Including Distributed Parameter Structure Patents (Class 455/111)
  • Patent number: 9386536
    Abstract: Methods and apparatus are disclosed for improving radio transmissions between a mobile device located inside an enclosed structure and an outside radio network. A relay or repeater is used to relay transmissions back and forth between the inside mobile device and the outside radio network. The transmission power of the relay/repeater used to transmit signals to the mobile device and that of the mobile device used to communicate with the relay/repeater can be dynamically adjusted in accordance with the penetration loss of the enclosed structure.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 5, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Michael Meyer, Joachim Sachs
  • Patent number: 8918064
    Abstract: A transmitter front-end for wireless chip-to-chip communication, and potentially for other, longer range (e.g., several meters or several tens of meters) device-to-device communication, is disclosed. The transmitter front-end includes a distributed power amplifier capable of providing an output signal with sufficient power for wireless transmission by an on-chip or on-package antenna to another nearby IC chip or device located several meters or several tens of meters away. The distributed power amplifier can be fully integrated (i.e., without using external components, such as bond wire inductors) on a monolithic silicon substrate using, for example, a complementary metal oxide semiconductor (CMOS) process.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: December 23, 2014
    Assignee: Broadcom Corporation
    Inventors: Farid Shirinfar, Med Nariman, Maryam Rofougaran, Ahmadreza Rofougaran
  • Patent number: 8798557
    Abstract: A forming method using a pressing and injection-molding multifunction die for forming a metal-resin molded product by integrating metal with resin, includes: forming a resin-molded portion on the metal; and performing, after the resin-molded portion is formed on the metal, at least one of a pressing process and an injection-molding process on the metal in the state in which the metal-resin molded product is supported by only the resin.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: August 5, 2014
    Assignee: Kyosan Denki Co., Ltd.
    Inventors: Nobuyuki Yamagami, Syuji Ichihashi, Hiroaki Sakurai, Mitsuru Mori
  • Patent number: 8693577
    Abstract: A receiver operatively coupled to an antenna structure capable of receiving a first plurality of RF signals is disclosed herein. The receiver includes an RF processing network operative to perform weighting and combining operations within the RF domain using the first plurality of RF signals so as to produce a second plurality of RF signals. Also provided is a downconverter configured to downconvert the second plurality of RF signals into a second plurality of down-converted signals. In alternate implementations certain of the weighting and combining operations are performed at baseband and the remainder effected within the RF domain. A transmitter of corresponding architecture is also disclosed.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: April 8, 2014
    Assignee: Broadcom Corporation
    Inventors: Severine Catreux, Vinko Erceg, Pieter Roux, Pieter Van Rooyen, Jack Winters
  • Patent number: 8626056
    Abstract: Transmitting devices facilitate privacy protection of content broadcasted from the transmitting device to a receiving device without the need to modify the receiving device. A transmitting device may be adapted to acquire content, such as audio and/or video data, to be broadcasted by the transmitter for reception and use by a receiving device. A transmission range is selected to define a distance for broadcasting the content from the transmission device for reception and use by a receiving device. A frequency is also selected to be used for broadcasting the content. With the transmission range and frequency selected, the transmitting device may broadcast the content according to the selected transmission range and frequency.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: January 7, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Yong Jin Kim, Stephen J. Shellhammer, Vijayalakshmi R. Raveendran, Wenyi Zhang, Ahmed K. Sadek, Yu A. Wang
  • Patent number: 8423762
    Abstract: What is disclosed is a system and method that allows a secondary certificate authority to rely on one or more existing primary certificate authorities to establish identity of a user and provide identity certificates. The secondary certificate authority applies business rules to those identity certificates to establish a community of privilege, and then issues and maintains new privilege certificates without issuing new private keys or smart cards. The new privilege certificates bind the original identity, the sponsor, i.e., the primary certificate authority, and the privilege. The new privilege certificates can be used on a Public Key Infrastructures (PKI) transaction basis, for example, to grant access to unclassified and Multi-Level Secure (MLS) resources without further reference to the existing primary certificate authorities.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: April 16, 2013
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Kenneth W. Aull, Erik J. Bowman, James B. Rekas
  • Patent number: 8271011
    Abstract: A method for a response device in an audience response system having a plurality of response devices to wirelessly communicate bulk data includes transmitting a signal and receiving data indicating to the response device to transmit data requests. The method further includes transmitting data request signals, and receiving at least data describing the bulk data in response to a first data request signal and at least a portion of the bulk data in response to a second data request signal.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: September 18, 2012
    Assignee: Turning Technologies, LLC
    Inventor: Jonathan A Hallsten
  • Patent number: 8196193
    Abstract: A device, method, and system disclosed herein may be used to integrate and control authentication and passwords among various applications and platforms. The exemplary method may obtain a service ticket from a key distribution center of the key distribution center authentication process and generate a random key. A port between the client and the service may be created and utilized to transmit the service ticket and the random key to a service from the client. The random key may replace a password provided by the user. The random key in the password field of the service logon is transmitted to the service. The service authenticates the random key in the password field with the stored random key in the cache of the service. Once authenticated the service ticket is validated.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: June 5, 2012
    Assignee: PistolStar, Inc.
    Inventors: Thomas J. Hoey, Gregg Browinski
  • Patent number: 7877065
    Abstract: A signal processing circuit having a modulator having frequency conversion circuits, each having a local oscillator and a mixer. The circuit multiplies a signal having a first frequency and a local oscillation signal from the local oscillator at the mixer to convert the frequency of the first frequency signal to a second frequency, outputs a current format frequency converted signal and a first gain control circuit amplifying the current format frequency converted signals from the frequency conversion circuits by a first gain in accordance with a first control voltage. The circuit also outputs the current format amplified signals and a second gain control circuit connected after the first gain control circuit and having at least one gain control circuit which amplifies a current format amplified signal output from the first gain control circuit by a second gain.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: January 25, 2011
    Assignee: Sony Corporation
    Inventor: Hideo Morohashi
  • Patent number: 7818026
    Abstract: The invention relates to a terminal to be used in a system, which comprises a device management server and a data transfer network for transmitting information used in association with configuration between the terminal and the device management server. The terminal comprises means for detecting change in the terminal capabilities, and means for transmitting information on the change in the terminal capabilities to the device management server. In addition, the invention relates to a system for transmitting information used in connection with the terminal configuration between the terminal and the device management server. Further, the invention relates to a method in the configuration of the terminal, to a method for providing configuration information to the terminal, as well as to a computer software product to be used in the terminal configuration.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: October 19, 2010
    Assignee: Nokia Corporation
    Inventors: Rauno Hartikainen, Hannu Pirilä, Matti Jokimies
  • Patent number: 7707414
    Abstract: An information processing method for an information processing device which performs multiple types of authentication processing performing authentication processing before accepting at least one or more independent services and executing the aforementioned services. The information processing method includes: a receiving step for receiving service requests including the authentication information from the external terminal; a calling step for calling the authentication processing which performs authentication processing corresponding to the services requested from the external terminal, referencing first information which describes the authentication processing calling procedure corresponding to the service; an output step for receiving and outputting results of the called authentication processing; and a calling step for calling the accepted services according to the results of the authentication processing output in the output step.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: April 27, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiro Nishio
  • Publication number: 20100099368
    Abstract: An FM-band transmit power amplifier and a method of transmitting in multiple bands. In one embodiment, the FM-band transmit power amplifier has an input and an output and includes: (1) a pre-filter including a charge-pump based integrator coupled to the input and a passive notch filter having a notch frequency in a band other than an FM band and (2) an output driver coupled between the passive pre-filter and the output and having PMOS and NMOS transconductors configured to receive an output from the passive filter.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 22, 2010
    Applicant: Texas Instruments Incorporated
    Inventors: Mehmet T. Ozgun, Baher S. Haroun
  • Patent number: 7693140
    Abstract: An S/P converting section (101) converts input transmission signals A1, A2, B1, B2, . . . , K1, K2 to parallelized data, separated in individual transmission lines. Spreading sections (102, 103) spread the respective data under control of a spread control section (107). Adding sections (104-1, 104-2) multiplex spread data. Transmitting sections (105-1, 105-2) provide radio transmission processing to the multiplexed signals, and transmit the data via antennas (106-1, 106-2) by radio. The spread control section (107) controls the spreading methods in the spreading sections (102, 103) based on channel quality. This makes it possible to improve error rate characteristics of the received signal and as maintain spectrum efficiency when varying data is transmitted from multiple antennas.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: April 6, 2010
    Assignee: Panasonic Corporation
    Inventor: Hiroaki Sudo
  • Patent number: 7612670
    Abstract: A pack of portable radios (110), at least one of which includes a radio frequency identification (RF ID) reader; a deployable infrastructure, including deployable infrastructure elements (160, 170) are packaged into a unitary package (110) shipped and stored for on-site configuration without the use of local infrastructure and without prior knowledge of communication system operation. A plurality of RF ID tags (404) coupled to each portable radio (112) and the deployable infrastructure elements (160, 170) provide tracking information to the RF ID reader for transmitting to the deployable infrastructure elements. The tracking identification information can be used for both inventory tracking and location tracking of the portable radios and infrastructure elements deployed in the field.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: November 3, 2009
    Assignee: Motorola, Inc.
    Inventor: David E. Klein
  • Patent number: 7551904
    Abstract: An method and apparatus for power amplification in a mobile communication system, wherein a signal converter for receives signals from a baseband-side, modulates the received signals into oversampled baseband digital signals, and generates signals having a constant envelope with the oversampled base band digital signals, an up-converter up-converts the generated signals having the constant envelope to Radio Frequency (RF) signals for output, and a power amplifier amplifies the RF signals according to system setup levels and outputs envelope signals of a predetermined level.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: June 23, 2009
    Assignees: Samsung Electronics Co., Ltd, Postech Foundation
    Inventors: Dong-Geun Lee, Bum-Man Kim, Jeong-Hyeon Cha
  • Patent number: 7546094
    Abstract: A method (200) of dynamically deploying wireless repeaters in a communication network can include establishing (205) a first wireless repeater serving as a communication node, evaluating (210) quality of a signal dynamically among at least one additional repeater being deployed in the communication network and the communication node, and selectively entering (215) a vertical unit in one of the additional repeaters being deployed. Evaluating the quality can include measuring (211) a signal strength from other repeaters in the communication system or measuring (212) a signal strength from a nearest repeater among the other repeaters in the system. Evaluating can also include pinging (213) the communication node. The vertical units can be entered as an input using any number of input devices including, but not limited to a keypad, a rotary switch (22 and 24), a voice recognition system or any combination thereof.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: June 9, 2009
    Assignee: International Business Machines Corporation
    Inventor: Christopher C. Couper
  • Publication number: 20080297413
    Abstract: A method includes determining for each access point and each associated client that has traffic to exchange with the access point in either directions of a link a pattern of slots of times that causes minimum interference to clients of other access points in a wireless local area network; deriving a conflict graph of pair wise patterns of different access points representing which patterns conflict on a particular client, the conflict graph representing which patterns of the slots cannot be scheduled simultaneously in a slot so as to avoid interference; and generating a schedule for each access points in the slots such that no two conflicting patterns for two different access points are scheduled in the same slot.
    Type: Application
    Filed: May 29, 2008
    Publication date: December 4, 2008
    Inventors: Ravindranath Kokku, Samrat Ganguly, Vishnu Navda
  • Patent number: 7406300
    Abstract: A wireless communication system includes at least one repeater antenna assembly for providing adequate RF coverage within a building, such as a home. An example repeater antenna assembly has an automatically adjustable gain that is controlled responsive to a pathloss associated with a received signal to avoid base station transceiver desensitization and positive feedback. A disclosed assembly avoids base station desensitization and positive feedback. Another disclosed technique maintains a selected minimum link budget within the building.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: July 29, 2008
    Assignee: Lucent Technologies Inc.
    Inventor: Victor Pan
  • Patent number: 6518850
    Abstract: A method of modulating a microwave carrier and a modulating device are disclosed make it possible directly, onto a microwave carrier right at the operating frequency, to modulate an information signal from a digital bit-stream without the use of a conventional up-conversion chain or frequency multiplication after the modulation. A fast ferroelectric element is provided and operated with a variable voltage source controlled directly by the digital bit-stream representing the information to be modulated. The element can either be positioned between a microwave power amplifier and a radiating antenna device or even close in front of the antenna such that a collimated beam must pass through the modulation device. The element will then be able to introduce phase modulation of a passing microwave carrier.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: February 11, 2003
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Kent Olof Falk, Ragnar Arvidsson
  • Patent number: 6393258
    Abstract: A process for adjusting a level of spurious signal spectral lines in an output frequency spectrum provided by a single-sideband frequency mixer includes the step of generating two mutually phase-shifted test signals defined by a plurality of parameters, and applying the two test signals to respective first and second inputs of the single-sideband frequency mixer. The level of each of the spurious signal spectral lines are measured for different test values corresponding to the plurality of parameters of the two test signals. Reference values are determined for the plurality of parameters for minimizing the level of the spurious signal spectral lines. The reference values are determined by a numerical calculation performed on a predetermined number of different test values of the plurality of parameters, and corresponding measured values of the levels with respect to two parabolic relations linking the levels of the two spurious signal spectral lines with the plurality of parameters.
    Type: Grant
    Filed: October 20, 1999
    Date of Patent: May 21, 2002
    Assignee: STMicroelectronics S.A.
    Inventors: Maria Luisa Gambina, Vincent Fournier
  • Patent number: 6242990
    Abstract: A phase modulator for communication applications is constructed in so as to be easily implemented by way of MMIC technology. A phase modulator section is followed by a saturated amplifier section so as to provide substantially constant amplitude for all bits or states. The phase modulator section is a bi-phase shift keyed or quadrature-phase shift keyed modulator constructed in accordance with the present invention for discretely varying the phase of an input carrier signal between two or four possible phase states, respectively. The bi-phase shift keyed modulator includes at least a first pair of first and second transmission line segments and a pair of switches which each serve as a single-pole double-throw switch for operatively connecting one of the pair of transmission line segments between an input associated with the first switch, and an output associated with the second switch.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: June 5, 2001
    Assignee: TLC Precision Wafer Technology, Inc.
    Inventor: Vladimir Sokolov
  • Patent number: 6163677
    Abstract: A satellite communication terminal system can execute voice communication even if it is placed at a location which is obstructed from a communication satellite by any object and has no telephone line. Further, a satellite communication terminal system for general purpose use and being extendible by using a satellite communication terminal comprises a portable satellite communication terminal for performing the voice communication with any other station through a communication satellite, a connection device and a radio telephone device including a base unit and hand units. The connection device comprises a terminal interface unit interfaced with the satellite communication terminal for controlling the transmission and reception of the satellite communication terminal and a channel control unit connected to the terminal interface unit for performing the channel connection to the radio telephone device.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: December 19, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinji Natsukawa, Hiroyuki Morimoto
  • Patent number: 6161018
    Abstract: At a receiver location in a wireless communication system service area, a set of characteristics that describe a received ray of a subscriber signal is measured. In a model of the wireless communication system service area, a propagation path of a model ray launched from a location in the model of the wireless communication system service area that corresponds to the receiver location in the wireless communication system service area is determined, wherein the ray has model signal characteristics based upon the set of characteristics that describe the received ray of the subscriber signal. Thereafter, a subscriber location in the wireless communication system service area is estimated in response to the propagation path of the model ray.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: December 12, 2000
    Assignee: Motorola, Inc.
    Inventors: John Douglas Reed, Shu-Shaw (Peter) Wang
  • Patent number: 6160992
    Abstract: A method and system for a communication system with a communication center, a communication site, a user station and a remote unit allowing the communication center to communicate with the user station over a user channel and communicate with the remote unit over a system channel such that the communication center can monitor, operate or control the remote unit on as needed basis.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: December 12, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Mohammad Laham, Charles Sanford
  • Patent number: 6157810
    Abstract: A system and method for transmitting a radio frequency (RF) signal in a RF bandwidth over a low bandwidth medium, e.g., in-building cabling, which has a transmission bandwidth below the RF bandwidth. The system has a unit for intercepting the RF signal and a global reference oscillator for distributing a global reference tone of high stability to the entire system. Local oscillators are controlled by adjustment signals derived from this global reference tone to deliver RF reference tones of high stability required for mixing the RF signal to obtain an intermediate frequency (IF) signal which is fed through the low bandwidth medium. The global reference tone is preferably delivered through the same low bandwidth medium to desired locations, such as remote coverage sites in a network for cellular communications, cordless telephony, local RF communications, interactive multi-media video, high bit-rate local communications.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: December 5, 2000
    Assignee: LGC Wireless, Inc
    Inventors: John B. Georges, David M. Cutrer
  • Patent number: 6148184
    Abstract: An RF direct down-conversion topology that is insensitive to leakage and device mismatching is presented. According to the system the RF signal is split into two arms with each arm having a mixer. Each mixer has two inputs namely a phase modulated local oscillator signal and the RF information signal. The phase modulated local oscillator signal between each arm differs by a 90 degrees phase shift. The output of the mixers is subtracted and the output of the subtractor is mixed with the phase modulation signal. The output of the third mixer represents the base band. A low pass filter then removes the unwanted signals.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: November 14, 2000
    Assignee: Mitel Corporation
    Inventors: Tajinder Manku, Leonard MacEachern
  • Patent number: 6148196
    Abstract: A system for transmitting instructions from a master control facility (50) to a number of remotely located player units (11-14). The remotely located player units communicate through a mobile cell site (10). Cellular communication links (16) are provided to link the remote units (11-14) to cell site (10). Cell site (10) is linked to a satellite arrangement (20) via a communication link (21). The master control facility is linked to the satellite arrangement via communication link (23).
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: November 14, 2000
    Assignee: Motorola, Inc.
    Inventor: William John Baumann
  • Patent number: 6141533
    Abstract: A mobile repeater (300) is improved to include a database (303) that allows the mobile repeater to store registrations received from subscriber units. Additionally, the mobile repeater may include a voice on control switching element (309) for use with an extended control channel. Further still, the mobile repeater may include encryption elements (305-308) for the maintenance of encrypted control channels. In this manner, the mobile repeater may provide an improved quality of services to subscriber units.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: October 31, 2000
    Assignee: Motorola, Inc.
    Inventors: Christopher H. Wilson, Alan L. Wilson, John M. Gilbert
  • Patent number: 6125260
    Abstract: A method is for defining a radio frequency map to be used to isolate negative effects of undesirable radio frequency emitters on radio device communications, handheld and stationary. The method includes the steps of measuring C-band power corresponding to an L-band beam as part of an L-band footprint of a communication satellite, calculating various identifiable interference errors associated with the signal transmission path, and subtracting the interference errors from the original C-band power measurement resulting in a power value corresponding to undesirable radio frequency emitter interference at the location of the L-band beam. The resultant radio frequency map can then be used to reallocate frequency channels of operation used by radio devices, mobile phones for example, resulting in power savings in the radio device while maintaining a suitable signal-to-noise ratio.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: September 26, 2000
    Assignee: Globalstar, L.P.
    Inventors: Robert A Wiedeman, Vijaya K Gallagher, John A Serri
  • Patent number: 6125109
    Abstract: Signal delay and combining techniques are used with multipath signals to provide signal diversity gain within CDMA over-the-air repeater and low noise amplifier systems. An incoming signal from a remote user is typically processed through two processing paths, wherein one path adds a delay to the processed signal. The two signal paths are then combined and filtered through a sharp band pass filter, preferably a SAW filter. In an over the air repeater, the filtered signal is retransmitted towards a CDMA rake receiver at a base station, which can process the multipath signal to produce a clean signal representation. In a low noise amplifier, the filtered signal is transferred directly into a base station or repeater. The use of SAW filters protect the latter stages of the low noise amplifier, and also protect the base station from out-of-band signal interference.
    Type: Grant
    Filed: February 24, 1998
    Date of Patent: September 26, 2000
    Assignee: Repeater Technologies
    Inventor: Matthew P. Fuerter
  • Patent number: 6122529
    Abstract: Apparatus and a method are disclosed for a wireless telephony system to eliminate blind areas where signal coverage is weak or non-existent by providing remote transceivers that are physically located in the blind areas. A central transceiver located with a base telephone station and tower mounted antenna receives wireless telephony signals being transmitted by the antenna to a wireless telephone and forwards it over either an dedicated or existing broadband distribution network, such as a cable television distribution network, to the remote transceiver which transmits the same telephony signals in the blind area to a wireless telephone operating in the blind area. Telephony signals originating from a wireless telephone operating in the blind area are received by the remote transceiver and forwarded over either the dedicated or existing broadband distribution network to the central transceiver which inputs the telephony signals to the base telephone station.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: September 19, 2000
    Assignee: Transcept, Inc.
    Inventors: John Sabat, Jr., Thomas J. Johnson, Kenneth C. Greenwood
  • Patent number: 6112091
    Abstract: The invention relates to a method of and a device for estimating system requirements of a radio telecommunication network (1). In a first step the area of interest is split in geographical regions with regard to their structural environment. In a next step each region is split in homogeneous zones with regard to such parameters as the height of the structures, their height variation, the distribution of the height variation and the type of vegetation. Each zone is further classified with regard to the typical building materials used and information of the system deployment conditions. From the area of each zone a preliminary number of radio access units (2) is calculated using its classification data and the range of the radio access unit (2) in such a zone. Thereafter the number of radio access units (2) of a zone or a group of like zones is examined with respect to the communication capacity required.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: August 29, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Cornelis Adrianus Henricus Maria Van Puuenbroek, Jan Arie Van Houwelingen, Sten Erik Blomstergren, Frank Bastiaan Brouwer
  • Patent number: 6108551
    Abstract: The present invention relates to a method and radio unit for assigning transmission turns to a radio unit (RU2) wishing to operate on a direct mode channel (f1). To assign the transmission turns in a controlled manner, said radio unit (RU2) monitors the quality of the traffic (101) conducted on the direct mode channel, and if the quality of the traffic (101) falls below a predetermined value, said radio unit (RU2) starts to transmit its transmission (120) on said direct mode channel.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: August 22, 2000
    Assignee: Nokia Telecommunications Oy
    Inventors: Mika Lehmusto, Mika Heiskari
  • Patent number: 6108535
    Abstract: A mobile communication system including operation management of traffic machines, includes mobile radio terminals for receiving predetermined communication data, and which can be carried by a user of mobile communication; at least one traffic machine for transporting the user having the terminals; an operation management element for managing operation of the traffic machine by operation management data which are generated from predetermined operation data; and a line management element for managing radio lines used by the terminals on the basis of any one of position data and position change data of the terminals.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: August 22, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Osamu Moriya, Takafumi Sakamoto, Mutsumu Serizawa
  • Patent number: 6104910
    Abstract: A mobile relay station including a mobile base having mounted thereon a mast for holding antenna, the mast being guyed over spreaders and connected to the sides of the base without permanent connection to the ground.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: August 15, 2000
    Inventor: Kerry R. Koths
  • Patent number: 6101171
    Abstract: A method and system that enables a wireless repeater within the personal handy phone system to switch the communication mode of each slot within its communication interface. Specifically, the repeater is able to function as a cell station while communicating with a portable station and function as a portable station while communicating with a cell station. For instance, when the repeater communicates with a cell station, it switches the communication mode of a desired slot within its communication interface into portable station communication mode. Conversely, when the repeater communicates with a portable station, it switches a desired slot within its communication interface into cell station communication mode. Since a repeater implemented with the present invention is able to switch the communication mode of each slot within its communication interface, the amount of internal circuitry required within the repeater is significantly reduced.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: August 8, 2000
    Assignee: VSLI Technology, Inc.
    Inventors: Satoshi Yoshida, Patrick Feyfant, Varenka Martin, Laurent Winckel, Philippe Gaglione, Oliver Weigelt, Denis Archambaud
  • Patent number: 6088570
    Abstract: In a conventional Time Division Multiple Access (TDMA) wireless system, the specified distance between a mobile unit and the base transceiver system (BTS) cannot exceed predetermined distances because of time slot synchronization constraints. Furthermore, varying distances between mobile units and the BTS, as well as Rayleigh fading, caused by destructive interference effects between direct and reflected signals, create extreme signal strength variations in the initial uplink signal from the mobile stations. The use of spatially-diverse antennas for receiving uplink signals provides diversity gain and mitigates deep fades. Furthermore, selecting the stronger of the spatially-diverse uplink signals mitigates deep fades and reduces frequency usage in the backhaul frequency band. In this approach to extending TDMA system coverage, in-band translator components are located in the center of remote cells which would normally contain a base transceiver system (BTS).
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: July 11, 2000
    Assignee: Airnet Communications Corporation
    Inventors: Michael A. Komara, Thomas R. Schmutz, Jeffrey W. Smith, Stephen J. Foley
  • Patent number: 6088592
    Abstract: A wireless system architecture whereby high efficiency broadband transceiver systems can be deployed at an initial build out stage of the system in a cost-efficient manner. A home base station location is identified within each cluster of cells and rather than deploy a complete suite of base station equipment at each of the cells in the cluster, inexpensive translator units are located in the outlying cells serviced by the home base station in which low traffic density is expected. The translators are connected to directional antennas arranged to point back to the home base station site. The translators are deployed in such a way which meshes with the eventually intended frequency reuse for the entire cluster of cells. The translator to base station radio links operate in-band that is, within the frequencies assigned to the service provider. The available frequency bands are divided into at least two sub-bands, with frequency translations ocurring entirely within a given sub-band.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: July 11, 2000
    Assignee: Airnet Communications Corporation
    Inventors: John R. Doner, Ronald R. Carney, Michael A. Komara
  • Patent number: 6078825
    Abstract: A wireless headset system for use with, e.g. mobile phones, and which incorporates a wireless headset which communicates with a base station via magnetic inductive coupling or radio frequency signals to dial and send or receive calls via a conventional phone, e.g. a mobile phone, attached to the base station. In one embodiment, the mobile phone is carried in the base station which is worn by the user.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: June 20, 2000
    Assignee: Advanced Mobile Solutions, Inc.
    Inventors: Stan S. Hahn, Genrik Yegiazaryan, Sung Kee Baek, David S. Hishinuma, Robert Jetter
  • Patent number: 6055429
    Abstract: A distributed wireless call processing system includes a plurality of mobile transceiver units each having the capability to simultaneous receive, reprocess and retransmit a plurality of calls to form a plurality of call paths within the network formed by the units. Within each mobile transceiver unit, a multilevel audit buffer is maintained which is used to store identification and power level data in accordance with a vector ring diagram. The first level of each mobile transceiver unit stores data relating to directly reachable transceiver units. Successive levels of each transceiver's audit buffer store data which has been downloaded upon request from the audit buffers of other transceiver units. The multilevel audit buffering provides for establishment of call vectoring paths between a seeking transceiver unit and a desired transceiver unit.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: April 25, 2000
    Inventor: Michael R. Lynch
  • Patent number: 6055411
    Abstract: A radio communication system comprises at least one switching system, at least one first CS (Cell Site) connected to the switching system, at least one second CS which is not connected to the switching system, and a plurality of PSs (Personal Station). The first CS accommodates a plurality of radio channels that can be dynamically established between the PSs and the second CS. The second CS accommodates a plurality of radio channels that can be dynamically established between the PSs, the first CS and other second CS, and has the function of relaying the radio channels.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: April 25, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhito Ishida, Noriyuki Sugiura
  • Patent number: 6052557
    Abstract: A direct mode repeater for forwarding traffic between mobile stations communicating on a direct mode channel, includes a transceiver unit for forwarding radio messages between mobile stations communicating on a direct mode channel, and a control unit for controlling the operation of the repeater and for directing the transceiver unit to the direct mode channel. In order to prevent simultaneous transmission of several repeaters on the same direct mode channel. The transmission on the direct mode channel of the repeater that forwards radio messages on the direct mode channel contains at desired intervals the identifier of the repeater, the identifier indicating that the repeater forwards traffic on the direct mode channel.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: April 18, 2000
    Assignee: Nokia Telecommunication Oy
    Inventors: Kimmo Kinnunen, Osmo Schroderus
  • Patent number: 6047160
    Abstract: A base station is configured to facilitate its rapid deployment to provide trunked radio communication system. The base station includes a receiving section and a transmitting section functioning as a repeater operating on a single trunked duplex channel. The base station also includes another receiving section for interrogating the presence of pre-existing RF energy in a given geographic area before allowing the base station to become active. This prevents a newly introduced deployable base station from interfering with pre-existing deployable or fixed base stations.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: April 4, 2000
    Assignee: Ericsson Inc.
    Inventors: Mark D. Priest, Peter M. Mangum, Steven T. Dreon
  • Patent number: 6044062
    Abstract: A wireless network system includes a server having a server controller and a server radio modem, and a number of clients each including a client controller and a client radio modem. The server controller implements a server process that includes the receipt and the transmission of data packets via the radio modem. The client controllers of each of the clients implements a client process that includes the receipt and transmission of data packets via the client radio modem. The client process of each of the clients initiates, selects, and maintains a radio trasmission path to the server that is either a direct path to the server, or is an indirect path or "link" to the server through at least one of the remainder of the clients.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: March 28, 2000
    Assignee: CommUnique, LLC
    Inventors: Edwin B. Brownrigg, Thomas W. Wilson
  • Patent number: 6037868
    Abstract: An alarm method and apparatus in a mobile communication repeating system having a plurality of repeating modules for informing a base station that a repeating module is out of order. The repeating modules respectively check whether a self repeating module is out of order. A repeating interface unit informs the base station of an alarm state according to a failure of a particular repeating module.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: March 14, 2000
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Heon Oh, Kwang-Il Ko
  • Patent number: 6029048
    Abstract: A repeater system includes a plurality of repeaters, a low level combining circuit, and a tower unit for attachment to an antenna tower. The tower unit includes a linear amplifier, duplexer, filter, and low noise amplifier. The repeaters do not have final amplifiers. Instead, the low level combining circuit couples the signals from each repeater to the tower unit. The output from the linear amplifier in the tower unit is coupled to an antenna over a relatively short cable.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: February 22, 2000
    Inventor: James E. Treatch
  • Patent number: 6026277
    Abstract: A mobile communication system employs moving base stations moving in the direction of flow of traffic moving along a roadway. The moving base station communicates with fixed radio ports connected to a gateway office. A plurality of moving base stations are spaced apart on a closed loop and move with the flow of traffic along one roadway on one leg of the loop and with a flow of traffic on another roadway in another leg of the loop. The moving base stations communicate with a plurality of fixed radio ports connected by a signal transmission link to a gateway office which, in turn, is connected to the wire line network. The moving base stations are each provided with a pair of directional antennas with one antenna directed toward the flow of traffic and another antenna directed to the fixed radio ports.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: February 15, 2000
    Inventor: Charles D. Gavrilovich
  • Patent number: 6023602
    Abstract: A coaxial repeater of the present invention includes a connector having an L shaped metal piece 1 and an insulating casing 2. The connector is mounted in an introducing hole 3a-1 provided in a casing 3. A connecting portion 8a of an amplifier portion 8 is electrically connected to one of protrusions of the connector and a center conductor 4a-1 of an adapter 4-1 is fitted in and electrically connected to the other protrusion of the connector. The introducing hole 3a-1 becomes a space 3g-1 when the adapter 4a-1 and the amplifier portion 8 are mounted. The space 3g-1 is shielded from a receiving space 3b of the casing 3. With the coaxial repeater constructed as mentioned above, it is possible to improve electrical characteristics of a device operating in a high frequency band, facilitate the maintenance thereof, reduce the number of parts thereof and reduce the cost of parts.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: February 8, 2000
    Assignee: NEC Corporation
    Inventors: Yasuhiro Kitajima, Kouichi Kawada
  • Patent number: 6023616
    Abstract: A broadcast receiving system for use with an FM radio transmitter in a vehicle includes an adapter unit and an antenna unit. The adapter unit includes a connector to a vehicle's existing power system, e.g., cigarette lighter receptacle. The adapter unit receives audio program signals from the antenna unit, and retransmits them to a vacant FM channel or to an intermediate frequency channel of the vehicle's FM radio receiver. The antenna unit receives radio broadcast signals having frequencies in the range of about 300 MHZ to about 4000 MHz from satellites and terrestrial repeaters.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: February 8, 2000
    Assignee: CD Radio Inc.
    Inventor: Robert D. Briskman
  • Patent number: 5999814
    Abstract: A method of handling oscillating mobile station handoffs between cells in a cellular telecommunications network. The method comprises the steps of detecting whether a mobile station (MS) is exhibiting an oscillating handoff pattern, determining whether the MS's signal strength with the MS's serving cell is above a safe signal strength threshold, and inhibiting handoffs of the MS upon determining that the signal strength is above the safe signal strength threshold. The oscillating handoff pattern is detected by first detecting a sequence of handoffs of the MS in which the number of handoffs is twice the number of cells involved in the handoffs, measuring an inter-handoff time period between each handoff in the sequence, and determining whether each inter-handoff time period is less than a first threshold value.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: December 7, 1999
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Angelo Cuffaro, Mahshid Izady