Patents by Inventor Ragulan Sinnarajah

Ragulan Sinnarajah 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: 7796631
    Abstract: Method and a system for multicast service notification in cellular telephone system to enable the cellular telephone systems to provide both multicast and point-to-point services are disclosed. Several embodiments describe the signaling interaction between an access network and subscriber stations belonging to a multicast group to allow the access network to assign a channel conveying the multicast service between the access network and the subscriber stations.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: September 14, 2010
    Assignee: Qualcomm Incorporated
    Inventors: Ragulan Sinnarajah, Jun Wang, Nikolai K. N. Leung, Tao Chen
  • Patent number: 7778593
    Abstract: Method and apparatus for detection and selection of Wireless Local Area Network (WLAN) service. A cellular network may provide an advertisement for a WLAN, such as in an overhead signaling message. The advertisement may identify the Access Point(s) by an Extended Service Set Identifier (ESSID). The remote station may then scan for the WLAN service automatically or manually.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: August 17, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Raymond T-S Hsu, Ragulan Sinnarajah
  • Patent number: 7778631
    Abstract: Techniques for synchronization of stored service parameters are disclosed. In one aspect, a configuration identifier is transmitted from a mobile station to a base station, and compared with an identifier generated in the base station. If the identifiers match, the configuration is used for communication. In another aspect, the identifier is generated by selecting an identifier associated with a configuration from a configuration table. In yet another aspect, the identifier is generated by computing a cyclic redundancy check (CRC) of the configuration. Various other aspects are also presented. These aspects have the benefit of preventing attempted use of unsynchronized stored service parameters and associated call setup failures and subsequent renegotiation, with the net effect of reducing call setup time and more efficient use of system resources.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: August 17, 2010
    Assignee: Qualcomm Incorporated
    Inventors: Sai Yiu Duncan Ho, Edward G. Tiedemann, Jr., Jun Wang, Ragulan Sinnarajah, Ramin Rezaiifar
  • Patent number: 7751821
    Abstract: A method for managing a point-to-point call initiated (702) between a wireless mobile station (114, 400) and a remote party while the mobile is receiving broadcast content via one or more multi-user forward-link broadcast channels (508). The mobile station notifies (704) the network (110) of preferences as to prescribed categories of operating conditions, such as whether to continue receiving the broadcast content, and election between the point-to-point call and the broadcast content should network resources be unable to conduct the point-to-point call and broadcast content concurrently. In accordance with the preferences, communications are conducted (706) in one of the following operating modes: (1) conducting the point-to-point call and discontinuing reception of the broadcast, (2) conducting the point-to-point call and continuing reception of the broadcast, (3) aborting completion of the point-to-point call and continuing reception of the broadcast.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: July 6, 2010
    Assignee: Qualcomm Incorporated
    Inventors: Ragulan Sinnarajah, Jun Wang, Tao Chen
  • Patent number: 7747283
    Abstract: Techniques for synchronization of stored service parameters are disclosed. In one aspect, a configuration identifier is transmitted from a mobile station to a base station, and compared with an identifier generated in the base station. If the identifiers match, the configuration is used for communication. In another aspect, the identifier is generated by selecting an identifier associated with a configuration from a configuration table. In yet another aspect, the identifier is generated by computing a cyclic redundancy check (CRC) of the configuration. Various other aspects are also presented. These aspects have the benefit of preventing attempted use of unsynchronized stored service parameters and associated call setup failures and subsequent renegotiation, with the net effect of reducing call setup time and more efficient use of system resources.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: June 29, 2010
    Assignee: Qualcomm Incorporated
    Inventors: Sai Yiu Duncan Ho, Edward G. Tiedemann, Jr., Jun Wang, Ragulan Sinnarajah, Ramin Rezaiifar
  • Patent number: 7738832
    Abstract: A wireless communications network (100) includes various base stations (110) and subscriber-stations (114). The base stations each provide (602) broadcast content services to subscriber-stations over communication channels of one of the following types: 1) shared channels for use by multiple subscriber-stations, 2) individual channels each dedicated for use by an individual subscriber-station. In response to one or more prescribed condition changes (604), there is a switch (606) in the type of communications channel used to provide broadcast content services to one or more given subscriber-stations.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: June 15, 2010
    Assignee: Qualcomm Incorporated
    Inventors: Ragulan Sinnarajah, Jun Wang, Tao Chen
  • Publication number: 20100144361
    Abstract: Method and apparatus for hashing mobile stations to frequencies in a communication system. The method uses two-level hashing to assign a mobile station first to a frequency band and then to a specific frequency within the frequency band. Embodiments allow for weights to be assigned to frequencies and mobiles hashed to the weighted frequencies. Weighting allows for a non-uniform distribution of mobile stations among frequencies to optimize system operating parameters.
    Type: Application
    Filed: February 17, 2010
    Publication date: June 10, 2010
    Inventors: Aziz Gholmieh, Peter Gaal, Ragulan Sinnarajah
  • Patent number: 7693508
    Abstract: Methods and apparatus for providing broadcast overhead information interleaved with a broadcast session in a transmission on a broadcast channel of a wireless communication system. In one embodiment, the information identifies parameters and a protocol stack for processing broadcast content. In one embodiment, the information is stored at the receiver to provide quick updating when a user changes to an alternate broadcast channel.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: April 6, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Nikolai K. N. Leung, Ragulan Sinnarajah
  • Patent number: 7689227
    Abstract: Method and apparatus for hashing mobile stations to frequencies in a communication system. The method uses two-level hashing to assign a mobile station first to frequency band and then to a specific frequency within the frequency band. Embodiments allow for weights to be assigned to frequencies and mobiles hashed to the weighted frequencies. Weighting allows for a non-uniform distribution of mobile stations among frequencies to optimize system operating parameters.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: March 30, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Aziz Gholmieh, Peter Gaal, Ragulan Sinnarajah
  • Patent number: 7689226
    Abstract: A method and a system for providing signaling in cellular telephone system providing broadcast services to fully integrate broadcast services with the services provided by the cellular telephone systems. The signaling method coordinate interaction between an access network and the subscriber station to allowing the subscriber station to decode the broadcast service, to receive paging messages while receiving the broadcast service, to properly transition between operation states, and other functions known to one of ordinary skill in the art.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: March 30, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Ragulan Sinnarajah, Jun Wang, Paul E. Bender, Tao Chen, Edward G. Tiedemann, Jr.
  • Patent number: 7623880
    Abstract: Method and apparatus for enhanced selection of a channel for use in redistributing mobile stations to various frequencies in a communication system. In one aspect, the method appends a redistribution alteration record to a common channel redistribution message. The redistribution alteration record alters the sequencing of the mobile station when selecting a channel in the common channel redistribution message.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: November 24, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Ragulan Sinnarajah, Jun Wang
  • Patent number: 7603126
    Abstract: A method and apparatus for avoiding simultaneous service origination and paging in a mobile operating in a group communication network provides for receiving a floor-control request, e.g., in short data burst (SDB) form, from a source communication device for initiating a group call, initiating a service origination process for the source communication device, and transmitting a response to the floor-control request from a controller after the service origination process is complete. In one aspect, the method and apparatus provides for transmitting a response to the floor-control request from a wireless infrastructure after the service origination process is complete. In another aspect, the method and apparatus provides for initiating the service origination process for the source communication device after transmitting the response to the source communication device.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: October 13, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Eric Rosen, Ragulan Sinnarajah
  • Publication number: 20090238106
    Abstract: Embodiments describe overlaying a broadcast multicast channel on top of a unicast network. Messages can be generated by protocols in a broadcast/multicast (BCMC) stack and tunneled through an IRTP of a serving access node. These messages can be transmitted on a BCMC channel and/or a unicast channel. Other messages can be generated by protocols in a unicast stack and tunneled to a B-IRTP of a BCMC Access node and transmitted on a BCMC channel to an access terminal.
    Type: Application
    Filed: March 22, 2008
    Publication date: September 24, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Fatih Ulupinar, Parag A. Agashe, Ragulan Sinnarajah
  • Publication number: 20090181675
    Abstract: A method for managing a point-to-point call initiated (702) between a wireless mobile station (114, 400) and a remote party while the mobile is receiving broadcast content via one or more multi-user forward-link broadcast channels (508). The mobile station notifies (704) the network (110) of preferences as to prescribed categories of operating conditions, such as whether to continue receiving the broadcast content, and election between the point-to-point call and the broadcast content should network resources be unable to conduct the point-to-point call and broadcast content concurrently. In accordance with the preferences, communications are conducted (706) in one of the following operating modes: (1) conducting the point-to-point call and discontinuing reception of the broadcast, (2) conducting the point-to-point call and continuing reception of the broadcast, (3) aborting completion of the point-to-point call and continuing reception of the broadcast.
    Type: Application
    Filed: December 9, 2008
    Publication date: July 16, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Ragulan Sinnarajah, Jun Wang, Tao Chen
  • Publication number: 20090161634
    Abstract: During initiation procedure between subscriber stations and access network adhering to CDMA standards, (e.g., IS-95 and IS-2000) the subscriber station receives a Sync Channel Message. Due to a design/manufacturing error, certain subscriber stations adhering to the IS-95 fail to ignore a portion of the Sync Channel Message, intended for a proper operation of subscriber stations adhering to the IS-2000. This causes a failure of the IS-95 subscriber stations' operation. The disclosed invention describes embodiments allowing the faulty subscriber stations to operate on an access networks build in accordance with both IS-95 and IS-2000 standards.
    Type: Application
    Filed: January 30, 2009
    Publication date: June 25, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Edward G. Tiedemann, JR., Jun Wang, Ragulan Sinnarajah
  • Publication number: 20090156197
    Abstract: Techniques for synchronization of stored service parameters are disclosed. In one aspect, a configuration identifier is transmitted from a mobile station to a base station, and compared with an identifier generated in the base station. If the identifiers match, the configuration is used for communication. In another aspect, the identifier is generated by selecting an identifier associated with a configuration from a configuration table. In yet another aspect, the identifier is generated by computing a cyclic redundancy check (CRC) of the configuration. Various other aspects are also presented. These aspects have the benefit of preventing attempted use of unsynchronized stored service parameters and associated call setup failures and subsequent renegotiation, with the net effect of reducing call setup time and more efficient use of system resources.
    Type: Application
    Filed: February 23, 2009
    Publication date: June 18, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Sai Yiu Duncan Ho, Edward G. Tiedemann, JR., Jun Wang, Ragulan Sinnarajah, Ramin Razaiifar
  • Patent number: 7505437
    Abstract: During initiation procedure between subscriber stations and access network adhering to CDMA standards, (e.g., IS-95 and IS-2000) the subscriber station receives a Sync Channel Message. Due to a design/manufacturing error, certain subscriber stations adhering to the IS-95 fail to ignore a portion of the Sync Channel Message, intended for a proper operation of subscriber stations adhering to the IS-2000. This causes a failure of the IS-95 subscriber stations' operation. The disclosed invention describes embodiments allowing the faulty subscriber stations to operate on an access networks build in accordance with both IS-95 and IS-2000 standards.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: March 17, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Edward G. Tiedemann, Jr., Jun Wang, Ragulan Sinnarajah
  • Patent number: 7499698
    Abstract: Techniques for synchronization of stored service parameters are disclosed. In one aspect, a configuration identifier is transmitted from a mobile station to a base station, and compared with an identifier generated in the base station. If the identifiers match, the configuration is used for communication. In another aspect, the identifier is generated by selecting an identifier associated with a configuration from a configuration table. In yet another aspect, the identifier is generated by computing a cyclic redundancy check (CRC) of the configuration. Various other aspects are also presented. These aspects have the benefit of preventing attempted use of unsynchronized stored service parameters and associated call setup failures and subsequent renegotiation, with the net effect of reducing call setup time and more efficient use of system resources.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: March 3, 2009
    Assignee: Qualcomm Incorporated
    Inventors: Sai Yiu Duncan Ho, Edward G. Tiedemann, Jr., Jun Wang, Ragulan Sinnarajah, Ramin Rezaiifar
  • Patent number: 7480270
    Abstract: A method and apparatus provide for scheduling reverse link transmission for a mobile station in a timely manner. A base station (101) may transmit on a forward link high rate channel and a forward link low rate channel to a mobile station during a common time slot. The high rate and low rate channels may be respectively the F-PDCH and the F-PDCCH. The base station may transmit a reverse link transmission scheduling information on the low rate channel. The mobile station may schedule transmission on the reverse link channel, such as R-SCH, based on the data received on the low rate channel. Since the low rate channel has only scheduling data (16 bits) and the high rate channel may have no data (null data) at all, the base station may decide to transmit the reverse link scheduling information to the mobile station very quickly on the forward link.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: January 20, 2009
    Assignee: QUALCOMM, Incorporated
    Inventors: Baaziz Achour, Ragulan Sinnarajah, Sai Yiu Duncan Ho
  • Patent number: 7477916
    Abstract: A method for managing a point-to-point call initiated (702) between a wireless mobile station (114, 400) and a remote party while the mobile is receiving broadcast content via one or more multi-user forward-link broadcast channels (508). The mobile station notifies (704) the network (110) of preferences as to prescribed categories of operating conditions, such as whether to continue receiving the broadcast content, and election between the point-to-point call and the broadcast content should network resources be able to conduct the point-to-point call and broadcast content concurrently. In accordance with the preferences, communications are conducted (706) in one of the following operating modes: (1) conducting the point-to-point call and discontinuing reception of the broadcast, (2) conducting the point-to-point call and continuing reception of the broadcast, (3) aborting completion of the point-to-point call and continuing reception of the broadcast.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: January 13, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Ragulan Sinnarajah, Jun Wang, Tao Chen