Patents Examined by Thuan T. Nguyen
  • Patent number: 6625439
    Abstract: A method facilitates provisioning of pre paid wireless services. Credit refresh operations involving a pre paid wireless communication device involve SMS messages transmitted to the device over the air. The device uses tariff tables to keep track of a call's impact on available credit. The tariff tables are updatable at the service provider's discretion using SMS messages.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: September 23, 2003
    Assignee: Telemac Corporation
    Inventors: Bernard T. Laybourn, Theodore W. Watler
  • Patent number: 6625453
    Abstract: A method of reducing, or even eliminating, the tariffs, surcharges and long-distance charges that might be incurred for calls involving wireless switching centers in multiple regions (or countries) is disclosed. This is accomplished in the illustrative embodiment by trunking calls directly from the calling wireless switching center to the visiting wireless switching center, where advantageous, without trunking the call across a regional or political boundary as is done in the prior art.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: September 23, 2003
    Assignee: Lucent Technologies Inc.
    Inventors: Weiqian Dai, Tony Tuong Nguyen
  • Patent number: 6618588
    Abstract: Methods and systems for providing for calling party name and/or other information corresponding to a wireless unit to be stored in association with the mobile identity number (MIN) and/or mobile directory number (MDN) of the wireless unit in a location register such as the home location register (HLR) in a network element of a wireless network. The network element is configured to accept and support the TR-1188, wireless intelligent network (WIN), or the like messaging processes. When a calling party uses a wireless unit to make a call to a wireline unit of a subscriber having calling name delivery service, the call is routed in a conventional manner to the service switching point (SSP) serving the calling line of the wireline unit.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: September 9, 2003
    Assignee: BellSouth Intellectual Property Corporation
    Inventor: Larry Scott Easley
  • Patent number: 6608998
    Abstract: A calibration procedure for reducing frequency-dependent bias effects in a fixed satellite-based ground-positioning receiver is disclosed, the receiver having the capability to receive both GPS and GLONASS satellite signals. The calibration procedure removes satellite dynamics by utilizing the respective satellite ephemeris data, estimates the change in receiver clock offset by means of GPS measurements, and acquires a set of two or more GLONASS pseudorange measurements while cycling a local oscillator in the receiver through a predetermined sequence of different frequencies.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: August 19, 2003
    Assignee: NovAtel, Inc.
    Inventors: Janet Brown Neumann, Marcia Bates, Robert S. Harvey
  • Patent number: 6603964
    Abstract: A mixer circuit (100) includes two balanced transmission gate mixers (102, 104). The mixer circuit (100) balances charge injection mechanisms which reduces carrier feedthrough in the preferred embodiment. The inputs signals provided to the second transmission gate mixer (104) are reversed as compared to those provided to the first transmission gate mixer (102). By reversing the forward path through the second transmission gate mixer (104), charge injection parasitics seen by the first transmission gate mixer (102) are canceled by those in the second transmission gate mixer (104).
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: August 5, 2003
    Assignee: Motorola, Inc.
    Inventors: Matthew D. Rowley, David E. Bockelman
  • Patent number: 6600896
    Abstract: An exciter system (1, 2) able to communicate information between an exciter unit (10) and one or more remote units (12) or between multiple exciter units (10). The exciter units (10) may include wireless type exciter devices, such as optimum exciters (14), or they may include wired equivalent type exciter devices, such as direct connect exciters (16). The exciter devices (14, 16) inject or extract RF currents (24) in the metallic framework (22) of a vehicle. The remote units (12) couple electromagnetic fields (26) with the metallic framework (22) of the vehicle. The information is exchanged with the exciter devices (14, 16) by communications equipment (20) that modulates or demodulates the RF currents (24) and/or electromagnetic fields (26) with the information. As the RF currents (24) and/or electromagnetic fields (26) reach everywhere within, on and in close proximity to the vehicle the information is communicated throughout.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: July 29, 2003
    Assignee: Cocomo MB Communications, Inc.
    Inventors: George G. Chadwick, Robert W. Haight, Edward Collins, IV
  • Patent number: 6594487
    Abstract: A reception device is disclosed for a radio communication system for the reception of subscriber signals via a radio interface. The reception device contains a means for determining number of active subscribers from the a total number of subscribers that are assigned to the radio interface, and contains a further detection device for detecting at least one subscriber signal. As a result of the determination of the subscribers actually active from the subscriber signals, a detection is simplified particularly when the subscriber signals are separated by a fine structure.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: July 15, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Markus Nasshan, Anja Klein
  • Patent number: 6594508
    Abstract: A method and apparatus for providing an antenna condition signal and a feeder cable condition signal in a base station having an antenna coupled to a cabinet by an antenna feeder cable. Two directional couplers are configured to detect forward and reflected signals to and from the antenna. Power detectors are coupled to the RF couplers, and are configured to provide forward and reflected power signals. A first differential amplifier provides a detector tuning signal proportional to the difference between the forward and reflected power signals. A second differential amplifier provides a detector tuning signal proportional to the difference between the forward and a reference voltage. Each differential amplifier tunes a voltage controlled oscillator (VCO). The output of the VCOs is coupled to the feeder cable. A phase locked loop at the cabinet is coupled to the feeder cable and provides a recovery tuning signal which tracks the tuning signals to the differential amplifiers.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: July 15, 2003
    Assignee: Nokia Corporation
    Inventor: Veli-Pekka Ketonen
  • Patent number: 6591089
    Abstract: The mobile station has a variable gain amplifier and adjusts a gain of the variable gain amplifier in accordance with a level data signal so as to transmit an output transmission signal for each of slots with transmission power control. The mobile station further has a compensation system for the transmission power control with respect to variance of environment surrounding to the mobile station and so on. The compensation system partially extracts the output transmission signal over each slot and carries out a logarithmic wave detection of the extracted transmission signal to produce a resultant signal of the wave detection. Then the compensation system calculates for each slot an average error of the resultant signal of the level data signal and corrects the level data signal with reference to the average error to produce a corrected level data signal as a newly level data signal.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: July 8, 2003
    Assignee: NEC Corporation
    Inventor: Masaki Ichihara
  • Patent number: 6580900
    Abstract: A tuning arrangement tunes a resonance module for wireless applications, e.g., wireless communication for a base station for mobile telephony system. The input and the output power signals of the resonance module are derived and information bearing parts of the derived power signals are divided with each other to produce a ratio. The resonance module is tuned until the ratio reaches a minimum value.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: June 17, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Lars Edström
  • Patent number: 6580929
    Abstract: A mobile phone charger also functioning as a remote sound monitoring device is provided. The charger internally includes a high-sensitive microphone, a DTMF decoder, and a central processing unit (CPU). When a handset of a mobile phone is disposed in a handset w/battery charging socket on the charger, an in-car hand-free enabling circuit in the charger is enabled for the handset in the charger to charge while entering into a hand-freemode. At this point, the charger substitutes for the handset and the CPU in the charger automatically receives signals of in-coming call over the mobile phone and the mobile phone does not ring. On receipt of a signal of an in-coming call, the CPU prompts the caller to enter a code that is decoded and compared by the DTMF decoder with a code preset in the CPU.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: June 17, 2003
    Assignee: Mitake Information Corporation
    Inventor: Hung-Che Chiu
  • Patent number: 6580920
    Abstract: A method for use by a mobile station in a cellular telephone network in determining a setting for gain control for a first idle period in a succession of idle periods of the serving base station, the method including: determining whether at the location of the mobile phone, the load attributable to any one of the neighboring or active set base stations differs substantially from the load attributable to at least one other of the neighboring or active set base stations, the determining being based only on information already available to the mobile station; and determining the gain control setting based on a calculation of the relative power decrease made according to a prescription that depends on whether the load attributable to any one of the neighboring or active set base stations differs from the load attributable to at least one other of the neighboring or active set base stations.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: June 17, 2003
    Assignee: Nokia Mobile Phones Ltd.
    Inventor: Kari Kalliojärvi
  • Patent number: 6574483
    Abstract: A method and communication system for assigning the plurality of fingers to demodulation paths in a path list which insures that at least one finger will be assigned to a demodulation path supporting a supplemental channel, if one exists. The method involves determining whether any of the fingers is demodulating a supplemental channel (112). When no fingers are demodulating supplemental channels, the it is determined whether the sector containing the path under consideration supports supplemental channels (114). If the sector containing the path under consideration supports supplemental channels, then the method determines the strength of the signal path relative to the weakest finger (116).
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: June 3, 2003
    Assignee: Qualcomm, Incorporated
    Inventor: Messay Amerga
  • Patent number: 6571081
    Abstract: An apparatus for reducing the amount of circuitry required to process satellite communication signals uses a beamformer to reduce the number of signals coupled to the communications circuitry, thereby reducing the amount of communication circuitry required to process received signals.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: May 27, 2003
    Assignee: Hughes Electronics Corporation
    Inventor: Victor S. Reinhardt
  • Patent number: 6564051
    Abstract: There is disclosed an apparatus for interconnecting a plurality of communications mediums, including voice frequency and broadband frequency to a subscriber communications system at the subscriber's premises. The apparatus comprises: 1) a controller for coupling and de-coupling communications mediums comprising at least one public service telephone network (PSTN) line and at least one non-public service telephone network (non-PSTN) line, to a communication system within the subscriber's premises; 2) lightning protection for controller interfaces; 3) a detector circuit for detecting power loss in the non-public service telephone network connection and 4) fail-over (re-connecting to an alternate circuit) devices connected to a public service telephone network line; and 5) a test circuit for monitoring the condition of a backup power supply for the apparatus.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: May 13, 2003
    Assignee: Raze Technoliges, Inc.
    Inventors: Paul F. Struhsaker, Rex N. Frodge, Barry W. Barge
  • Patent number: 6564041
    Abstract: An improved squelch system (10) is provided in accordance with the present invention. The system includes a high-deviation subsystem (20) to detect a carrier with modulation, and a low-deviation subsystem (30) to detect the carrier with minimal modulation. If either the high-deviation system (20) or the low-deviation system (30) indicate a signal of sufficient strength, an output for the squelch system is set to un-mute, otherwise the output (70) is set to mute.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: May 13, 2003
    Assignee: Motorola, Inc.
    Inventor: Darrell J. Stogner
  • Patent number: 6564064
    Abstract: A cellular telephone having a global positioning system (GPS) receiver using a blended combination of GPS signals from GPS satellites and GPS pseudolites for determining a location. The cellular telephone includes a cellphone transceiver and a GPS receiver. The cellular transceiver receives wireless downlink cellphone signals from the cell site transceiver and transmits wireless uplink cellphone signals to the cell site transceiver. The cell site transceiver passes voice and data from the downlink and uplink cellphone signals within a local area into the worldwide network of telephone services. The GPS receiver receives satellite GPS signals from GPS satellites and pseudolite GPS signals from GPS pseudolites. The GPS pseudolites augment the GPS satellites for the local area by broadcasting pseudolite GPS signals having location-determination information with a format that is similar to the format in the satellite GPS signals.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: May 13, 2003
    Assignee: Trimble Navigation Limited
    Inventors: Ann Ciganer, James M. Janky
  • Patent number: 6560449
    Abstract: In a communications receiver for quadrature demodulation, a feedback technique for reducing the image response of the receiver. The communications receiver includes an I demodulator and a Q demodulator. A local oscillator (LO) signal is provided by a PLL to a quadrature LO generator that provides an LO_I signal to an I demodulator and an LO_Q signal to a Q demodulator. The LO_I and LO_Q signals are amplitude and phase-controlled versions of the LO signal. An image/signal ratio (I/S) detector detects the relative phase difference and the relative amplitude difference between the respective output terminals of the I demodulator and the Q demodulator and applies an amplitude control signal and a phase control signal to corresponding amplitude control and phase control inputs of the quadrature LO generator. The I/S detector calibrates the quadrature LO generator during the interstitial interval between the reception of data packets.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: May 6, 2003
    Assignee: Broadcom Corporation
    Inventor: Bin Liu
  • Patent number: 6556825
    Abstract: A method of configuring an RF transceiver to receive a geographic-region specific message within a RF signal from a communications network, includes detecting the geographic-region specific message in a first RF transceiver operating in a first RF frequency spectrum; associating the detected geographic-region specific RF signal with a geographic region; generating a configuration command signal for the geographic region; and configuring a second RF transceiver to receive and transmit RF signals in a second RF frequency spectrum particular to the geographic region from the configuration command signal.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: April 29, 2003
    Assignee: Sharp Laboratories of America, Inc.
    Inventor: Carl Mansfield
  • Patent number: 6553217
    Abstract: One or more preferred call numbers are defined and managed for mobile subscribers. A destination number dialed with the call is compared to the preferred call numbers for the mobile subscriber. When the destination call number is identical to a preferred call number, the call charges are determined by a charging device in the mobile network in a different manner than the usual charge. The storing of the preferred call numbers can occur at the mobile station side in a mobile station or at the network side. Based on the subscriber-specific stipulation of preferred call numbers, mobile subscribers have the ability to select and define specific call destinations which are charged differently than other calls, for instance according to a more favorable fee schedule. This increases the flexibility of the mobile subscribers and network operators with respect to the scheduling of calling rates.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: April 22, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventor: Andreas Kundorf