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: 8483180
    Abstract: A method of optimizing reconnection of a point to point protocol link layer in a mobile device comprising the steps of: monitoring whether the mobile device has entered a new zone; starting a stabilization period when the mobile device enters a new zone; checking whether the mobile device enters a different zone during the stabilization period; if the mobile device enters a different zone during the stabilization period, restarting the stabilization period and performing the checking step; and if the mobile device does not enter a new zone during the stabilization period, determining whether the mobile device is in a new zone, reconnecting to the new zone if the mobile device is in the new zone, and otherwise performing no reconnection.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: July 9, 2013
    Assignee: Research In Motion Limited
    Inventors: Asif Hossain, Muhammad Khaledul Islam, Jin Kim
  • Patent number: 8472435
    Abstract: A method and system of reachability indication between a wireless device and at least one push server, the method comprising the steps of: sending device status information from the wireless device to the at least one push server; and receiving the status information at the at least one push server; wherein the at least one push server is enabled to selectively start and stop serving the wireless device on the basis of the status information. The method further comprises sending status information to a packet data serving node that stores a list of push servers associated with a wireless device, and having the packet data serving node forward the status information to the push server. The system and method further includes selectively starting and stopping the serving of the wireless device by the push server during a voice call.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: June 25, 2013
    Assignee: Research In Motion Limited
    Inventors: Wen Zhao, Xin Jin, Haining Zhang, Muhammad 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: 8457620
    Abstract: One illustrative technique for use in a mobile device having a visual display includes monitoring an operating temperature at the device and, when the monitored operating temperature is greater than a first threshold temperature, allowing only emergency communication and providing a visual indication indicating that only emergency communication is allowed.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: June 4, 2013
    Assignee: Research In Motion Limited
    Inventors: Xin Jin, Muhammad Khaledul Islam
  • Publication number: 20130130688
    Abstract: A method is provided for managing a priority call in a serving cell. The method comprises, when a priority call is in progress in the serving cell, performing at least one of preventing at least one non-priority call from being handed over into the serving cell and preventing at least one non-priority call from being initiated in the serving cell.
    Type: Application
    Filed: November 5, 2010
    Publication date: May 23, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen-Ho Chin, Stefano M. Faccin, Muhammad Khaledul Islam, Mo-Han Fong
  • 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
  • Publication number: 20130084855
    Abstract: The application relates to wireless network selection. The effect of wireless network selection upon operation time of the mobile device is considered in making the wireless network selection.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 4, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Ozgur Ekici, Muhammad Khaledul Islam, Dimitrios Prodanos, Jeffrey William Wirtanen
  • Patent number: 8406725
    Abstract: A method and apparatus for sending an event from user equipment operating in a mobile network, the method comprising the steps of: monitoring whether an unrelated opportunistic event has occurred; and sending said event with said unrelated opportunistic event.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: March 26, 2013
    Assignee: Research In Motion Limited
    Inventors: Thomas Leonard Trevor Plestid, Muhammad Khaledul Islam, Jeffrey William Wirtanen
  • Patent number: 8406151
    Abstract: A method and device for packet data service discovery are described. A mobile device memory stores a packet data services blacklist and a historical blacklist. The packet data services blacklist identifies wireless networks that do not provide packet data services to the mobile device. The packet data services blacklist is based on previous packet data service authentication rejections, is distinct from a voice services blacklist, and is updated in response to newly received packet data service authentication information. The historical blacklist is distinct from the packet data services blacklist and the voice services blacklist. The historical blacklist identifies wireless networks that are no longer in the packet data services blacklist and were once in the packet data services blacklist within a particular time period. No advance knowledge of data services roaming agreements is required, and unnecessary network access can be avoided, which in turn saves network resources and capacity.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: March 26, 2013
    Assignee: Research In Motion Limited
    Inventors: Muhammad Khaledul Islam, Asif Hossain
  • Patent number: 8391918
    Abstract: A method and a multi-mode mobile communication device operating said method are provided. The method comprises a multi-mode mobile communication device selecting a first data connection carried over a first radio access technology (RAT) based on a first requested QoS, and the multi-mode mobile communication device selecting a second data connection over a second RAT based on a second requested QoS. The multi-mode communication device comprises a first transceiver adapted to be connected to a server using the first RAT, a second transceiver adapted to be connected to the server using the second RAT, and a processor for carrying out the method.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: March 5, 2013
    Assignee: Research In Motion Limited
    Inventors: Ozgur Ekici, Dimitrios Prodanos, Muhammad Khaledul Islam
  • Publication number: 20130040697
    Abstract: A method at a mobile device, and the mobile device, the method selecting a subset of radio access technologies available to the mobile device over which a predetermined set of services on the mobile device is available; and deactivating monitoring, or reducing a monitoring frequency, of at least one radio access technology not within the selected subset of radio access technologies.
    Type: Application
    Filed: August 8, 2011
    Publication date: February 14, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Ozgur Ekici, Muhammad Khaledul Islam, Dimitrios Prodanos
  • Publication number: 20130039266
    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: August 8, 2011
    Publication date: February 14, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Ozgur Ekici, Muhammad Khaledul Islam
  • 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: 20130021919
    Abstract: A method and system for processing a signaling connection release indication between user equipment and a wireless network, the method comprising the steps of: monitoring, at the user equipment, whether a signaling connection release indication should be sent to the wireless network; appending, at the user equipment, a cause for the signaling connection release indication to the signaling connection release indication; sending the appended signaling connection release indication to the wireless network; receiving the signaling connection release indication at the wireless network; and filtering said cause to determine whether to raise an alarm.
    Type: Application
    Filed: August 16, 2012
    Publication date: January 24, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Muhammad Khaledul Islam, Jeffrey William Wirtanen, Gordon Peter Young
  • 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
  • Patent number: 8340590
    Abstract: A test apparatus for conducting a radiated performance test on a wireless device under controlled test conditions, the test apparatus having an anechoic chamber; a test computer; and an interface, the interface adapted to connect the test computer to the wireless device, the test apparatus being adapted to: establish a data connection on the interface between the test computer and the wireless device; initialize and start a timer for a predetermined interval on the wireless device; subject the wireless device to the radiated performance test in the anechoic chamber after the predetermined interval; and analyze test results on the test computer from a test log stored on the wireless device during the radiated performance test, wherein the interface between the test computer and the wireless device is adapted to be removed during the predetermined interval; for conducting a radiated performance test on a wireless device.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: December 25, 2012
    Assignee: Research In Motion Limited
    Inventors: Wen Zhao, Xin Jin, C. Nicolas Bungnariu, Muhammad Khaledul Islam, Fangyi Luo, Jiansheng Chen
  • Publication number: 20120320811
    Abstract: A method and apparatus for transitioning states or modes on a user equipment, the method having the steps of receiving, at a network element, a transition indication; checking a radio resource profile for the user equipment; and making a transitioning decision at the network element based on the received transition indication and the radio resource profile.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 20, 2012
    Applicant: Research In Motion Limited
    Inventors: Muhammad Khaledul ISLAM, Jeffrey WIRTANEN, Takeshi SUZUKI, Gordon Peter YOUNG, Claude ARZELIER
  • Patent number: 8335530
    Abstract: A mobile device is engaged in a connected data service via a wireless network. The connected data service utilizes a radio traffic channel established between the mobile device and the wireless network and a data session for communicating data. While engaged in the service, the mobile device receives via a user interface a voice call request for initiating a voice call. In response to the request, the mobile device permits the initiation of the voice call. Specifically, the mobile device causes the radio traffic channel for the connected data service to be torn down without terminating the data session. The mobile device also causes the voice call to be established and maintained over a new radio traffic channel via the wireless network while the data session for the data service is maintained.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: December 18, 2012
    Assignee: Research In Motion Limited
    Inventors: Shahid Rasul Chaudry, Muhammad Khaledul Islam