Patents Examined by G. J. Oehling
  • Patent number: 5987099
    Abstract: A wireless telephone system provides telecommunications services for personal wireless telephone sets over an area which is divided into service cells. Each of the cells is defined by reception characteristics of a plurality of radio base stations within the cell. The telephone system includes a service controller and a port being wireline connected between each radio base station and the service controller. The service controller selects radio base stations for setting up radio links with wireless sets of calling or called persons. A base station which serves a wireless set and surrounding idle base stations monitor strengths of radio signals received from the wireless set and report running averages of the monitored signal strengths to the service controller. Movement of the wireless set from one cell to another cell during a call is detected as a drop in the running average reported by the serving base station.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: November 16, 1999
    Assignee: Northern Telecom Limited
    Inventors: Keith Daniel O'Neill, Alan Morris Redmond, Jin Kue Wong, Shoji Matsushita, David Charles Ploeg, Christian Jacques Szpilfogel, Peter David Gale, Garry Don Mah, William Owen Bird
  • Patent number: 5943396
    Abstract: In a micro cellular system (MCS) which co-exists with a cellular system (CMTS) in a frequency band, fraudulent use of the MCS when it is moved from the CMTS to the location of another CMTS is prevented by providing a control unit 2 in the MCS which controls the overall operation of the MCS and a system ID receiving and judging unit which is capable of receiving all the downward control channels used in the CMTS. When the system ID receiving and judging unit receives a system ID transmitted from the CMTS which matches a system ID stored in the MTS, the control unit is allowed to start the operations of the MCS. Otherwise, the MCS is disabled. Therefore, if the MCS moves to another CMTS zone where the system ID is different, it is impossible to operate the MCS.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: August 24, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd..
    Inventors: Masaki Terashima, Jun Yamada, Jun Nagamatsu
  • Patent number: 5898758
    Abstract: The instant invention is a paging device which couples to a cellular telephone allowing independent use of the cellular telephone and the paging unit. The paging unit includes a speaker for converting received signals into a dial tone for placement against either a conventional land based telephone or a cellular telephone for automatically redialing of numbers received by the paging unit. The paging unit can be coupled to a compatible cellular telephone wherein the pager and telephone can be carried as a single unit allowing screening of incoming calls and an automatic callback of received paged calls.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: April 27, 1999
    Inventor: Michael Rosenberg
  • Patent number: 5657374
    Abstract: A method of communicating a plurality of two-way inbound/outbound cellular telephone transmissions between a base station and a physically remote cell using a set of channels. At the base station, a plurality of outbound telephone transmissions, received from a network, are analog modulated onto respective ones of RF analog outbound channel carriers. The modulated analog channel carriers are combined to form a single RF analog outbound signal representing all of the outbound telephone transmissions in the set of channels. The analog outbound combined signal is subsequently digitized into a single stream of outbound digital samples and transmitted to the remote cell. At the remote cell, the stream of digital samples is converted back to the RF analog outbound combined signal and broadcasted directly to mobile units in the cell. Further, the remote cell receives a plurality of simultaneous inbound telephone transmissions from the mobile units as an RF analog inbound combined signal.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: August 12, 1997
    Assignee: ADC Telecommunications, Inc.
    Inventors: David S. Russell, Larry G. Fischer, Philip M. Wala
  • Patent number: 5655004
    Abstract: A request for communication service between a mobile communication device, e.g., a cellular telephone, and a recipient is authenticated using a request for service message that includes an identification code specific to the mobile communication device and a transmitted authentication code which represents a cumulative total of the prior usage of the mobile communication device. The transmitted authentication code is received at a central processing facility and compared to a stored authentication code for the mobile communication device. Communication is initiated between the mobile communication device and the recipient if the transmitted authentication code and the stored authentication code match within established tolerances.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: August 5, 1997
    Inventor: William F. Holbrook
  • Patent number: 5644622
    Abstract: A microcellular communications network has multiple base-station units all at a common location. Each unit has all-digital transmitters and receivers coupled by fiber optic cable to individual remote locations each having power amplifiers and diversity receivers which convert the RF signals directly between analog RF and digital signals in the RF band at the remote locations. The system includes filtering, framing, and multiplexing of multiple channels. The system also provides passive handoff and passive switching. The system may be deployed in two different stages.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: July 1, 1997
    Assignee: ADC Telecommunications, Inc.
    Inventors: David S. Russell, Larry G. Fischer
  • Patent number: 5642405
    Abstract: A microcellular communications network includes a plurality of base station units and corresponding antenna units. Each includes either conventional transmitters and receivers or all digital transmitter and receiver equipment, and interface circuitry to a mobile telecommunications switching office. The microcell traffic output is applied to a frame generator/multiplexer. The output of the frame generator/multiplexer is applied to a digitally modulated laser and conveyed by fiber to a remote antenna unit, which demultiplexes the microcell traffic signal, applies it to a digital-to-analog converter, and applies it to a power amplifier and a main antenna. The received signals are filtered, digitized, multiplexed together and transmitted over the optical fiber back to the base station. The strongest signal is selected for use. Deployment of an all digital microcellular communications system occurs in two stages.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: June 24, 1997
    Assignee: ADC Telecommunications, Inc.
    Inventors: Larry G. Fischer, Philip M. Wala, Jeffrey Brennan
  • Patent number: 5633911
    Abstract: A telepoint communication system 100 where the telepoint communication unit (TCU) 125 reserves a communication channel on the communication link 126, where the communication link 126 couples the telepoint base station (TBS) 110 to the public switched telephone network (PSTN) 105. Reserving the communication channel is accomplished by communicating information packets 130,133,136,140,143 and 146 between the TCU 125 and the TBS 110. Reserving the communication channel enables the TCU 125 to ensure the reserved communication is available to route incoming calls received on the telepoint communication system 100 to the TCU 125, particularly when an incoming call is expected.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: May 27, 1997
    Assignee: Motorola, Inc.
    Inventors: Wen K. Han, See W. Ng, Prashanth M. L. Gowda
  • Patent number: 5627879
    Abstract: A microcellular communications network includes a plurality of base station units and corresponding antenna units. The base station units are housed in a common location. Each includes either conventional transmitters and receivers or all digital transmitter and receiver equipment, and interface circuitry to a mobile telecommunications switching office. The microcell traffic output is applied to a frame generator/multiplexer. The output of the frame generator/multiplexer is applied to a digitally modulated laser. The laser output is conveyed by fiber to a remote antenna unit, which demultiplexes the microcell traffic signal and applies it to a digital-to-analog converter. The output of the digital-to-analog converter is applied to a power amplifier, which in turn is connected to a main antenna. RF signals from the mobile units are received at both a main and a diversity antenna. The received signals are filtered, digitized, multiplexed together and transmitted over the optical fiber back to the base station.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: May 6, 1997
    Assignee: ADC Telecommunications, Inc.
    Inventors: David S. Russell, Larry G. Fischer, Philip M. Wala, Charles R. Ratliff, Jeffrey Brennan
  • Patent number: 5625674
    Abstract: A cordless telephone system includes a single base unit and at least two remote handunits, where the base unit employs two transmitter channels coupled together through a low impedance and coupled to a single antenna. The transmitter channels include voltage controlled crystal oscillators (VCXOs) and frequency tripler circuitry, rather than PLLs in order to keep intermodulation distortion at the outputs of the transmitter amplifiers to a minimum.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: April 29, 1997
    Assignee: Thomson Consumer Electronics, Inc.
    Inventor: Samuel R. Paniccia, Jr.
  • Patent number: 5625670
    Abstract: A system (100) for transmitting information from one of a plurality of originating processors A-N to at least a plurality of destination processors (A-N) which may be transported during operation in accordance with the invention includes at least one gateway switch (14), a gateway switch storing information received from one of the at least one originating processor prior to transmission of the information to the at least one destination processor; a RF information transmission network (302) for transmitting stored information received from one of the at least one gateway switch by RF transmission to at least one destination processor; at least one interface switch (304), an interface switch connecting a gateway switch to the RF transmission network and transmitting stored information received from one of the at least one gateway switch to the RF information transmission network; and wherein the information is transmitted to a receiving interface switch by the electronic mail system in response to an address
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: April 29, 1997
    Assignee: NTP Incorporated
    Inventors: Thomas J. Campana, Jr., Michael P. Ponschke, Gary F. Thelen
  • Patent number: 5621786
    Abstract: A passive handoff cellular communication system includes a cell divided into a plurality of zones. A base station is connected by transmission apparatus to a plurality of antenna units. The base station includes analog RF signal generation circuitry for generating a plurality of RF signals on different channels and a first switch responsive to a first control signal for switching and combining the RF signals to form a composite RF signal for each zone. Analog-to-digital conversion circuitry converts the composite signal for each zone to a digitized stream of samples and applies the samples to the transmission apparatus for transmission to each corresponding antenna unit.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: April 15, 1997
    Assignee: ADC Telecomminications, Inc.
    Inventors: Larry G. Fischer, Philip M. Wala, Jeffrey Brennan
  • Patent number: 5610971
    Abstract: A telephone for mobile application affords hands-free operation when the handset is seated in a cradle and hand-held operation when removed from the cradle. The two modes are automatically sensed by a reed switch in the handset operated by a magnet in the cradle. The back of the handset, which is accessible when in the cradle, contains a back keypad and a back display, and the front of the handset contains a front keypad and a front display along with a microphone and an earpiece. When the reed switch senses hands-free mode only the back keypad and display are enabled, along with an external speaker and microphone. When hand-held mode is sensed, the front keypad, display and audio functions are enabled.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: March 11, 1997
    Assignee: Delco Electronics Corporaiton
    Inventor: Karl D. Vandivier
  • Patent number: 5608781
    Abstract: The method of eliminating or reducing cloning of electronic identification serial numbers (herein ESN numbers) of cellular telephones involves programming the phone to generate and broadcast the valid ESN number only under certain circumstances. The method preventing utilizes either a standard cellular telephone or a cellular telephone with a uniquely configured user input device (for example, a credit card reader). The cell phone stores the valid ESN in one memory location and a pseudo ESN in another memory location. Upon "power up" of the cellular phone, the valid ESN number is stored in a third memory location and the pseudo ESN number is stored in the first memory location where the valid ESN number was originally stored. The pseudo ESN number is used during all cellular communications between the cellular telephone and the cellular telecommunications network unless certain user initiated events occur at the cell phone.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: March 4, 1997
    Inventor: Abe Seiderman
  • Patent number: 5602900
    Abstract: The cellular mobile telephone apparatus comprises a radio unit having an antenna, and a telephone unit which is connected to the radio unit via a line and is formed of a main unit and handset. To originate a call, a user dials the telephone number of an other party to be called. When the dialing is detected, a calling tone indicating to the user that the call being originated is generated from a speaker of the telephone unit. To start speech communication, it is necessary to designate and capture a speech channel in the radio channel. When the capture of the designated speech channel is detected, the calling tone is stopped. After the communication, there are three types of terminating the call. At the end of communication, the type of the termination is detected and the corresponding synthesized voice message is generated.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: February 11, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kiyoshi Hattori
  • Patent number: 5600709
    Abstract: A digital-line telephone unit having two sets combined in one housing with partially shared circuitry. The unit connects directly to an integrated services digital network (ISDN) and includes both a handset with connection cord and a cordless set. A single digital line terminating unit, a main circuit for the corded telephone, and an auxiliary circuit for the cordless phone are connected to an internal digital bus. The main circuit and auxiliary circuit each contain a respective speech processor. Transmission from the corded handset and the cordless handset can occur simultaneously over different message channels of the ISDN.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: February 4, 1997
    Assignee: U.S. Philips Corporation
    Inventor: Jurgen Hoflinger
  • Patent number: 5598460
    Abstract: A system is provided for enhancing the reliability of rescue services by providing a 911 back-up system in which the termination of an emergency call is sensed followed by dialing the telephone number of a predetermined dispatch office, with the dispatch office providing a call back to the nearest PSAP to ascertain whether or not rescue is on the way. In one embodiment for cellular phone applications, termination of the emergency call is sensed by detecting the call-in-progress flag available on the phone's bus. In another embodiment, the originating phone transmits the telephone number of the originating phone to permit personnel at the dispatch office to call the originating phone back to ascertain the nature of the problem and if dispatched help has arrived.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: January 28, 1997
    Assignee: Tendler Cellular, Inc.
    Inventor: Robert K. Tendler
  • Patent number: 5598458
    Abstract: A software application program terminating a directory number for all incoming calls directed to the directory number and determining the operations that should be performed with respect to a mobile unit and a telephone station set. The software application program then directs the incoming calls to the mobile unit and telephone station set regardless of where these units are connected to a telecommunication system. An outgoing call from the mobile unit or telephone station set is switched to the software application program which then switches the outgoing call to the destination telephone station set as if the outgoing call had originated at the location of the software application program. Also, the originating directory number used in placing the outgoing call is the directory number associated with the software application program. Two dialing number plans are used: the directory number plan which consists of standard telephone numbers and a secondary dialing plan.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: January 28, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Bruce M. Bales, Gary L. Griffith, Vijai Prakash
  • Patent number: 5594782
    Abstract: A multiple mode, personal, wireless communications system exists within a radiotelephone network serving general customers and provides additional services to a select group of customers. The system uses handsets (32) which automatically switch between a standard cellular radiotelephone mode of operation (1901) and an enhanced cordless mode (1420) when the handsets (32) are within range of pico cells (26) that are interconnected to the public switched telephone network (20). Each pico cell is controlled via a framework of overlay cells (10b) that operates independently of the radiotelephone network and uses a unique control protocol on a small number of reserved cellular channels. Each pico cell consists of a spectrally dynamic, non-capturing, frequency agile, multi-purpose base station (26) provided at customer-selected locations to cooperate with the overlay cell framework. Each pico cell is capable of supporting multiple handsets (32) and uses low power operation that achieves limited coverage.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: January 14, 1997
    Assignee: GTE Mobile Communications Service Corporation
    Inventors: Robert G. Zicker, John K. Dion
  • Patent number: 5594778
    Abstract: A radiotelephone (101) has a memory, a display (127) and a keypad (117) with at least one key (121) to produce at least a first function key signal and a second function key signal, and a plurality of data keys (119). First, a first function key creates a first function key signal, turning on the radiotelephone (209); second, a phone number is selected (215). Third, the first function key creates a second function key signal from said first function key, activating the radiotelephone to call the phone number (207). Fourth, a second function key creates a third function key signal disconnecting the radiotelephone from said call (211). Fifth, the second function key creates a fourth function key signal turning off the radiotelephone (213).
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: January 14, 1997
    Assignee: Motorola, Inc.
    Inventors: George W. Schaupp, Jr., Laura A. Sheley, Kirk W. Dailey