Patents by Inventor Shahid R. Chaudry
Shahid R. Chaudry 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).
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Patent number: 8767618Abstract: 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: GrantFiled: January 31, 2011Date of Patent: July 1, 2014Assignee: BlackBerry LimitedInventors: M. Khaledul Islam, Shahid R. Chaudry, William Daniel Willey
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Publication number: 20120088513Abstract: 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: ApplicationFiled: December 16, 2011Publication date: April 12, 2012Applicant: RESEARCH IN MOTION LIMITEDInventors: Shahid R. Chaudry, M. Khaledul Islam
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Patent number: 8121637Abstract: A system and method for establishing and maintaining an “always-on” data connection to a wireless network through the use of a back off timer and a service check timer is disclosed. The back off timer is initialized to a determined value when a connection is not established. When the timer expires, a connection attempt is made. As further connection attempts are made, the back off timer is set to ever-increasing values. When the data connection is established, the service check timer is initialized. The data connection status is determined at the expiry of the service check timer. When, at the expiry of the service check timer, the data connection is determined to be lost, the connection method is employed.Type: GrantFiled: October 15, 2010Date of Patent: February 21, 2012Assignee: Research In Motion LimitedInventors: Wen Zhao, Shahid R. Chaudry, T. L. Trevor Plestid, Hao Xue, Grace T. Y. Yeung, Clifford W. Yanoshewski
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Publication number: 20110122847Abstract: 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: ApplicationFiled: January 31, 2011Publication date: May 26, 2011Inventors: M. Khaledul Islam, Shahid R. Chaudry, William Daniel Willey
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Patent number: 7911996Abstract: 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: GrantFiled: February 11, 2005Date of Patent: March 22, 2011Assignee: Research In Motion LimitedInventors: M. Khaledul Islam, Shahid R. Chaudry, William Daniel Willey
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Publication number: 20110034199Abstract: A system and method for establishing and maintaining an “always-on” data connection to a wireless network through the use of a back off timer and a service check timer is disclosed. The back off timer is initialized to a determined value when a connection is not established. When the timer expires, a connection attempt is made. As further connection attempts are made, the back off timer is set to ever-increasing values. When the data connection is established, the service check timer is initialized. The data connection status is determined at the expiry of the service check timer. When, at the expiry of the service check timer, the data connection is determined to be lost, the connection method is employed.Type: ApplicationFiled: October 15, 2010Publication date: February 10, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen ZHAO, Shahid R. CHAUDRY, T. L. Trevor PLESTID, Hao XUE, Grace T.Y. YEUNG, Clifford W. YANOSHEWSKI
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Publication number: 20110021204Abstract: A voice call request for a voice call involving the mobile device is received in a wireless network while the mobile device is engaged in a connected data communication service via the wireless network. The service utilizes a radio traffic channel between the mobile device and the wireless network and a data session for communication of data. In response to the receiving of the voice call request, the wireless network causes the radio traffic channel for the service to be torn down without terminating the data session. The wireless network also causes a voice call involving the mobile device to be established and maintained over a new radio traffic channel via the wireless network while the data session for the service is maintained. Subsequently, the wireless network identifies an indication that the voice call involving the mobile device has ended and, in response, resumes the communication of the data in the data session over a radio traffic channel.Type: ApplicationFiled: October 4, 2010Publication date: January 27, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Shahid R. Chaudry, M. Khaledul Islam
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Patent number: 7818025Abstract: A system and method for establishing and maintaining an “always-on” data connection to a wireless network through the use of a back off timer and a service check timer is disclosed. The back off timer is initialized to a determined value when a connection is not established. When the timer expires, a connection attempt is made. As further connection attempts are made, the back off timer is set to ever-increasing values. When the data connection is established, the service check timer is initialized. The data connection status is determined at the expiry of the service check timer. When, at the expiry of the service check timer, the data connection is determined to be lost, the connection method is employed.Type: GrantFiled: June 16, 2003Date of Patent: October 19, 2010Assignee: Research In Motion LimitedInventors: Wen Zhao, Shahid R. Chaudry, T. L. Trevor Plestid, Hao Xue, Grace T. Y. Yeung, Clifford W. Yanoshewski
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Patent number: 7809387Abstract: Methods and apparatus for prioritizing voice call requests during data communication sessions involving a mobile communication device are disclosed. In one illustrative example, an end user invokes a voice call request though a user interface of the mobile device. If this request is made while the mobile device is engaged in a connected data communication service, the mobile device immediately forces the connected data service into a dormant state. In particular, a release order is transmitted to tear down a traffic channel of the connected data service so that the voice call request can be processed. Subsequently, a voice call with the mobile device is established using a new traffic channel. When the voice call is completed, data communications will resume if needed. Advantageously, the mobile device prioritizes voice calls over data communication sessions which may be deemed less time-critical.Type: GrantFiled: September 22, 2003Date of Patent: October 5, 2010Assignee: Research In Motion LimitedInventors: Shahid R. Chaudry, M. Khaledul Islam
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Patent number: 7715868Abstract: A system and method for establishing and maintaining an “always-on” data connection to a wireless network through the use of a back off timer and a service check timer is disclosed. The back off timer is initialized to a determined value when a connection is not established. When the timer expires, a connection attempt is made. As further connection attempts are made, the back off timer is set to ever-increasing values. When the data connection is established, the service check timer is initialized. The data connection status is determined at the expiry of the service check timer. When, at the expiry of the service check timer, the data connection is determined to be lost, the connection method is employed.Type: GrantFiled: October 30, 2007Date of Patent: May 11, 2010Assignee: Research In Motion LimitedInventors: Wen Zhao, Shahid R. Chaudry, T. L. Trevor Plestid, Hao Xue, Grace T. Y. Yeung, Clifford W. Yanoshewski
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Patent number: 7646753Abstract: A system and method for an automatic retry method during initial registration and re-registration of a mobile device on a mobile Internet Protocol (MIP) network is provided. The mobile device is adapted to categorise a registration response (RRP) code and accordingly determine a course of action. By reacting intelligently to the RRP code category, the mobile device is able to maintain a point to point protocol (PPP) connectivity and achieve “always-on” status.Type: GrantFiled: January 10, 2005Date of Patent: January 12, 2010Assignee: Research In Motion LimitedInventors: M. Khaledul Islam, Jin Kim, Shahid R. Chaudry
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Patent number: 7409204Abstract: A method for eliminating voicemail notifications on a wireless device for a voicemail message that a user has previously been notified of, comprising the steps of: storing information on the wireless device about the voicemail message; comparing incoming information of a new voicemail notification received by the wireless device against the information stored in the storing step; and notifying the user of the voicemail message only if the incoming information differs from the information stored in the storing step.Type: GrantFiled: December 4, 2003Date of Patent: August 5, 2008Assignee: Research In Motion LimitedInventors: Shahid R. Chaudry, M. Khaledul Islam
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Patent number: 6553230Abstract: A method for allowing a mobile station to find a code transmitted by a base station which has a propagation delay to the mobile station which is much larger or smaller than a propagation delay between the mobile station and a base station from which it derived a time reference is provided. In the context of IS-95, a PN offset is sent to the mobile station to identify which target base station pilot signals to search for. By sending a virtual PN offset which differs from the real PN offset, the mobile station can find the target base station signals where normally they would fall outside the mobile station's search window.Type: GrantFiled: April 16, 1999Date of Patent: April 22, 2003Assignee: Nortel Networks LimitedInventors: Trevor T. Plestid, Azeem Ahmad, Michael S. Crowe, Sarvesh R. Sharma, Shahid R. Chaudry, Neil McGowan