Patents Represented by Attorney Philip R. Wadsworth
  • Patent number: 7733948
    Abstract: A method and apparatus for negotiating service configuration in a digital communication system is disclosed. In an exemplary embodiment the service negotiation system is implemented in a wireless spread spectrum communication system. The service configuration comprises data rates, frame formats and types of services. Types of service may include speech encoding, facsimile or digital data services. Further described herein is a digital transmitter and receiver using the service negotiation system to provide service configuration mutually acceptable at both ends of a communication link.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: June 8, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Robert D. Blakeney, II, Edward G. Tiedemann, Jr.
  • Patent number: 7336952
    Abstract: A method and system for a handoff in a broadcast communication system is disclosed. A subscriber-assisted handoff is impractical in a broadcast communication system due to e.g., a high signaling load, a difficulty to synchronize the broadcast transmission. On the other hand, the small number of broadcast channels enables the subscriber station to perform the handoff autonomously. While performing a handoff between broadcast transmissions, a disruption of service occurs due to lack of synchronization among the broadcast transmissions. To reduce the service disruption, upon detecting a need for handoff, the lower layers inform the application layer about the forthcoming handoff. The application layer thus may take measures to reduce or prevent the disruption.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: February 26, 2008
    Assignee: QUALCOMM, Incorporated
    Inventor: Nikolai K. N. Leung
  • Patent number: 7286846
    Abstract: Systems and methods for controlling the power level for a mobile station during periods when no data is being transmitted by the mobile station. In one embodiment, data is intermittently transmitted from a mobile station to a base station on a reverse-link traffic channel. When data is being transmitted on the traffic channel, the transmitted data is used by the base station to perform power control operations (e.g., incrementing or decrementing the mobile station's power level, based upon comparison of a received SNR to a target SNR). When no data is being transmitted on the traffic channel, a “zero-rate indicator” is transmitted on the rate indicator channel. The zero-rate indicator is used by the base station to perform power control. Power control based on the zero-rate indicator may use velocity profiles, reliability metrics or other techniques to control adjustment of the power level.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: October 23, 2007
    Assignee: QUALCOMM, Incorporated
    Inventors: Tao Chen, Stein Lundby, Sandip Sarkar, Yu-Cheun Jou
  • Patent number: 7271465
    Abstract: Techniques for “strapping” a primary conductor with a secondary conductor in an integrated circuit (IC). The IC includes a number of circuit elements interconnected by a secondary conductor through a number of vias disposed at a number of locations for coupling the circuit elements as an alternative to a primary conductor. The primary conductor is typically formed with a low loss metal (e.g., copper or copper alloy), and the secondary conductor is typically formed with a lossy metal (e.g., aluminum or aluminum alloy) relative to the low loss metal. The secondary conductor is strapped to the primary conductor by the vias, which may be disposed only at both ends or along the entire length of the secondary conductor. The secondary conductor is formed using design guidelines such that it provides the required electrical connectivity when the primary conductor is not present but minimally interferes with the RF performance of the primary conductor.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: September 18, 2007
    Assignee: Qualcomm Inc.
    Inventors: Darryl Jessie, Charles J. Persico
  • Patent number: 7209712
    Abstract: Methods and apparatus for improving the feedback of channel information to a serving base station, which provides accuracy and reliability of such information. The process determines the received link quality indicators using historical information of the previously received indicators. The method may be applied to full link quality indicators, differential indicators, and/or a combination of both.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: April 24, 2007
    Assignee: QUALCOMM, Incorporated
    Inventor: Jack M. Holtzman
  • Patent number: 7206298
    Abstract: Methods and apparatus are presented for scheduling asynchronous neighboring cells within a wireless communication system. The Neighbor Set is apportioned into a Synchronated Neighbor Set and an Asynchronous Neighbor Set. Rather than performing a full frame timing acquisition search upon the Neighbor Set, only portions of the full frame timing acquisition search are selectively applied to the Asynchronous Neighbor Set. In addition, a synchronous search is performed on the Synchronated Neighbor Set.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: April 17, 2007
    Assignee: Qualcomm, Incorporated
    Inventor: Wen Jing New
  • Patent number: 7203319
    Abstract: An apparatus for installing a decryption key is initially arranged so that a decryption algorithm received by a control processor is passed via a first interface path to a decryption processor. The algorithm is installed in the decryption processor together with a program decryption key. The apparatus is subsequently arranged so that encrypted working decryption keys received by the control processor are passed on to the decryption processor over the first interface path. The decryption processor decrypts the encrypted keys using the program decryption key. Decryption keys are thus obtained and are transferred via a second interface path to decryptors for use in decrypting encrypted program signals input to the decryptors.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: April 10, 2007
    Assignee: Qualcomm, Inc.
    Inventors: Liat Ben-Zur, Curtis D. Mursfeldt, Christopher Wingert, Paul Pomes, Jesse Hose, Ann C. Irvine, Senthil Govindaswamy
  • Patent number: 7200162
    Abstract: In general, the invention facilitates searching for energy peaks in spread spectrum wireless communication systems with greater precision. More particularly, various embodiments of the invention may involve reporting not only an energy peak and its associated offset, but also the energy levels corresponding to one or more offsets occurring before and after the offset at which the energy peak occurs. Interpolation or extrapolation techniques may be used to predict the actual location of an energy peak based on the apparent location of the peak and the energy levels observed at surrounding offsets.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: April 3, 2007
    Assignee: Qualcomm, Incorporated
    Inventors: Inyup Kang, Mark Roh, Brendon L. Johnson
  • Patent number: 7190687
    Abstract: A method and apparatus for requesting PPP instances from a packet data services network includes a mobile station configured to send an origination message to a packet data service node (PDSN) at which it has arrived upon leaving the vicinity of another PDSN. The message informs the new PDSN of the new location of the mobile station and indicates both the number of dormant PPP instances associated with the mobile station and a service reference identifier for each such PPP instance. A flag within the message may be used to indicate whether the PPP instances are dormant (i.e., whether the mobile station is engaged in a call).
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: March 13, 2007
    Assignee: Qualcomm Incorporated
    Inventors: Raymond Tah-Sheng Hsu, Ramin Rezaiifar
  • Patent number: 7190750
    Abstract: Techniques for tracking closely spaced multipath and preventing finger merge without monitoring relative positions between each of a plurality of fingers are disclosed. In one aspect, motion limits are determined for each finger. Time-tracking commands that would move the position of a finger outside its respective motion limits are suppressed. In another aspect, motion limits are updated dynamically, the motion limits of each finger determined in accordance with the motion limits of fingers adjacent to it. Various other aspects are also presented. These aspects have the benefit of preventing finger merge, which allows the allocation of multiple fingers to closely spaced multipath, thus increasing performance and system capacity, and mitigating misallocation of system resources.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: March 13, 2007
    Assignee: Qualcomm Incorporated
    Inventors: Edward Harrison Teague, Messay Amerga, Jeremy Lin, Da-shan Shiu
  • Patent number: 7187708
    Abstract: A buffer structure for storing symbols received via a number of (e.g., physical or transport) channels. Each channel is associated with a particular time interval (e.g., a radio frame period or a transmission time interval (TTI)) over which the received symbols are processed (e.g., interleaved). The buffer structure includes a buffer and an address generator. The buffer is partitioned into a number of sections. One section is assigned to each channel being processed. Each section can be operated as a circular buffer. The address generator provides addresses for writing symbols to the assigned sections. If the buffer structure is used for the transport channels, the sections can be assigned to the transport channels based on the associated TTIs (e.g., in descending order of TTIs). For each coded composite transport channel (CCTrCH), the transport channels in the CCTrCH can be assigned to sections defined starting from a respective initial location (e.g.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: March 6, 2007
    Assignee: Qualcomm Inc.
    Inventors: Da-Shan Shiu, Avneesh Agrawal
  • Patent number: 7184743
    Abstract: Techniques to schedule uplink data transmission for a number of terminals in a wireless communication system. In one method, a number of sets of terminals are formed for possible data transmission, with each set including a unique combination of terminals and corresponds to a hypothesis to be evaluated. The performance of each hypothesis is evaluated (e.g., based on channel response estimates for each terminal) and one of the evaluated hypotheses is selected based on the performance. The terminals in the selected hypothesis are scheduled for data transmission. A successive cancellation receiver processing scheme may be used to process the signals transmitted by the scheduled terminals. In this case, one or more orderings of the terminals in each set may be formed, with each terminal ordering corresponding to a sub-hypothesis to be evaluated. The performance of each sub-hypothesis is then evaluated and one of the sub-hypotheses is selected.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: February 27, 2007
    Assignee: Qualcomm, Incorporated
    Inventors: Jay Rod Walton, Mark S. Wallace, Steven J. Howard
  • Patent number: 7184789
    Abstract: Method and apparatus for data packet transport in a wireless transmission system supporting broadcast transmissions. A trigger recognized at the transmission node initiates a broadcast transmission, and the resultant set up of a transmission path. A termination trigger then indicates that the transmission node is not serving users desiring the broadcast transmission, and in response the transmission path is shut down. In one embodiment, a multi-cast call, such as a group call, may be transmitted to active users via uni-cast channel(s) or multi-cast channel(s) based on a predetermined criteria, such as number of active users.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: February 27, 2007
    Assignee: Qualcomm, Incorporated
    Inventors: Nikolai K. N. Leung, Nileshkumar J. Parekh, Raymond T. Hsu, An Mei Chen
  • Patent number: 7181244
    Abstract: A novel mobile unit which communicates with a new and advantageous base station. The mobile unit includes a system for generation of position information and a transceiver for transmitting the position information. In the preferred embodiment, the transceiver is a CDMA system and the system for generating position information includes an arrangement for receiving a GPS signal. In the preferred embodiment, a GPS assisted arrangement is employed which is adapted to receive a signal from an airborne platform as well as from a satellite based platform. The inventive base station is adapted to receive position information from a remote unit and provide a received position signal in response thereto. The novel base station is further equipped with a mechanism for directing a beam in response to the received position signal.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: February 20, 2007
    Assignee: Qualcomm, Incorporated
    Inventors: Bruce A. Judson, Christopher C. Riddle
  • Patent number: 7180879
    Abstract: Techniques for minimizing call setup latency are disclosed. In one aspect, a channel assignment message is sent with a flag to direct the use of previously negotiated service parameters. This aspect eliminates the need for service negotiation messages. In another aspect, a channel assignment message is sent with an active set identifier instead of an active set and its parameters. This aspect reduces the transmission time of the channel assignment message. In yet another aspect, call setup without paging is facilitated by a mobile station (106) sending a pilot strength measurement message between active communication sessions, such that a channel assignment message can be used for mobile station terminated call setup without the need for mobile station paging and related messages.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: February 20, 2007
    Inventors: Ragulan Sinnarajah, Edward G. Tiedemann, Jr., Ramin Rezaiifar, Jun Wang, Duncan Ho
  • Patent number: 7177351
    Abstract: Techniques to determine data rates for a number of data streams transmitted via a number of transmission channels (or transmit antennas) in a multi-channel (e.g., MIMO) communication system. In one method, the “required” SNR for each data rate to be used is initially determined, with at least two data rates being unequal. The “effective” SNR for each data stream is also determined based on the received SNR and successive interference cancellation processing at the receiver to recover the data streams. The required SNR for each data stream is then compared against its effective SNR. The data rates are deemed to be supported if the required SNR for each data stream is less than or equal to its effective SNR. A number of sets of data rates may be evaluated, and the rate set associated with the minimum received SNR may be selected for use for the data streams.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: February 13, 2007
    Assignee: Qualcomm, Incorporated
    Inventor: Tamer Kadous
  • Patent number: 7177658
    Abstract: Techniques to implement MBMS services in a wireless communication system. In one aspect, a method is provided for processing data for transmission to a plurality of terminals. Frames of information bits (which may have variable rates) are provided to a buffer implementing a matrix. The matrix is padded with padding bits based on a particular padding scheme to support variable frame rates. The frames are then coded based on a particular block code to provide parity bits. The frame of information bits and the parity bits are then transmitted to the terminals. In another aspect, a method is provided for controlling the transmit power of a data transmission to a plurality of terminals. In accordance with the method, TPC streams are received from the terminals and processed to obtain a stream of joint power control commands used to adjust the transmit power of the data transmission.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: February 13, 2007
    Assignee: Qualcomm, Incorporated
    Inventors: Serge Willenegger, Tao Chen, Alkinoos Hector Vayanos, Yongbin Wei
  • Patent number: 7174190
    Abstract: A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: February 6, 2007
    Assignee: Qualcomm Inc.
    Inventors: Brett C. Walker, Paul E. Peterzell, Tao Li, Matthew L. Severson
  • Patent number: 7173631
    Abstract: A three-dimensional (3D) graphics pipeline renders a sequence of images of 3D scenes each composed of a plural set of objects. The pipeline comprises an antialiasing oversampling mechanism to perform for a given image, at an early stage of the pipeline, oversampling on a portion of the objects of the given image.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: February 6, 2007
    Assignee: Qualcomm Incorporated
    Inventor: Michael Hugh Anderson
  • Patent number: 7174403
    Abstract: An arbiter in a bus system arbitrates multiple bus transaction requests in a single bus frequency clock cycle, by operating at a frequency greater than the bus frequency. This allows for two or more arbitration operations in a single bus frequency clock cycle with one instance of arbitration logic. The arbiter may arbitrate for two or more slave devices, or may arbitrate multiple master device requests directed to the same slave device. The arbiter frequency may be variable, and may be predicted based on, e.g., prior bus activity. If only one bus transaction request is pending, the arbiter frequency may equal the bus frequency. The results of an earlier arbitration decision may be utilized to more intelligently make subsequent arbitration decisions in the same bus frequency clock cycle.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: February 6, 2007
    Assignee: Qualcomm Incorporated
    Inventor: Jaya Prakash Subramaniam Ganasan