the voice call has ended and then creating and sending the data message.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: January 3, 2017
    Assignee: BlackBerry Limited
    Inventors: Muhammad Khaledul Islam, Jean-Philippe Cormier, Farhad Ahmed
  • Publication number: 20160345251
    Abstract: Techniques for use in selecting a base station transceiver system for communication with a mobile station are described. The mobile station is connected to a first base station transceiver system, and scans to identify a second base station transceiver system for communication. The mobile station further identifies that the second base station transceiver system provides a predetermined communication service, and that the first base station transceiver system fails to provide the predetermined communication service. In response to identifying, the mobile station causes the second base station transceiver system to be selected for communication over the first base station transceiver system even if the signal quality of the second base station transceiver system is worse than that of the first base station transceiver system.
    Type: Application
    Filed: August 8, 2016
    Publication date: November 24, 2016
    Inventors: Muhammad Khaledul ISLAM, Asif HOSSAIN
  • Patent number: 9467917
    Abstract: A method at a user equipment for establishing a circuit switched call, the user equipment being in a Cell Forward Access CHannel (CELL_FACH) state, a Cell Paging CHannel (CELL_PCH) state or a UTRAN Registration Area Paging CHannel (URA_PCH) state, the method receiving an indication that a circuit switched call is pending; sending to a network element a message to facilitate the user equipment to transition to a Cell Dedicated CHannel (CELL_DCH) state, the message being one of a cell update message having a traffic volume indicator information element indicating that pending uplink data exceeds a threshold or an RRCConnectionRequest message; and establishing the circuit switched call.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: October 11, 2016
    Assignee: BlackBerry Limited
    Inventors: Andrew John Farnsworth, Vaibhav Singh, Muhammad Khaledul Islam, Ozgur Ekici
  • Patent number: 9456436
    Abstract: A method and network element for sending a transition indication to transition a user equipment to a different state or mode, the method receiving a configuration message from a network; and transmitting a transition indication from the user equipment, the transition indication only includes a cause if the configuration message contains an inhibit transition indication. Also, a method and user equipment for processing a transitioning indication from a user equipment indicating the user equipment desires a transition to a different state or mode, the method comprising: receiving the transition indication from the user equipment; if the transition indication contains a cause: releasing a signaling connection of the user equipment or transitioning the user equipment to a different state or mode; and if the transition indication does not contain the cause: releasing the signaling connection.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: September 27, 2016
    Assignee: BlackBerry Limited
    Inventors: Gordon Peter Young, Takashi Suzuki, Claude Jean-Frederic Arzelier, Muhammad Khaledul Islam, Jeffrey William Wirtanen
  • Publication number: 20160242079
    Abstract: A method, at a user equipment (‘UE’), the method: sending a request to a first network for Circuit Switched Fallback (‘CSFB’); receiving, responsive to the request, redirection information; acquiring a second network based on the redirection information; initiating establishment of Circuit Switched (‘CS’) voice radio bearers with the second network; waiting for a predetermined event to occur; after the predetermined event has occurred, establishing a Packet Switched (‘PS’) connection with the second network. Further, a method, at a network element, the method receiving a request for Circuit Switched Fallback (‘CSFB’) from a user equipment (‘UE’); sending, to the UE, redirection information; receiving a Routing Area Update (‘RAU’) message from the UE; waiting for a predetermined event to occur; upon the predetermined event occurring, responding to the RAU message.
    Type: Application
    Filed: April 25, 2016
    Publication date: August 18, 2016
    Inventors: Muhammad Khaledul ISLAM, Jeffrey William WIRTANEN
  • Patent number: 9414278
    Abstract: Techniques for use in selecting a base station transceiver system for communication with a mobile station are described. The mobile station is connected to a first base station transceiver system, and scans to identify a second base station transceiver system for communication. The mobile station further identifies that the second base station transceiver system provides a predetermined communication service, and that the first base station transceiver system fails to provide the predetermined communication service. In response to identifying, the mobile station causes the second base station transceiver system to be selected for communication over the first base station transceiver system even if the signal quality of the second base station transceiver system is worse than that of the first base station transceiver system.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: August 9, 2016
    Assignee: BlackBerry Limited
    Inventors: Muhammad Khaledul Islam, Asif Hossain
  • Publication number: 20160219576
    Abstract: A method and apparatus for radio resource management in a wireless device is provided. A type of data connection to be established between the wireless device and a network is determined. A radio resource capability mode for the data connection based on resource requirements of the determined type of data connection is dynamically determined wherein the radio resource capability mode is selected from a plurality of radio resource capability modes operable by the wireless device within wireless technologies supported by the network. The determined radio resource capability mode is conveyed to the network during connection establishment between the wireless device and the network, wherein the radio resource capability mode is used by the network to determine radio resources to be allocated to the wireless device for the connection.
    Type: Application
    Filed: April 4, 2016
    Publication date: July 28, 2016
    Applicant: BlackBerry Limited
    Inventors: Ozgur EKICI, Muhammad Khaledul ISLAM
  • Publication number: 20160205040
    Abstract: In some implementations, a method includes receiving a connection request from a user application. A service request is sent to a radio resource control (RRC) module. An indication of failure of or a rejection to the service request due to access class barring is received from the RRC module. A retry of the user application connection request is prevented until expiration of an access-class-barring timer of the RRC module that resulted in the access class barring.
    Type: Application
    Filed: March 23, 2016
    Publication date: July 14, 2016
    Applicant: BlackBerry Limited
    Inventors: Jeffrey William WIRTANEN, Muhammad Khaledul ISLAM
  • Publication number: 20160191198
    Abstract: A method and apparatus for explicit adaptive modulation and coding scheme selection, the method receiving, at a mobile device, a transport block targeted to the mobile device, and if a quality of the received transport block exceeds a threshold, providing an acknowledgment or negative acknowledgment to a network element; and if the quality of the received transport block is below the threshold, suppressing the acknowledgment or negative acknowledgement.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 30, 2016
    Inventors: Ozgur EKICI, Muhammad Khaledul ISLAM
  • Patent number: 9369953
    Abstract: A method in a first wireless device, the method performing wireless network scanning to discover available wireless networks; and communicating results of the scanning to a second wireless device, the results containing information to enable the second wireless device to connect to at least one of the available wireless networks without the second wireless device having to perform the same wireless network scanning or reduce the amount of scanning required to connect to at least one of the available wireless network. Also a method in a first wireless device, the method receiving results of wireless network scanning performed on a second wireless device, the results containing information enabling the first wireless device to connect to at least one available wireless network discovered during the scanning without the first wireless device having to perform the same wireless network scanning.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: June 14, 2016
    Assignee: BlackBerry Limited
    Inventors: Ozgur Ekici, Muhammad Khaledul Islam
  • Publication number: 20160157150
    Abstract: A method performed by a mobile device of selecting a cellular network entails activating a cellular radio transceiver, scanning a most recently used frequency list of radiofrequency channels most recently used by the cellular radio transceiver of the mobile device, scanning a likely frequency list of likely radiofrequency channels available at a plurality of locations where activation of cellular radio transceivers commonly occurs, and selecting the cellular network by identifying one of the radiofrequency channels as a usable channel.
    Type: Application
    Filed: November 27, 2014
    Publication date: June 2, 2016
    Inventors: Jeffrey William WIRTANEN, Muhammad Khaledul ISLAM, Yi Hai ZHANG