Patents Examined by W. Todd Baker
  • Patent number: 5875184
    Abstract: A method for transferring data packets in a network of user stations is described, the data packets being transferred over a set of channels with the frequency-hopping method and the channels being in this context selected for data transfer in accordance with a frequency-hopping pattern in temporally successive time slots. Time slots in which a user station is authorized to transmit are assigned to it as needed.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: February 23, 1999
    Assignee: Altvater Air Data Systems GmbH & Co.KG
    Inventors: Ulrich Altvater, Stefan Bohmer
  • Patent number: 5870398
    Abstract: An InterPacket Gap (IPG) timer software object is given data packets, aka datagrams, from a system for transmission over a network medium. The IPG timer interfaces with a system-supplied timing mechanism for introducing an IPG between transmitted datagrams. Datagrams given to the IPG timer are enqueued for delivery, and, through the use of the system-supplied timer mechanism, delivered in the same order in which they were received to the network medium with a minimum time interval between the transmission of one datagram and the end of the transmission of the previous datagram.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: February 9, 1999
    Assignee: International Business Machines Corporation
    Inventor: Christopher Michael Kotchey
  • Patent number: 5870382
    Abstract: An ATM exchange network system in which a first equipment and a second equipment are connected through a duplex communication line comprising a working line and a protection line. In this system, each of the first equipment and second equipment provides: a bridging unit which bridges the working line and the protection line on the transmission side; a switch for selecting the working line or the protection line on the reception side; a K-byte generating function for generating byte information containing information for realizing the APS; a function of receiving the K byte information from the protection line, analyzing the received information, placing the prescribed information in the K byte and realizing the APS; and a function of changing over the switch. Thus, the reliability with respect to a line failure in the ATM exchange network can be improved.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: February 9, 1999
    Assignee: Fujitsu Limited
    Inventors: Shunichi Tounai, Yoshiyuki Karakawa
  • Patent number: 5867500
    Abstract: In an arrangement for transmitting traffic in asynchronous transfer mode (ATM) cells in downstream and upstream frames between an out station and a base station, upstream traffic cells are queued in each outstation in sequential order for subsequent transmission in upstream frames to the base station. Each outstation sends requests for allocation of timeslots to the base station, each said allocation request being transmitted to the base station in a respective time slot of a said upstream frame. The base station includes means for performing a periodic ranging measurement with each outstation whereby to determine a corresponding timing offset between the base station and that outstation and for communicating that timing offset to the outstation. Each outstation controls the timing of its cell allocation requests such that the cell allocation requests received by the base station in each upstream frame are each in a respective predetermined time slot of that frame.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: February 2, 1999
    Assignee: Northern Telecom Limited
    Inventors: Graham Ainsley Dolman, Graeme Gibbs, Gary Halfyard, Andrew John Booth
  • Patent number: 5864543
    Abstract: In a time division duplex (TDD) system, compensation measurements are made for the transmission circuitry during the receive portion of the TDD cycle and compensation measurements are made for the receive circuitry during the transmit portion of the TDD cycle. A base station has multiple antennas for spatial, as well as spectral, spreading and despreading of discrete multitone spread spectrum (DMT-SS) communications. Each antenna has its own transmission path components and receive path components. The transmit amplifier, for example, in the transmit path and the receive amplifier, for example, in the receive path tend to drift in their characteristics over time. The invention manages the sequential testing of each respective transmission path and receive path for each antenna. The invention measures the drift of the transmit path components and the receive path components and prepares compensating weights to be applied to signals processed in each path.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: January 26, 1999
    Assignee: AT&T Wireless Services, Inc.
    Inventor: Elliott Hoole
  • Patent number: 5864549
    Abstract: In the overlayed operation of two cellular radio systems one of the two systems is a small-scale or indoor system and the other is a large-scale or outdoor system. The indoor system monitors the operation of the outdoor system and detects, which part of the available radio resources are temporarily not in use in the outdoor system. The indoor system dynamically selects an unused outdoor channel for indoor operation. The indoor radio traffic is divided into cyclically occurring time slots and some of the slots are used for monitoring the existing radio communication on other outdoor channels so that fast changes according to changing traffic and interference conditions are possible.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: January 26, 1999
    Assignee: Nokia Mobile Phones, Ltd.
    Inventors: Harri Honkasalo, Zhi-Chun Honkasalo, Ari Hottinen
  • Patent number: 5864547
    Abstract: A method and system for controlling uplink power for signal transmission in a satellite communication system employing on-board demodulation and remodulation and having a plurality of user terminals that are linked by and that communicate with each other by way of a satellite relay system. A downlink error rate of the data in a downlink data stream is determined based on known data bits. An end-to-end error rate of the uplink data stream and the downlink data stream is determined. An error rate of the signal transmission is then determined based on the downlink error rate and the end-to-end error rate. The signal transmission is then controlled based on the error rate of the signal transmission.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: January 26, 1999
    Assignee: Hughes Electronics Corporation
    Inventors: Andrew L. Strodtbeck, Jennifer L. Vollbrecht
  • Patent number: 5859845
    Abstract: A control signal generated as a result of the actuation of each of control switches of a control section is multiplexed by a multiplexing section, and the thus multiplexed signal is sent to a multiplex transmission line. Load control sections receive the multiplexed control signal sent over the multiplex transmission line. The load control sections then control the electric power fed to a corresponding one of loads on the basis of the received control signal. Control data, representing the form of output control of the corresponding load which is controlled as a result of the actuation of the control switch, are stored according to the control switches. Control means control the electric power fed to the load on the basis of the control signal using the control data.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: January 12, 1999
    Assignee: Yazaki Corporation
    Inventors: Tatsuaki Oniishi, Akiyoshi Kanazawa, Nobuhiro Imaizumi
  • Patent number: 5850398
    Abstract: A transmit scheduler maps connections to scheduled time slots in an ATM network in such a manner that minimizes burstiness in an output cell stream. The smoothness in the resulting cell streams reduces the probability of loss in the network and also assures that a connection does not exceed a preestablished bandwidth. The invention can be utilized with service with a constant bit rate (CBR), a variable bit rate (VBR) and an available bit rate (ABR) traffic. Bandwidth factors are established for cells to be transmitted as a percentage of total bandwidth of the ATM network. Lists are maintained for cells to be transmitted with each list assigned a bandwidth factor. The total bandwidth in the ATM network is apportioned into time slots according to established bandwidth factors and with different bandwidths being multiplexed across the total bandwidth. Cells are selected for transmission from the list of cells in accordance with available time slots and the bandwidth factors thereof.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: December 15, 1998
    Assignee: Hyundai Electronics America
    Inventor: Merrill K. King, Jr.
  • Patent number: 5850391
    Abstract: A mobile switching center (MSC) not equipped with the necessary hardware/software devices or modules communicates with a Shared Interworking Function node to provide an Interworking function (IWF) service to a particular mobile station. Control data associated with the requested IWF service are transported from the serving MSC to the SIWF node using basic and supplementary Integrated Service Digital Network User Part (ISUP) signals. Such control data are encapsulated into optional parameters within the transmitted ISUP signals and transparently transported from the serving MSC to the SIWF telecommunications node.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: December 15, 1998
    Assignee: Telefonaktiebolaget L M Ericsson
    Inventor: Kurt Essigmann
  • Patent number: 5848069
    Abstract: A method for selecting one link out of M outbound links in a linkset (10) coupling a first component and a second component is provided. The first component includes N devices coupled to the M links. The method includes the steps of first providing an X-bit code having 2.sup.x possible code combinations used for link selection, and assigning a predetermined number of code combinations for each device where the assigned code combinations for a device is a function of an unique device number associated with each device. The outbound link is then selected for transmitting outbound data based on the code combination assignment.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: December 8, 1998
    Assignees: DSC Telecom L.P., MCI Communications Corp.
    Inventors: Richard E. Milne, Timothy M. Dwight
  • Patent number: 5841780
    Abstract: Determining by a telecommunication switching systems in response to the initialization of a new BRI interface if a communication terminal connected to the new BRI interface is presently active on another BRI interface within the telecommunication switching system. If the answer is yes, then the telecommunication switching systems automatically transfers all active calls to the new BRI interface from the other BRI interface preventing the loss of the active calls.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: November 24, 1998
    Assignee: Lucent Technologies Inc.
    Inventors: Bruce M. Bales, Forrest L. Coleman
  • Patent number: 5818832
    Abstract: A local multipoint data distribution system (10) simultaneously accommodates many communication sessions occurring at a variety of data rates. Space surrounding cell sites (12) is partitioned into sectors (16), and the spectrum is allocated so that adjacent sectors (16) use different spectrum portions, but the entire spectrum is reused numerous times. A time diversity scheme allocates different numbers of time slots (54) to different calls. Time slot identifiers are assigned in contiguous blocks in an assigned numbering system (56). The time slot identifier assignments are translated into a counted numbering system (58) which causes the time slots (54) for any call to be distributed throughout a frame (48) and interleaved with time slots (54) assigned to other calls. Data communications use a common modulation format and a modulation order that is specifically adapted to a particular call.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: October 6, 1998
    Assignee: SiCOM, Inc.
    Inventor: Ronald D. McCallister
  • Patent number: 5815492
    Abstract: Method and system for adapting access to a packet switching network including a dynamic bandwidth adjustment mechanism which continuously monitors the mean bit rate of the signal source and the loss probability of the connection. These values are filtered to remove noise and then used to test whether the values fall within a pre-defined acceptable adaptation region in the mean bit rate, loss probability plane. Values falling outside of this region trigger bandwidth adaptation procedures which, in turn, result in acquiring a new connection bandwidth, and determining new parameters for the adaptation mechanism. Furthermore, the mechanism controls the number of connections that can be adapted by a single processor, given its processing capability. It ensures fairness between the connections in the sense that it prevents a single connection from using, on the average, a greater portion of the processor capacity than it should.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: September 29, 1998
    Assignee: International Business Machines Corporation
    Inventors: Jean-Marc Berthaud, Pierre-Andre Foriel, Claude Galand, Stephane Lengelle, Laurent Nicolas
  • Patent number: 5812530
    Abstract: A network emulator in asynchronous transfer mode, consisting of emulating the performance of a digital network of integrated wideband services operating in asynchronous transfer mode, with no need to use said network, or else emulating intense operating conditions typical of a very loaded network on anunloaded network, having a line interface module (1), one or several central modules (2), a control module (3), and an operating module (4), having an electro-optical converter (9), a series/parallel converter in receiving, and a parallel/series converter in transmitting, as well as a network terminator (11), with asynchronous transfer mode, and a bit error rate generator, the central module (2) or modules being configured by a variable delay block (12), a cell error block (13), a cell loss block (14), an erroneous insertion block (15), and a constant delay block (16).
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: September 22, 1998
    Assignee: Telefonica De Espana, S.A.
    Inventors: Luis Merayo Fernandez, Ma Luisa Mola Morales, Ma Angeles Barbero Palomero, Carmen Cesar Vicente
  • Patent number: 5799000
    Abstract: In a discrete tone system, a base station receives a transmission burst from a remote unit being installed that includes delay compensation pilot tones that are uniformly spread throughout the transmission bandwidth. The arrival time transmission burst is not synchronized with the other remote units transmitting to the base station. The base station measures the phase delay of each tone and calculates the delay of the remote unit from the slope of the line of phase angle versus tone frequency. The base station transmits a signal to the remote unit that includes the magnitude and direction of the delay, which allows the remote unit to adapt the timing of its transmission to be synchronized with the other remote units.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: August 25, 1998
    Assignee: AT&T Wireless Services, Inc.
    Inventor: Elliott Hoole
  • Patent number: 5799002
    Abstract: The adaptive bandwidth throttling system implements a graceful diminution of services to the clients by delaying a first class of services provided by a network server in response to the effective bandwidth utilized by this network server exceeding a first threshold. If the demand for the bandwidth by this network server exceeds a second threshold, the bandwidth throttling system escalates the throttling response and blocks the first class of services from execution and can also concurrently delay execution of a second class of services. The implementation of the throttling process can be varied, to include additional levels of response or finer gradations of the response, to include subsets of a class of services. In addition, the threshold levels of bandwidth used to trigger the throttling response can be selected as desired by the system administrator.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: August 25, 1998
    Assignee: Microsoft Corporation
    Inventor: Murali R. Krishnan