With Synchronizing Of Satellites Or System Patents (Class 455/13.2)
  • Patent number: 10390351
    Abstract: A method for allocating radio resources for setting up satellite communications in a first communication system comprising a constellation of non-GSO satellites and a first set of terminals, the method comprises the following steps, for each terminal of the first set: determining a distinct separation angle threshold to be observed with respect to a constellation of geostationary satellites, a separation angle being defined as the smallest topocentric angle by which a given non-GSO satellite and any geostationary satellite of the geostationary arc are seen from a given terminal of the first set, authorizing the terminal to set up a communication link with a non-GSO satellite if the separation angle associated with the link is greater than or equal to the separation angle threshold.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: August 20, 2019
    Assignee: THALES
    Inventors: Zakariya Faraj, Nicolas Chuberre
  • Patent number: 10349401
    Abstract: In one aspect of the teachings herein, a transmitter uses a burst numbering scheme to dynamically number the transmit slots comprising a burst transmission on a secondary carrier operated in unlicensed spectrum, where the secondary carrier is time aligned with a primary carrier that operates in licensed spectrum and uses a fixed numbering scheme for its transmit slots. By assigning the transmit slot numbers dynamically, the transmitter has foreknowledge of the transmit slot numbers of the transmit slots within the transmit burst, and can therefore carry out processing that is dependent on the transmit slot number(s) assigned to the transmit slots comprising the burst, even when the burst start time is variable. Correspondingly, a receiver also has foreknowledge of the transmit slot numbers associated with a received burst that was dynamically numbered by a transmitter according to a burst numbering scheme known to the receiver.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: July 9, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jung-Fu Cheng, Sorour Falahati, Havish Koorapaty, Daniel Larsson, Amitav Mukherjee
  • Patent number: 10251148
    Abstract: A method for locating a terminal equipped with a UICC card, connected to a cellular telecommunications network and located in a current cell, the terminal storing in the UICC card an identifier of the current cell and at least one identifier of a previous cell in which the terminal was previously located. This method comprises the following steps, implemented by a processing server connected to the network: receiving said identifiers received from the terminal via the communication network; estimating location information for the terminal using location coordinates associated with at least one previous cell identified by an identifier stored in the terminal.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: April 2, 2019
    Assignee: Orange
    Inventors: Yann Collet, Stephane Bandin
  • Patent number: 9948105
    Abstract: Disclosed embodiments relate to a data control system. In some embodiments, the data control system includes a transmission module configured to add synchronization signal information to data included in a first data stream to generate a second data stream, and a plurality of control modules configured to receive the second data stream from the transmission module. In some embodiments, the data includes power information.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: April 17, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Seung Hun Lee, Jong Bae Kim
  • Patent number: 9859973
    Abstract: Satellite telecommunications system comprises a transmitting/receiving surface terminal associated with a user substantially on a surface of the Earth, a geostationary satellite configured to receive/transmit signals from/to a predefined coverage area with a line of sight to the geostationary satellite, and a traveling satellite moving above the surface of the Earth. The traveling satellite repeats signals received from the surface terminal towards the geostationary satellite and/or repeat signals received from the geostationary satellite towards the surface terminal. The same frequency band is used to communicate between the surface terminal and the traveling satellite and between the traveling satellite and the geostationary satellite. The tracking/telemetry and command signals of the traveling satellite are relayed by the geostationary satellite.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: January 2, 2018
    Inventor: Jérôme Tronc
  • Patent number: 9768814
    Abstract: An apparatus and method is disclosed with embodiments of a: 1. digital to analog and reference time converter; 2. analog and reference time to digital converter; 3. Sheahan non-linear time-varying, analog and digital control system; and 4. Sheahan Communication Channel are described in detail herein. Some embodiments use time stamp having 72 bits of time data sufficient to identify each clock pulse of a 9.192631770 GHz clock signal plus an additional 8 bits representing 28=256 interpolated clock phases in order reach a resolution of approximately 0.425 picoseconds per clock phase. Thus an 80 bit time stamp is generated and used as described herein.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: September 19, 2017
    Inventor: Benjamin J. Sheahan
  • Patent number: 9705634
    Abstract: The system of the present invention allows a user to select one or multiple SATCOM radio and antenna equipment types, select their current location(s) or a route and select the UHF SATCOM satellite for a multi-user communication network or architecture. The system presents an assessment of the level of performance of the selected system equipment and provides a capability to assess the impact of degrading factors, such as man-made interference (jamming) and natural phenomena (e.g. rain, clouds, ionospheric scintillation). This predictive assessment is a tailored result showing the phenomenology effects. Natural phenomenology like ionospheric scintillation, clouds, and precipitation, plus man-made phenomenologies like SATCOM jammers need to be differentiated by behavior characteristics and performance on a SATCOM frequency. If the system assessment determines the communication link is weak or ineffective based off the user's inputs, the application provides the ability to select alternative configurations, e.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: July 11, 2017
    Assignee: Applied Research Associates, Inc.
    Inventor: Laura Macy Lim
  • Patent number: 9538538
    Abstract: A method and apparatus for a non-geosynchronous orbit (NGSO) satellite to comply with equivalent power flux density (EPFD) limits are disclosed. The example implementations may allow a constellation of NGSO satellites to comply with EPFD limits without disabling beams transmitted from the NGSO satellites. The power level of one or more beams to be transmitted from the NGSO satellites may be dynamically adjusted according to a beam power back-off schedule. In some aspects, the beam power back-off schedule may specify beam power back-off values as a function of latitude on Earth, and may allow for maximum allowable power levels for beams transmitted from the NGSO satellites without violating any of the EPFD percentile limits.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: January 3, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Dan Zhang, Mehmet Izzet Gurelli, Sumeeth Nagaraja, Dan Vassilovski, James Taylor Determan, Gene Wesley Marsh, Qiang Wu
  • Patent number: 9405944
    Abstract: A system may include at least one antenna and a controller in communication with the antenna. The controller may be configured to establish a pattern for transmitting low frequency challenges; and instruct the first antenna to transmit the low frequency challenges based on the established pattern.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: August 2, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: John Robert Van Wiemeersch, Kevin Thomas Hille
  • Patent number: 9407357
    Abstract: A radio node for updating a local timing parameter based on a message from a remote node includes a processing circuit and receiver. The receiver is configured to receive the message and to provide the message to the processing circuit. The processing circuit is configured to determine an expected time of arrival for the received message using an estimation of range between the radio node and the remote node. The processing circuit is further configured to obtain an estimate of a timing error for the radio node by comparing the expected time of arrival with the actual time of arrival. The processing circuit is further configured to determine a timing error quality using position uncertainty information and time uncertainty information received from the remote node with the received message.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: August 2, 2016
    Assignee: Rockwell Collins, Inc.
    Inventors: Brian R. Roggendorf, Steven P. Phillips, Jason D. Block
  • Patent number: 9143584
    Abstract: Embodiments of the present invention relate to a message synchronization method, apparatus and system. The method includes: obtaining a first sending time stamp transmitted on a main link and a second sending time stamp transmitted on a backup link respectively; calculating to obtain a time difference according to the first sending time stamp and the second sending time stamp; adding bytes to the first message transmitted on the main link and the first message transmitted on the backup link, and form second messages to be transmitted on the main link and the backup link respectively; and sending the second messages to a receiving end on the main link and the backup link respectively.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: September 22, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bing Jiang, Yihua Zhang, Kai Qi
  • Patent number: 9131437
    Abstract: A PLL circuit of a wireless base station receives a reference signal for synchronization, transmitted from a GPS unit to generate a synchronizing signal in synchronization with the reference signal. A GPS state management unit transmits state information representing a state of the GPS unit to an EMS as the state information of a device supplying a reference signal, mounted on its own device, according to SNMP that is a standard management protocol.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: September 8, 2015
    Inventor: Yukie Sumikawa
  • Patent number: 9048989
    Abstract: Using an allocated control channel resource in a relay transmission frame, with an identified starting point, in a semi-static allocation scheme is disclosed. The control signaling may be mapped to the allocated control channel resource using different mapping schemes. Also disclosed is decoding a control channel element from a relay transmission frame received via a wireless relay link. The control channel resource associated with the relay transmission frame may be allocated in a semi-static allocation scheme. A starting indicator may be extracted from the decoded control channel element. A part of control signaling may be extracted from the decoded control channel element using the extracted starting indicator.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: June 2, 2015
    Inventors: Erlin Zeng, Haiming Wang, Xiangguang Che, Chungyan Gao, Peng Chen, Jing Han, Bernhard Raaf
  • Patent number: 9001642
    Abstract: A method and apparatus for a satellite system. A satellite system is comprised of a communications system in a satellite and a number of computers associated with the satellite. The communications system is configured to receive first information and transmit second information from the satellite to a remote platform over a number of communications links. The number of computers is configured to identify a block of information for encryption from instructions in the first information. The number of computers is further configured to generate a key from a portion of the block of information based on the instructions. The number of computers is further configured to perform an exclusive OR operation on the block of information using the key to form a block of encrypted information. The number of computers is further configured to transmit the block of encrypted information.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: April 7, 2015
    Assignee: The Boeing Company
    Inventors: Duane L. Blanchard, Angelia Mae Corbett
  • Patent number: 8989652
    Abstract: A system, method, and apparatus for advanced timing and time transfer for satellite constellations using crosslink ranging and an accurate time source are disclosed herein. In particular, the present disclosure relates generally to systems for providing improved positioning, navigation, and/or timing information for oscillator calibration and more specifically, to use at least one satellite with accessibility to an accurate time source to calibrate the local oscillator on a crosslink paired satellite. In at least, one embodiment, time synchronization on a subset of satellites with crosslinking capabilities is used to distribute time through a network of crosslinked satellites.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: March 24, 2015
    Assignee: The Boeing Company
    Inventors: David A. Whelan, Gregory M. Gutt, Peter M. Fyfe
  • Patent number: 8982282
    Abstract: A display apparatus and a method of searching for a channel in the display apparatus includes a plurality of tuners and a plurality of antenna ports respectively connected to the plurality of tuners. The method includes receiving a channel search command; if the channel search command is input, searching for one of the plurality of antenna ports that is connected to a satellite antenna to receive a broadcasting signal, if one of the plurality of antenna ports is connected to the satellite antenna to receive the broadcasting signal, setting one of the plurality of tuners connected to the one antenna port, to a main tuner, and performing a channel search through the tuner set to the main tuner. Therefore, although an antenna port connected to one of the plurality of tuners initially set to a sub tuner, the display apparatus performs a channel search through the corresponding tuner.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: March 17, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jun-hee Woo
  • Patent number: 8977191
    Abstract: An approach facilitates synchronization by providing: (i) a method to analyze the two-satellite synchronization problem in time-frequency domain; and (ii) a two-stage estimation method to accomplish timing and frequency synchronization. The embodiment facilitates satellite diversity. The embodiment applies to a system involving two or more geosynchronous satellites.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: March 10, 2015
    Assignee: Hughes Network Systems, LLC
    Inventors: Je-Hong Jong, Jun Xu, Anthony Noerpel, Chanasandra Ravishankar
  • Patent number: 8971797
    Abstract: The subject matter disclosed herein relates to a system and method for acquiring signal received from satellite vehicles (SVs) in a satellite navigation system. In one example, although claimed subject matter is not so limited, information processed in acquiring a signal from a first SV may be used in acquiring a signal from a second SV.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: March 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Leonid Sheynblat, Ardalan Heshmati, Arnold Jason Gum
  • Patent number: 8971236
    Abstract: System and a method for timely interconnecting elements of a wide spread remote measurement, monitoring or data collection system through multiplexing in a satellite system. The invention provides multiplexing features of a satellite system using on-board processing features to gather data from a plurality of remote monitoring stations (4) on any global navigation reference time and multiplex them into a single stream towards one or more computation centers. Each of said computation centers (3) has a down-link adapter (7) capable of extracting a channel from a down-link transmission of a satellite. The data from each of said remote monitoring stations (4) is also passed through an up-link adapter (5) so as to make it suitable for uplink transmission towards a DDBS satellite. Up-link and down-link adapters can be interconnected together to enable loop-back of information such as timing data to monitor transit times.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: March 3, 2015
    Assignee: Alcatel Lucent
    Inventors: Etienne Dunas, Philippe Roghi
  • Patent number: 8958789
    Abstract: An optical medium, such as fiber, is tapped to provide an antenna port wherever radio service coverage is desired. Each antenna port is a bi-directional remote unit that receives a digital optical signal from a host unit and transforms the signal to a radio frequency signal for transmission by the remote unit. The remote unit receives radio frequency signals that are converted to digital signals and summed with signals from other remote units and converted to an optical signal for transmission to the host unit.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: February 17, 2015
    Assignee: ADC Telecommunications, Inc.
    Inventors: Donald R. Bauman, Philip M. Wala, Jeffrey O. Brennan
  • Patent number: 8954060
    Abstract: A system provides GSM service over distributed mobile networks. A Network Area Controller (NAC) allows Global Titles (GT) and Mobile Station Roaming Numbers (MSRN) of the GSM network to be shared within a private GSM network. A processor within the Mobile Switching Center (MSC) of a mobile network transcodes voice data and maps the data to the proper bearer QoS to allow the use of Mobile Satellite Services (MSS) such as Iridium and Inmarsat.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: February 10, 2015
    Assignee: Globe Wireless LLC
    Inventors: Mark L. Witsaman, Darryn Trowell
  • Patent number: 8897097
    Abstract: A satellite signal reception device that can desirably receive satellite signals has a charge state detection circuit 43 and a voltage detection circuit 44 that detect if the satellite signal reception device is outdoors, and a control circuit 40. If the satellite signal reception device is determined to be outdoors based on the detection result from the charge state detection circuit 43 and voltage detection circuit 44, the control circuit 40 operates a GPS reception circuit 30. If an indoor state in which the satellite signal reception device is determined to not be outdoors continues for at least a predetermined specific time, the control circuit 40 operates the GPS reception circuit 30 at a preset scheduled reception time.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: November 25, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Norimitsu Baba, Katsuyuki Honda, Toshikazu Akiyama, Jun Matsuzaki
  • Patent number: 8867983
    Abstract: A method of controlling a relay station in a cell of a multi-hop relay network in accordance with a one-way propagation delay between a base station in the cell and the relay station. A relay station in a cell of a multi-hop relay network including means for controlling the signal flow between the relay station and the various other stations in the cell in accordance with a one-way propagation delay between a base station in the cell and the relay station.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: October 21, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Chenxi Zhu, Michiharu Nakamura, Dorin Viorel
  • Publication number: 20140273815
    Abstract: A customer satellite terminal provides seamless hand-off from a descending satellite to an ascending satellite in an equatorial MEO constellation at RF. The hand-off from the descending satellite to the ascending satellite is conducted when the propagation delay from the ascending satellite and the descending satellite are equal, by aligning first and second amplitudes, first and second frequency offsets, and first and second phases.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: EMC SatCom Technologies, LLC
    Inventor: Sriram JAYASIMHA
  • Patent number: 8837333
    Abstract: The present invention relates to a satellite communication system for extending communications between a vehicle and a satellite in an area of non-visibility of the satellite. The satellite communication system comprises a fixed transceiver system and a mobile transceiver system. The fixed transceiver system includes a first antenna intended to be positioned outside the area of non-visibility of the satellite, and at least one second antenna coupled with the first antenna and intended to be positioned in the area of non-visibility of the satellite. The fixed transceiver system is configured to receive through the first antenna downlink signals transmitted by the satellite on at least one downlink carrier frequency and to transmit the received downlink signals on the at least one downlink carrier frequency in the area of non-visibility of the satellite through the at least one second antenna.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: September 16, 2014
    Assignee: Telespazio S.p.A.
    Inventors: Antonio Saitto, Damiano De Luca, Rosario Bono, Daniele D'Ambrosio
  • Patent number: 8837898
    Abstract: A method and apparatus for video playback includes coordinating a display of a video playback on a first device so as to be synchronized to a display of the video at a second device in response to the first device departing a control territory associated with the second device.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: September 16, 2014
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Ryan S. Davidson, Calvin H. Watson
  • Patent number: 8831506
    Abstract: A signal repeater includes a port, an amplifier, and an adaptive device. The port is configured to connect to an electrical line of an electrical grid between devices. Communication over the electrical line and between the devices includes transmission of a first signal. The port is configured to receive the first signal from the electrical line. An amplifier is configured to receive a second signal based on the first signal, and amplify the second signal. The port is configured to receive the amplified second signal, and provide the amplified second signal to the electrical line. An adaptive device is configured to, based on the first signal, adjust an output impedance of the signal repeater to match a first impedance of a load on the signal repeater. The first impedance is seen by the signal repeater at the port, and wherein the first impedance includes an impedance of the electrical line.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: September 9, 2014
    Assignee: Marvell Hispania, S.L.U.
    Inventors: Jorge Vicente Blasco Claret, Josa Luis Gonzalez Moreno, Jose Luis Camps Soriano, Antonio Pairet Molina
  • Patent number: 8830961
    Abstract: A mobile wireless system includes a first gateway (L-PGW), a second gateway (PGW), a first access point (HeNB) capable of establishing a communication path simultaneously with the first and second gateways, and a second access point (eNB) capable of establishing a communication path only with the PGW. When a mobile terminal connected to the HeNB and communicating with a communication destination node using a first path through the L-PGW switches a connection destination to the eNB, the HeNB establishes a second path through the HeNB and the PGW, while maintaining the first path. The HeNB transmits data, which has been transmitted to the HeNB along the first path, to the eNB along the second path, until the UE is connected to the eNB, and a third path to the communication destination node through the PGW is established. Accordingly, an interruption time of data reception involved in handover is shortened.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: September 9, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Takako Hori, Takeshi Kanazawa, Akito Fukui
  • Patent number: 8824957
    Abstract: Wireless terminal devices (TA) to (TH) each detects whether channel information received from each of repeaters (1111) to (111n) indicates an occupied state or an idle state, and when detecting a channel in an idle state, writes identification information of that channel in a RAM (23). The wireless terminal devices (TA) to (TH) each selects a piece of identification information of a channel among plural pieces of identification information of a channel written in the RAM (23) to start making a call to a channel of the selected identification information.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: September 2, 2014
    Assignee: Icom Incorporated
    Inventors: Shoji Fukuzawa, Yoshiyuki Tanaka
  • Patent number: 8811889
    Abstract: A method and apparatus for providing broadband signals to a portable user device is disclosed. Broadband signals, such as satellite radio signals, are received at a base station having a plurality of antennas. The content of the broadband signals are then encoded using space time coding (STC), and the STC encoded broadband content is transmitted from the plurality of antennas via a first wireless network protocol. The STC encoded broadband content can be received at a portable user device having a plurality of antennas or at a wireless access point having a plurality of antennas, which then transmit the broadband signals via a second wireless network protocol.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: August 19, 2014
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Joseph A. Alfred, Joseph M. Sommer
  • Publication number: 20140187144
    Abstract: An enhanced base station and clock synchronization method are provided. The method includes scanning to discover a satellite transmitting a satellite signal and a master base station providing clock synchronization signal, entering, when a satellite having a signal that fulfills predetermined conditions is found, a master mode for receiving the satellite signal to acquire clock synchronization and transmitting a clock synchronization signal to at least one slave base station, and entering, when no satellite having a signal that fulfills the predetermined conditions is found, a slave mode for receiving the clock synchronization signal from the master base station to acquire clock synchronization. The method allows the base station to switch between the master and slave modes dynamically according to variation of the communication environment, resulting in efficient clock synchronization.
    Type: Application
    Filed: March 4, 2014
    Publication date: July 3, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jai Jin LIM, Woo Jae KIM
  • Patent number: 8744494
    Abstract: A method is disclosed for establishing communication links in a satellite based wireless communication system. The method includes: establishing a forward link from the satellite to at least one of a plurality of subscriber wireless communication devices (WCDs) by use of a shared frequency multi-user communication protocol; applying an error correction code to use in the forward link, whereby the error correction applies to an aggregation of communications provided to multiple ones of the WCDs; and receiving communications in a return link signal by use of a protocol providing channels having dedicated frequency assignments and non-slotted channel assignment.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: June 3, 2014
    Assignee: Qualcomm Incorporated
    Inventor: Ahmad Jalali
  • Patent number: 8718546
    Abstract: A near-field communication (NFC) system may include a plurality of NFC devices each including an NFC circuit configured to wirelessly communicate using an NFC communications protocol, and a processor coupled to the NFC circuit. The processor may be configured to synchronize an internal timing signal to an external timing signal, cycle power to the NFC circuit to periodically switch the NFC circuit between a peer-to-peer recognition state and a low power state based upon the synchronized internal timing signal, and initiate peer-to-peer NFC communications with another one of the plurality of NFC devices when in range thereof and upon being switched to the peer-to-peer recognition state therewith.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: May 6, 2014
    Assignee: BlackBerry Limited
    Inventors: David Ryan Walker, Vahid Moosavi, Jason Tyler Griffin, Steven Henry Fyke
  • Patent number: 8712322
    Abstract: Methods and apparatus are disclosed to enable a fixed or a mobile ground based slave stations (VSAT: Very Small Aperture Terminal) in a communication network to receive TDM transmissions from and transmit TDMA burst transmissions to one or more ground-based gateway stations in a networking system that employs one or more geosynchronous satellites. Each gateway station transmits on one or more forward TDM channels to the slave stations; however, one primary gateway acts as the master station at any given time which transmits the network control messages to the slave stations (VSATs) that control their TDMA transmission behavior on the network.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: April 29, 2014
    Assignee: Emerging Markets Communications LLC
    Inventors: Emil Youssefzadeh, Richard Rebert Forberg, Hans Peter Lexow
  • Patent number: 8711836
    Abstract: Apparatus and methods relating to synchronization of communication equipment are disclosed. Synchronization information received from a bonded communication link can be used to synchronize local and/or remote communication equipment, such as femtocell sites coupled to nodes in a ring network. This may involve isolating a frequency reference signal from a DSL (Digital Subscriber Line) communication link which is a constituent link of a bonded communication link, for example. In a ring network, received synchronization information could be used in synchronizing a locally connected installation of communication equipment, and passed for transmission in the ring network for synchronizing other communication equipment. Such dropping and passing of an analog frequency reference signal could be applied in networks having other topologies as well. At least some embodiments of the invention are applicable to optical links.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: April 29, 2014
    Assignee: Genesis Technical Systems Corp.
    Inventors: Stephen P. Cooke, Tino Zottola
  • Patent number: 8713324
    Abstract: System and methods provide tracking capabilities by one or a plurality of satellites for a mobile terrestrial terminal. A user requests that a satellite track a particular mobile terrestrial terminal. If the user privilege level allows for this level of control, the satellite adjusts to track the identified terminal. One method for tracking involves the use of a steerable antenna in which the antenna steers to maintain a footprint over the identified mobile terminal. Another method for tracking involves moving the satellite itself to maintain a footprint over the identified mobile terminal. The tracking functionality may utilize a closed loop tracking method.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: April 29, 2014
    Assignee: OverHorizon (Cyprus) PLC
    Inventors: Per Wahlberg, Kennet Lejnell
  • Patent number: 8655263
    Abstract: A method for searching for a broadcast/multicast single frequency network cluster, when a terminal needs to receive the broadcast/multicast service in the broadcast/multicast single frequency network cluster, the terminal synchronizes to a non broadcast/multicast single frequency network cell which is associated with the broadcast/multicast single frequency network cluster; and the terminal searches for the broadcast/multicast single frequency network cluster on the basis of the information indicated by the system information in the non broadcast/multicast single frequency network cell. So that the UE can search for the corresponding MBSFN cluster, and can receive the MBMS service in the searched MBSFN cluster.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: February 18, 2014
    Assignee: China Academy of Telecommunications Technology
    Inventors: Xuelong Wang, Yu Ding, Shiyan Ren, Lei Mao
  • Patent number: 8639182
    Abstract: A communications system, apparatus, method, and computer program product for inter-satellite and inter-spacecraft crosslinks (ISL) with non-ISL optimized antennas where at least one component of the communications system has the potential energy to go into space. The system includes a mobile communications platform that includes an ISL antenna configured to transmit information through a non-ISL antenna of another communications platform. The non-ISL antenna does not track a trajectory of the mobile communications platform. The mobile communications platform includes a controller configured to determine a location of the mobile platform; determine whether the non-ISL antenna is within communications range; and prepare a signal for relayed transmissions through a non-ISL antenna to another communications platform in a signal format that is decipherable by this other communications platform.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: January 28, 2014
    Inventor: Roscoe M. Moore, III
  • Patent number: 8625572
    Abstract: Systems and methods provide a network's synchronization status to a terminal when the terminal receives a transmission from the network. This network synchronization status can be indicated in accordance with various methods including, but not limited to the following: with a status flag in a network message; in a network capability indication; in a network's positioning capability indication; cell/network time relation information; in a time relation information of different Radio Access Technologies; and implicitly with another parameter and/or by a request for a certain measurement. When the network's synchronization status is determined, accurate time information/time assistance data can be maintained at the terminal.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: January 7, 2014
    Assignee: Nokia Corporation
    Inventors: Lauri Wirola, Ismo Halivaara, Jari Syrjärinne
  • Patent number: 8611811
    Abstract: A method of performing ranging through a relay station (RS) and supporting thereof is disclosed. If ranging is performed in a system which performs communication between a mobile station and a base station through relay of a relay station, the ranging is performed under the leading of the relay station. In other words, if the relay station determines whether ranging between the mobile station and the relay station is required and also determines transmission parameter adjustment values and reports the determined result to the base station, the base station performs the ranging in such a manner that it prepares a message suitable for a specific format and forwards the message to the mobile station through the relay station.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: December 17, 2013
    Assignee: LG Electronics Inc.
    Inventors: Ae Ran Youn, Ki Seon Ryu, Du Hyun Mun, Beom Joon Kim
  • Patent number: 8600296
    Abstract: Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: December 3, 2013
    Assignee: ViaSat, Inc.
    Inventor: Mark J. Miller
  • Patent number: 8600297
    Abstract: Devices and methods are provided for providing self-timing and self-locating in an access point (AP) base station. In one embodiment, the method involves receiving Satellite Positioning System (SPS) signals from a first data source (e.g., plurality of satellites), wherein the SPS signals may include SPS time data, SPS frequency data, and SPS position data. The method may further involve obtaining from a second data source (e.g., cell site, terrestrial navigation station, server, user input interface, etc.) at least one of second time data, second frequency data and second position data, and determining relative reliability of the first and second data sources.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: December 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: John W. Ketchum, Srinath Nagaraj, Ashok Bhatia, Eric J. Katzfey, Lalitaprasad V. Daita, Sekharjyoti Baruah
  • Patent number: 8599825
    Abstract: A system clock synchronization apparatus, for use in a mobile communication system, supplies a GPS clock received from a GPS reception module to a Radio Frequency clock generation module and selects a candidate system clock. The candidate system clock is selected from among plural candidate system clocks having different phases, which can be most stably synchronized with a reference synchronization time signal as the final system clock. The apparatus includes a Global Positioning System reception module; a Radio Frequency clock generation module that generates a system reference clock and outputs an RF clock generated by synchronizing the system reference clock to the GPS clock in phase; and a system clock generation module that generates multiple candidate system clocks having different phases using the RF clock and selects one of the candidate system clocks which generates in a range of an enable duration of the reference synchronization time signal.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: December 3, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Keun Bok Kim
  • Patent number: 8594662
    Abstract: A method for protecting communications between an aircraft and a spacecraft in outer space including flying the aircraft in the earth's atmosphere at an altitude above 40,000 feet from the earth, and preferably above 50,000 feet, and transmitting a signal from the aircraft to the spacecraft having a frequency within a range of 50-70 GHz. The method includes selecting the frequency of the signal based on the altitude of the aircraft and the elevation angle between the spacecraft the aircraft.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: November 26, 2013
    Assignee: Northrop Grumman Systems Corporation
    Inventor: Peter J. Hadinger
  • Patent number: 8577283
    Abstract: A repeater that facilitates communication in a wireless environment comprises a scheduling component that analyzes a schedule relating to when communications are active in the forward link direction and when communications are active in the reverse link direction, the communications are subject to time division duplexing. An amplifier that amplifies received communications as a function of the schedule. The repeater can further comprise a configuration component that configures the amplifier to amplify the received communications in one or more of a forward link direction and a reverse link direction.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: November 5, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Richard Finch Dean, Kenneth Robert Baker
  • Patent number: 8565823
    Abstract: A basestation in a cellular communication system corrects frequency errors in signals generated within the basestation. The frequency errors may be corrected on the basis of signals transmitted by one or more other basestation within the network. As an alternative, the basestation may request information from one or mobile devices that are also able to detect transmissions from other basestations.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: October 22, 2013
    Assignee: Ubiquisys Limited
    Inventors: Alan Carter, Stephen Whittaker
  • Patent number: 8538327
    Abstract: User equipment of a communication system in one aspect obtains data indicative of the position of a satellite, and obtains data indicative of the position of the user equipment. The user equipment computes a delay measure based on the data indicative of the position of the satellite and the data indicative of the position of the user equipment, and adjusts the timing of a communication transmitted from the user equipment to the satellite based on the delay measure. In an illustrative embodiment, the user equipment receives data indicative of position and velocity of the satellite, and adjusts both timing and frequency of the communication based on the position and velocity data. The timing and frequency adjusted communication may then be transmitted to the satellite over a unicast uplink channel.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: September 17, 2013
    Assignee: Alcatel Lucent
    Inventors: Zulfiquar Sayeed, Stephen A. Wilkus
  • Patent number: 8521081
    Abstract: A repeating apparatus in a wireless communication system includes: a signal detection unit configured to receive a signal from a base station or a mobile station and detect strength of the signal; a control unit configured to compare the signal strength detected by the signal detection unit with signal strength predetermined by the system and provide comparison information; and an output signal control unit configured to receive the comparison information from the control unit and adjust and amplify gain of a signal transmitted to the base station or the mobile station.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: August 27, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Byung-Su Kang, Heon-Kook Kwon, Kwang-Chun Lee
  • Patent number: 8514774
    Abstract: A method, and components for performing such method, is provided for synchronizing multiple user signals in a multi-user communication system. An interference matrix is generated based on time delay and frequency offset information for the active users accessing an OFDMA uplink receiver. User signals are received from the active users and are segmented into blocks, and the interference matrix is applied to each of the blocks. The received user signal is OFDM demodulated and un-used sub-carriers are discarded. Typically, the method includes also applying a factorization matrix formed by factoring a correction matrix created from the interference matrix and an inverse matrix formed based on the factoring results to the user signal blocks, e.g., the correction step includes multiplying each of the blocks from the user signal by each of these three matrices. The corrected user blocks are then concatenated to form a corrected vector signal.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: August 20, 2013
    Assignee: STMicroelectronics (Beijing) R&D Company Ltd.
    Inventors: Yiqun Ge, Wuxian Shi, Juan Du
  • Patent number: RE45107
    Abstract: A satellite radiotelephone system includes a space-based component, a plurality of ancillary terrestrial components, and a plurality of radiotelephones. The space-based component is configured to provide wireless radiotelephone communications using satellite radiotelephone frequencies. The plurality of ancillary terrestrial components include a plurality of ancillary terrestrial component antennas configured to provide wireless radiotelephone communications using at least one of the satellite radiotelephone frequencies in a radiation pattern that increases radiation below the horizon compared to above the horizon. The plurality of radiotelephones are configured to communicate with the space-based component and with the plurality of ancillary terrestrial components. Each radiotelephone also includes a GPS signal processor and a GPS mode filter that is configured to suppress energy at (1575.42??) MHz, where 0<??16.42 MHz. Related radiotelephones and methods are also discussed.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: September 2, 2014
    Assignee: ATC Technologies, LLC
    Inventor: Peter D. Karabinis