Due To Weather Patents (Class 455/505)
  • Patent number: 9553796
    Abstract: In one embodiment, a node in a shared-media communication network may determine a first directed acyclic graph (DAG) topology, wherein the first DAG topology has a particular direction. The node may determine a second DAG topology in the shared-media communication network based on the first DAG topology. The second DAG topology may share the particular direction of the first DAG topology, to prevent loops between the first and the second DAG topologies.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 24, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Jonathan W. Hui, Jean-Philippe Vasseur, Wei Hong
  • Patent number: 9143224
    Abstract: An apparatus and a method for automatically managing a satellite broadcasting service are disclosed. The apparatus may include a rain attenuation information collection unit to measure weather information and a satellite broadcast signal and to collect and provide satellite broadcast signal quality information corresponding to rain attenuation, a rain attenuation analysis unit to analyze rain attenuation information collected by region and to verify a rain attenuation level, a satellite broadcast transmission signal plan unit to generate a satellite broadcast signal change plan to change a satellite broadcast transmission signal by region based on the verified rain attenuation level, and a satellite broadcast transmission signal controller to transmit a signal change instruction to a satellite ground station for the satellite broadcast transmission signal to be changed based on the generated satellite broadcast signal change plan.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: September 22, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: In Jun Kim, Won Chan Jung, Jae Hoon Kim
  • Publication number: 20140370925
    Abstract: Various embodiments of a millimeter-wave wireless point-to-point or point-to-multipoint communication network in which the different atmospheric absorption rates of different millimeter-wave frequencies are utilized to improve communication performance of the entire system. The network comprises one or more communication systems operating at a millimeter-wave frequency, in which each system is comprised of at least one or more point-to-point or point-to-multipoint radio transceivers. In various embodiments, the different atmospheric absorption rates of different millimeter-wave frequencies are used to reduce electromagnetic interference, to compensate for changing path-loss conditions, and/or to optimize inter-link interferences to enhance communication performance.
    Type: Application
    Filed: June 16, 2013
    Publication date: December 18, 2014
    Inventor: Yigal Leiba
  • Patent number: 8890697
    Abstract: Mobile devices may minimize the radiation exposure to users by controlling the distance between the user, specifically the groin area, and the mobile device to a minimum distance. The reduction in exposure is realized due to the operation of the Inverse Square Rule on electromagnetic signal from the mobile device recognizing there is a steep fall off of signal strength resultant from increased distance between the head of the user and the source of the signal. Embodiments alert the user to a mobile device in the users pocket is in a transmission mode and thus should be removed from the users pocket to maintain operational distance between the user and the device to reduce signal absorption of the users reproductive organs. Enabled mobile devices detect the transmission mode and the acceleration of the device in determining whether to alert the user. Embodiments influence the user to maintain a minimum distance via alerts, interruptions and warnings.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: November 18, 2014
    Assignee: Green Swan, Inc.
    Inventor: Harry V. Lehmann
  • Patent number: 8885696
    Abstract: Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: November 11, 2014
    Assignee: DGS Global Systems, Inc.
    Inventors: Gabriel R. Garcia, Daniel Carbajal
  • Patent number: 8843156
    Abstract: In one aspect, a method to discover and prevent a communications disruption in a mobile environment includes receiving data at a mobile platform from a geographical database, determining if the mobile platform will be blocked by a blockage event from accessing a network in response to data extracted from the geographical database and avoiding the blockage event if the mobile platform will be blocked from accessing the network.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: September 23, 2014
    Assignee: Raytheon Company
    Inventors: Gregary B. Prince, John P. Pehowich, George M. Vachula
  • Patent number: 8824536
    Abstract: Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: September 2, 2014
    Assignee: DGS Global Systems, Inc.
    Inventors: Gabriel R. Garcia, Daniel Carbajal
  • Patent number: 8805280
    Abstract: An information processing apparatus includes a first communication unit that receives management data including at least identification information of content data from a different device by using a first communication method. The apparatus also includes an output unit that outputs a first display based on the management information received by the first communication unit. Further, the apparatus includes a selection acceptation unit that accepts a selection of the content data according to a selection operation on the first display. The apparatus additionally includes a second communication that sends a request for the content data of which the selection acceptation unit accepts the selection to the different device and receives the content data corresponding to the request by using a second communication method whose communication range is wider than that of the first communication method.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: August 12, 2014
    Assignee: Sony Corporation
    Inventors: Shigeki Wakasa, Yasuharu Ishikawa, Isao Soma, Hiroshi Nakayama
  • Patent number: 8634814
    Abstract: A method for passing content to at least one communicator device. The user of a communicator device registers with at least one service provider for delivering a plurality of different types of content to be passed to the at least one communicator device. A user defined priority is assigned to the at least one type of content. The user defined priority is stored on a computer readable medium. The different types of content are passed to the at least one communicator device based on the user defined priority.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: January 21, 2014
    Assignee: Locator IP, L.P.
    Inventors: Steven A. Root, Michael R. Root
  • Patent number: 8626213
    Abstract: The present invention relates to methods, a communication network node and a user equipment for detecting collision of physical cell identities in a communication network system comprising radio base stations each serving at least one cell through which user equipments are moving. Reference signals comprising reference symbols corresponding to a physical cell identity are sent from said radio base stations to said user equipments over a radio interface. Transmission gaps of reference symbols are inserted in the reference signal in order to perform a physical cell identity collision test. The user equipments are arranged to detect if any other radio base station is sending reference symbols corresponding to the same physical cell identity during the transmission gaps. Thereby a physical cell identity collision is detected.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: January 7, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Pal Frenger, Fredrik Gunnarsson
  • Patent number: 8594717
    Abstract: A method for identifying supported transmission channel configurations in a mobile communications apparatus, the method comprising: calculating the required power value for each transmission channel configuration; and performing a sequential comparison of: an indication of an available measured power value, and an indication of the required power for each transmission channel configuration; and identifying a particular transmission channel configuration as supported if the required power for the particular transmission channel configuration is less than the available power value; wherein: the sequential comparison is performed in order of magnitude of value of the indication of the required power; and the method further comprising stopping said comparison when a supported transmission channel configuration is identified.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: November 26, 2013
    Assignee: BlackBerry Limited
    Inventor: Gideon Roberts
  • Patent number: 8588691
    Abstract: An information processing apparatus includes a first communication unit that receives management data including at least identification information of content data from a different device by using a first communication method. The apparatus also includes an output unit that outputs a first display based on the management information received by the first communication unit. Further, the apparatus includes a selection acceptation unit that accepts a selection of the content data according to a selection operation on the first display. The apparatus additionally includes a second communication that sends a request for the content data of which the selection acceptation unit accepts the selection to the different device and receives the content data corresponding to the request by using a second communication method whose communication range is wider than that of the first communication method.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: November 19, 2013
    Assignee: Sony Corporation
    Inventors: Shigeki Wakasa, Yasuharu Ishikawa, Isao Soma, Hiroshi Nakayama
  • Patent number: 8576937
    Abstract: A transmission apparatus in a Multiple Input Multiple Output (MIMO)-based wireless communication system. The transmission apparatus includes at least two antenna groups each having at least two antennas, wherein the antenna groups are spaced apart by a first distance and transmit antennas in each antenna group are spaced apart by a second distance which is shorter than the first distance. A channel coding and modulation unit channel-codes and modulates a desired transmission data stream. A precoding unit precodes the channel-coded and modulated signal separately for each antenna group and each antenna in the same antenna group. Thereafter, a transmission processing unit transmission-processes the output signal from the precoding unit.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: November 5, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jin-Kyu Han, Clerckx Bruno, Ju-Ho Lee
  • Patent number: 8532684
    Abstract: The present invention relates to an interference reduction apparatus, an interference reduction method and a computer storage medium. The interference reduction apparatus can estimates the channel of the cells comprehensively to obtain the combination information and the interference power level information. The combination information and the interference power level information is used to combine at least one precoding matrix of he codebook with each other to generate a combined precoding matrix which acts as the strongest signal power from the interference reduction apparatus and the weakest interference from the neighboring cells.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: September 10, 2013
    Assignee: Institute for Information Industry
    Inventors: Chun-Che Chien, Tsung-Yu Tsai, Yi-Ting Lin
  • Patent number: 8175529
    Abstract: An information processing apparatus shares content data with a different apparatus which has the content data and management data including identification information of the content data and used for management of the content data. The information processing apparatus includes a management data acquisition section that controls a first communication section, which carries out proximity radio communication, to acquire the management data from the different apparatus. The information processing apparatus also includes a requesting section that controls a second communication section, which carries out short distance radio communication, to issue a request for the content data to the different apparatus. Further, the information processing apparatus includes a content data acquisition section that controls the second communication section to acquire the content data supplied in response to the request by the requesting section.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: May 8, 2012
    Assignee: Sony Corporation
    Inventors: Shigeki Wakasa, Yasuharu Ishikawa, Isao Soma, Hiroshi Nakayama
  • Patent number: 8131212
    Abstract: A controlled satellite link, comprising a reference unit for measuring signal attenuation over said link, and a control unit, associated with said reference unit, configured for controlling at least one link transmission parameter to dynamically adapt to changes in said measured signal attenuation.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: March 6, 2012
    Assignee: Elbit Systems Land and C41—Tadiran Ltd.
    Inventor: Shaul Laufer
  • Patent number: 8130726
    Abstract: For frequency bin error estimation, multiple hypotheses are formed for different frequency bin errors, pilot offsets, or combinations of frequency bin error and pilot offset. For each hypothesis, received symbols are extracted from the proper subbands determined by the hypothesis. In one scheme, the extracted received symbols for each hypothesis are despread with a scrambling sequence to obtain despread symbols for that hypothesis. A metric is derived for each hypothesis based on the despread symbols, e.g., by deriving a channel impulse response estimate based on the despread symbols and then deriving the metric based on the channel impulse response estimate. In another scheme, the extracted received symbols for each hypothesis are correlated, and a metric is derived based on the correlation results. For both schemes, the frequency bin error and/or the pilot offset are determined based on the metrics for all hypotheses evaluated.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: March 6, 2012
    Assignee: Qualcomm Incorporated
    Inventors: Shimman Patel, Kuei-Chiang Lai, Seguei A. Glazko
  • Patent number: 8090379
    Abstract: A communication system providing wireless communication among wireless users through a number of cellular base stations, each including at least transport management equipment and broadband equipment, at least one of which supports at least remote cellular station including RF equipment for communication with users of cellular devices. The system includes at lease one wireless narrow beam communication link operating at millimeter wave frequencies in excess of 60 GHz connecting a remote cellular station with a cellular base station equipped with broad band conversion electronic equipment and transport management equipment. In preferred embodiment the communication system includes a large number of remote cellular stations with each remote cellular station serving a separate communication cell.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: January 3, 2012
    Assignee: Trex Enterprises Corp
    Inventors: Thomas Lambert, Paul Johnson, Eric Korevaar, Eduardo Tinoco
  • Patent number: 8090411
    Abstract: A lens-based millimeter wave transceiver for use in wireless communication systems operating in the E-band spectrum consistent with the FCC rules regulating the 71-76 GHz and 81-86 GHz bands. The transceiver includes a single lens adapted for transmission of millimeter radiation to form communication beams in one band of either a band of about 71-76 GHz or a band of 81-86 GHz and for collection and focusing of millimeter wave radiation from communication beams in the other of the two bands. It includes a feed horn adapted to broadcast millimeter radiation through said single lens and to collect incoming millimeter wave radiation collected and focused by said single lens. A millimeter wave diplexer separates incoming and outgoing millimeter wave radiation.
    Type: Grant
    Filed: December 24, 2007
    Date of Patent: January 3, 2012
    Assignee: Trex Enterprises Corp
    Inventors: Eric Korevaar, Eduardo Tinoco, Richard Chedester, Vladimar Kolinko
  • Patent number: 8010058
    Abstract: A system and method for communications between a plurality of shipping containers and a central monitoring station using a meteor burst communication method is provided. The system may also be used as a redundancy scheme as a backup communications device for a primary satellite or cellular channel. The channel also uses an error protection protocol, and proposes a method to conserve battery power for the system.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: August 30, 2011
    Assignee: System Planning Corporation
    Inventors: Richard C. Meyers, Roy Smith
  • Patent number: 7941169
    Abstract: Provided are an automatic network configuration apparatus and method between short-range wireless terminals. The apparatus includes a storing unit for storing a threshold range value for determining adjacency with an adjacent wireless terminal, a wireless environment compensation constant in a present wireless environment, and a network configuration parameter for automatic network configuration; a signal strength measuring unit for periodically measuring strength of the wireless signal transmitted from the adjacent wireless terminal; a range calculating unit for calculating a range from another wireless terminal corresponding to the strength of the wireless signal measured in the signal strength measuring unit based on the wireless environment compensation constant in the pre-stored present wireless environment; and a network configuring unit for performing network configuration with the adjacent wireless terminal when the calculated range is within a threshold for determining adjacency.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: May 10, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ji-Yeon Son, Jun-Seok Park, Il-Sik Yang, Myunggyu Kim
  • Patent number: 7937111
    Abstract: A wireless base station apparatus (100) used in a wireless communications system includes a statistical processing unit (140) that performs statistical processing on downlink radio quality information reported from a wireless communications terminal device; a radio quality information offsetting unit (160) that adjusts the statistically processed downlink radio quality information based on a downlink transmission confirmation (ACK/NACK/DTX) message transmitted from the wireless communications terminal device and a required downlink quality; a transport format determination unit (170) that determines a downlink transport format based on the statistically processed radio quality information or the offset-adjusted radio quality information; and a transmitting unit (111) that transmits a downlink channel with the determined downlink transport format.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: May 3, 2011
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Ishii, Masafumi Usuda, Yoshimasa Imamura, Akihito Hanaki
  • Patent number: 7912506
    Abstract: A communication system providing wireless communication among wireless users through a number of cellular base stations. At least one of the base stations is a mobile base station in which low and high speed wireless transceivers are mounted on a temporarily stationary mobile vehicle such as a truck trailer or a truck. The system includes at least one connecting station with a millimeter wave wireless transceiver in communication with a fiber optic or high-speed cable communication network. The transceiver is adapted to communicate at millimeter wave frequencies higher than 60 GHz with another millimeter wave transceiver at one of the cellular base stations. Each of the base stations serves a separate communication cell.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: March 22, 2011
    Assignee: Trex Enterprises Corp
    Inventors: John A Lovberg, Paul A Johnson, Eric Korevaar
  • Patent number: 7876851
    Abstract: An apparatus and method for controlling amount of information to be fed back in a multiple antenna system in a multi-user environment. The apparatus includes a channel estimator which estimates channel values by using an input signal; a Singular Value Decomposition (SVD) operator which decomposes singular values from the estimated channel values; and a feedback determining unit which uses the singular values to compute channel capacity that can be obtained according to the amount of channel information to be fed back, and selects the channel information to be fed back by using the channel capacity.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: January 25, 2011
    Assignees: Samsung Electronics Co., Ltd, Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Hak-Ju Lee, Sung-Kwon Hong, Dong-Seek Park, Daesik Hong, Sungtae Kim
  • Patent number: 7877108
    Abstract: The present invention relates to a method for balancing the distribution of interference between radio cells in a wireless communication system comprising cells in which subcarrier blocks are used for communication. A number of adjacent cells build a cell cluster. Moreover, the present invention relates to a corresponding method adapted for use in a system in which multi beam antennas or multiple antennas are used. Furthermore, the present invention relates to base stations performing the above method as well as a communication system comprising the base stations.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: January 25, 2011
    Assignee: Panasonic Corporation
    Inventors: Christian Wengerter, Alexander Golitschek Edler Von Elbwart
  • Patent number: 7860199
    Abstract: Aspects of a method and system for a single antenna receiver system for HSDPA are provided. Aspects of a method for processing RF signals, the method may comprise computing channel estimates based on a plurality of received individual distinct path signals, generating timing reference signals indicating a location of at least one of the plurality of received individual distinct path signals, combining at least a portion of the plurality of received individual distinct path signals as a signal cluster based on at least one of the computed channel estimates and said generated timing reference signals, and selecting at least one of combining and equalization processing based on at least one of the computed channel estimates and the generated timing reference signals. Aspects of a system for processing RF signals may comprise circuitry that selects at least one of combining and equalization processing based the computed channel estimates and/or generated timing reference signals.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: December 28, 2010
    Assignee: Broadcom Corporation
    Inventors: Mark Kent, Vinko Erceg, Uri M. Landau, Pieter van Rooyen
  • Patent number: 7822441
    Abstract: An access point 10 providing a wireless LAN connection to a terminal device, for the purpose of connecting the terminal device to a WAN, the access point 10 includes: antenna units 210 and 310a-d that send and/or receive a radio frequency signal used for exchanging information via the wireless LAN; signal conversion units 220, 230, 240, 320a-d, 330a-d and 340a-d that perform conversion between the radio frequency signal and a digital signal as the information; an information processing unit 110 that executes processing of the digital signal based on a communication protocol for exchanging of the information; antenna cases 200 and 300a-d that contain the antenna units and the signal conversion units; a main unit case 100 that, separated from the antenna cases, contains the information processing unit; and a wired cables 250 and 350a-d that, connecting the antenna cases and the main unit case, performs transmission the digital signal between the signal conversion units and the information processing unit.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: October 26, 2010
    Assignee: Buffalo Inc.
    Inventor: Takashi Ishidoshiro
  • Patent number: 7769347
    Abstract: A communication system providing wireless communication among wireless users through a number of cellular base stations. The system includes a connecting station with a millimeter wave wireless transceiver in communication with a fiber optic or high-speed cable communication network. The transceiver is adapted to communicate at millimeter wave frequencies higher than 60 GHz with another millimeter wave transceiver at one of the cellular base stations. Each of the base stations serves a separate communication cell. Each base station is equipped with a low frequency wireless transceiver for communicating with the wireless users within the cell at a radio frequency lower than 6 GHz. In preferred embodiments the system a part of a telephone system, an Internet system or a computer network.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: August 3, 2010
    Assignee: Trex Enterprises Corp.
    Inventors: John A Louberg, Paul A Johnson, Eric Korevaar
  • Patent number: 7693097
    Abstract: The present invention provides a method that is implemented in a base station. The method includes predicting a transmission rate adaptation associated with a mobile unit during a first time interval. The prediction is based on a signal-to-noise ratio for transmission associated with the mobile unit in the first time interval. The predicted request is for a transmission rate adaptation that is predicted to occur during a second time interval subsequent to the first time interval. The method also includes performing a system reconfiguration or a resource reallocation for communication between the base station and the mobile unit at the predicted transmission rate during the second time interval. The system reconfiguration or the resource reallocation is performed prior to the second time interval.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: April 6, 2010
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Geert Jan Hoekstra, Franciscus Panken
  • Patent number: 7640040
    Abstract: A mobile communication device comprises a plurality of spatially and/or polar diverse antenna configurations. Signals received by each of the plurality of antenna configurations are combined in a combiner and passed to a rake receiver that can be configured to combine the signals received by each of the plurality of antenna configurations for further processing. The mobile communication device can comprises a signal adjusting network that can be configured to adjust the phase and/or magnitude of signals being received by one of the antennas.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: December 29, 2009
    Assignee: Kyocera Corporation
    Inventors: Gregory Poilasne, Richard J. Camarillo
  • Patent number: 7634284
    Abstract: A technique for enhancing the signal-to-noise performance of a digital communication link without affecting its power flux density. An information data stream has its original signaling rate selectively reduced prior to transmission, to enhance signal-to-noise performance. Then the reduced signaling rate information signal is combined with a pseudorandom data sequence at the original signaling rate, to provide a randomized data sequence to be transmitted at the original signaling rate, thereby maintaining power flux density levels below those permitted by regulatory limits.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: December 15, 2009
    Assignee: Northrop Grumman Corporation
    Inventors: Harvey L. Berger, Stuart T. Linsky
  • Publication number: 20090252085
    Abstract: A wireless communication system includes an access point and first and second stations. The first station transmits a first message that includes an address of a second station as a destination address and an address of the first station as a source address. The access point forwards the message including the address of the second station address as the destination address and the address of the first station as the source address. The second station receives the message from the first station during a first time interval and receives the first message from the access point during a second time interval. The second station processes the duplicate received message to produce inbound data.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Applicant: Broadcom Corporation
    Inventor: Jason A. Trachewsky
  • Patent number: 7505539
    Abstract: Aspects of a method and system for a single antenna receiver system for HSDPA are provided. Aspects of a method for processing RF signals, the method may comprise computing channel estimates based on a plurality of received individual distinct path signals, generating timing reference signals indicating a location of at least one of the plurality of received individual distinct path signals, combining at least a portion of the plurality of received individual distinct path signals as a signal cluster based on at least one of the computed channel estimates and said generated timing reference signals, and selecting at least one of combining and equalization processing based on at least one of the computed channel estimates and the generated timing reference signals. Aspects of a system for processing RF signals may comprise circuitry that selects at least one of combining and equalization processing based the computed channel estimates and/or generated timing reference signals.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: March 17, 2009
    Assignee: Broadcom Corporation
    Inventors: Mark Kent, Vinko Erceg, Uri M. Landau, Pieter Van Rooyen
  • Patent number: 7444169
    Abstract: A wireless base station apparatus (100) used in a wireless communications system includes a statistical processing unit (140) that performs statistical processing on downlink radio quality information reported from a wireless communications terminal device; a radio quality information offsetting unit (160) that adjusts the statistically processed downlink radio quality information based on a downlink transmission confirmation (ACK/NACK/DTX) message transmitted from the wireless communications terminal device and a required downlink quality; a transport format determination unit (170) that determines a downlink transport format based on the statistically processed radio quality information or the offset-adjusted radio quality information; and a transmitting unit (111) that transmits a downlink channel with the determined downlink transport format.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: October 28, 2008
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Ishii, Masafumi Usuda, Yoshimasa Imamura, Akihito Hanaki
  • Patent number: 7400909
    Abstract: A mobile communication apparatus is provided, which permits highly efficient communication even between mobile units that cannot communicate directly because of signal-shielding communication obstacles. The mobile communication apparatus 10 includes transmission means 11, reception means 11, surrounding environment detection means 13, 14 for detecting whether or not there are communication obstacles in the surroundings of a mobile unit, communication state decision means 15 for making decisions as to the quality of the communication state of the mobile unit based on detection results of the surrounding environment detection means 13, 14, and control means 16 for controlling transmission, via the transmission means 11, of information received by the reception means 11 based on decision results of the communication state decision means 15.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: July 15, 2008
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yoshichika Konishi, Eiji Niwa
  • Patent number: 7143320
    Abstract: A method for increasing data throughput on a wireless local area network in the presence of intermittent interference. The method of one embodiment comprises receiving a data packet through a wireless channel. Quality of the wireless channel is evaluated. A packet error ratio (PER) value is calculated for the data packet. The PER value is checked as to whether it is within an acceptable level. A determination is made as to whether an intermittent noise is affecting the PER value.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: November 28, 2006
    Assignee: Intel Corporation
    Inventor: Robert D. Cavin
  • Patent number: 7047029
    Abstract: A method, apparatus, article of manufacture, and a computer memory structure adaptively controlling a transmission signal from a satellite to at least one terrestrial receiver in a terrestrial region is disclosed. The method comprises the steps of receiving information describing a deleterious time-varying propagation characteristic of the transmission signal to the terrestrial region; generating the transmission signal having a transmission characteristic which mitigates the undesirable aspects of the time-varying propagation characteristic; and transmitting the generated transmission signal from the satellite to the terrestrial receiver. The article of manufacture comprises a controller device tangibly embodying instructions to perform the method steps described above.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: May 16, 2006
    Assignee: The DirecTV Group, Inc.
    Inventors: John P. Godwin, Patrick J. Loner, Jim C. Williams
  • Patent number: 6985458
    Abstract: The throughput between a satellite and a plurality of users is controlled by adjusting resources among the users depending on the signal degradation (such as rain fade) experienced by the users. A plurality of time division multiplex (TDM) channels (also called bands) each have a plurality of TDM subchannels corresponding to the users. The channels have different signal fade ranges and the users are assigned to channels based on their signal degradations. Users with signal degradations within a range of each other are assigned to different subchannels within a common channel. Those users with downlinks having substantial signal degradation are given a greater packet length or duration for the data packets of their corresponding subchannels. Additionally, the forward error correction (FEC) code rate is adjusted depending on signal degradation. If some downlinks are experiencing extreme signal degradation, their packet lengths can be reduced to zero and the length (i.e.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: January 10, 2006
    Assignee: RKF Engineering, LLC
    Inventors: Jeffery B. Freedman, Ted M. Kaplan
  • Patent number: 6954618
    Abstract: First estimations of the fading coefficients of a multi-path transmission channel are carried out in the sense of maximum likelihood. Sets of Wiener filter coefficients are stored according to predetermined speeds of movement of the mobile terminal and predetermined power levels of the signal. The real speed of the mobile terminal is estimated and the power of the signal for each path is measured. From this, a set of Wiener filter coefficients is derived with which the first estimations are filtered to obtain the final estimation of the fading coefficients.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: October 11, 2005
    Assignee: STMicroelectronics N.V.
    Inventor: Corinne Bonhomme
  • Patent number: 6944477
    Abstract: The invention relates to a method of selecting a signal among N signals, according to which method a validation signal associated with a signal to be selected is placed in an active state by means of a selection signal. The method according to the invention includes an attribution to each of the validation signals of the state of its associated selection signal when all the validation signals are in an inactive state. The invention enables to preserve the integrity of the duty cycle of the signal resulting from the selection thus carried out.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: September 13, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Patrick Digabel
  • Patent number: 6920333
    Abstract: A receiver in a communication system, for combining various significant components of a multipath fading signal and eliminating all other small components, consists of a signal generator, a plurality of delay devices, a plurality of decision feedback equalizers with embedded coherent signal combiners, a controller, a coherent signal combiner, and a decision circuit. The first decision feedback equalizer receives its inputs signals from a delay device and a signal generator, and each of the rest decision feedback equalizer receives its input signals from a corresponding delay device and the signal generator of its previous decision feedback equalizer. The coherent signal combiner, coupled to the output of the summation circuit of the last decision feedback equalizer, combines all the significant component signals together. The decision circuit makes a decision on transmitted symbol from the output signal of the coherent signal combiner.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: July 19, 2005
    Inventor: George L. Yang
  • Patent number: 6862451
    Abstract: The invention concerns a cellular radio telephone signal comprising a symmetrical two-way main channel, including a main uplink and a main downlink, in particular transmitting low or medium speed data and signaling and control data, and comprising at least one additional channel solely assigned to the downlink, transmitting in particular, high speed data transmission. At one given time, all or part of said supplementary channel transmission capacity can be dynamically allocated to a particular mobile station. Information for retrieving data intended for a particular mobile station and carried by said supplementary channel can be transmitted among said main downlink signaling and control data.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: March 1, 2005
    Assignee: Wavecom
    Inventor: Michel Alard
  • Publication number: 20040203829
    Abstract: A communication mode determination section 201 determines the communication mode based on the CIR measured by a CIR measurement section 219; a DRC signal creation section 202 creates a DRC signal with a number corresponding to the communication mode; and a DRC power controller 205 refers to a transmission power table 206 showing the correspondence between DRC numbers and transmission power, and, based on the transmission power of the pilot signal output from a pilot power controller 209, increases transmission power in proportion as the DRC signal indicates that downlink channel quality is good.
    Type: Application
    Filed: December 18, 2002
    Publication date: October 14, 2004
    Inventors: Kenichi Miyoshi, Osamu Kato, Junichi Aizawa
  • Publication number: 20040192361
    Abstract: A communications system includes a transmission system and a receiver system for enabling telecommunication of a voice signal on an appropriate carrier wave across a medium at a low bit-rate and consequently, with high reliability.
    Type: Application
    Filed: March 31, 2003
    Publication date: September 30, 2004
    Applicant: Tadiran Communications Ltd.
    Inventors: Yossi Yossef, Rafi Hana, Yehuda Eder
  • Publication number: 20040192196
    Abstract: A device for generating a reference value that represents a clear sky condition includes a receiver that receives beacon signals transmitted from a satellite. The device also includes logic that estimates carrier-to-noise levels associated with the beacon signals and uses the estimated carrier-to-noise levels to identify non-clear sky conditions. The logic also calculates the clear sky reference value using a portion of the estimated carrier-to-noise values, where the portion that is used excludes the estimated carrier-to-noise values taken during non-clear sky conditions.
    Type: Application
    Filed: March 27, 2003
    Publication date: September 30, 2004
    Inventors: In-Kyung Kim, Russell Fang, Nate Schley
  • Patent number: 6714761
    Abstract: A meteor burst communication system (10) has the capability of simultaneously communicating with multiple remote units (14). The meteor burst system includes a base station (12) having a processing unit, or main processor (16), that generates a probe signal (76). A transmitter (54, 56, 58) transmits the probe signal to the remote units. The remote units receive the probe signal and respond to the probe signal by transmitting data signals (78, 80, 82) to the base station. The base station includes a plurality of receivers (38, 40, 42, 44) that receive the data signals from the remote units. A plurality of receiver processors (46, 48, 50, 52) process the data signals received from the remote units. When the data signals have been received from the remote units, the main processor formulates an acknowledgment signal (84), and the acknowledgment signal is transmitted to the remote units.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: March 30, 2004
    Assignee: StarCom Wireless, Inc.
    Inventor: Fred L. Anderson, III
  • Patent number: 6665546
    Abstract: A point-to-point, wireless, millimeter wave trunk line communications link at high data rates in excess of 1 Gbps and at ranges of several miles during normal weather conditions. This link is combined with an Ethernet network to provide high speed digital data communication among a large number of users. In a preferred embodiment a trunk line communication link operates within the 92 to 95 GHz portion of the millimeter spectrum. A first transceiver transmits at a first bandwidth and receives at a second bandwidth both within the above spectral range. A second transceiver transmits at the second bandwidth and receives at the first bandwidth. The transceivers are equipped with antennas providing beam divergence small enough to ensure efficient spatial and directional partitioning of the data channels so that an almost unlimited number of transceivers will be able to simultaneously use the same spectrum.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: December 16, 2003
    Assignee: Trex Enterprises Corporation
    Inventors: Louis Slaughter, Jon Hill, Thomas Lambert, Huan Nguyen, Randall Olsen, John Lovberg, Kenneth Y. Tang, Vladimir Kolinko
  • Patent number: 6643519
    Abstract: Automatic control of the power of the transmitters (161 and 162) of a near-end-far-end transceiver pair (121-141) is achieved by first determining whether the strength of the signals received at near-end and far-end receivers (181 and 182) of the near-end-far-end transceiver pair are simultaneously attenuated a prescribed value below received signal strength values measured during clear weather free-space conditions. If the received signal strengths are so attenuated, then transmission power of the near-end and far-end transceivers is increased by predetermined increments (or sequences or increments) to restore, but not exceed the strengths of the received signals to their respective signal strength values measured during clear weather free-space conditions. Conversely, if the above received signal strengths are determined not to be simultaneously attenuated by the said prescribed value, when one near-end or far-end received signal only is determined to be degraded (e.g.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: November 4, 2003
    Assignee: AT&T Corp.
    Inventor: Carl W Lundgren
  • Patent number: 6611696
    Abstract: An apparatus and method for aligning the antennas of two transceivers of a point-to-point wireless millimeter wave communications link. A narrow band oscillator power source is substituted for the signal transmitting electronics associated with a first antenna and a power detector is substituted for the signal receiving electronics associated with a second antenna. In preferred embodiments after a first alignment procedure is performed, the procedure is repeated with an oscillator power source connected to the second antenna and a power detector connected to the first antenna. In other preferred embodiments the antennas are pre-aligned using a signaling mirror or a narrow beam search light or laser. After the antennas are aligned the transceiver electronics are reconnected. In preferred embodiments the communication link operates within the 92 to 95 GHz portion of the millimeter spectrum and provides data transmission rates in excess of 155 Mbps.
    Type: Grant
    Filed: January 5, 2002
    Date of Patent: August 26, 2003
    Assignee: Trex Enterprises Corporation
    Inventors: Richard Chedester, Paul Johnson, Thomas Lambert, Randall B. Olsen, John Lovberg, Kenneth Y. Tang, Vladimir Kolinko, George Houghton
  • Patent number: 6587442
    Abstract: A method for efficient power control in a (CDMA based) fixed wireless system. The method comprises the steps of (1) monitoring a transmission link of the fixed wireless system for an occurrence of a fade, (2) recording a number of power increases to the transmission link due to said fade, and (3) reducing the power to an appropriate level when said fade is over. The adjusting step includes the steps of determining an appropriate power-down step size, which results in saving power, wherein the step size is influenced by a frame error rate (FER) and selected to maintain a desired FER, and dynamically decreasing the power by the appropriate power-down step size, thereby conserving power and increasing system capacity.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: July 1, 2003
    Assignee: Nortel Networks Limited
    Inventor: Nishith D. Tripathi