Using Synchronization Information Contained In A Frame Patents (Class 370/509)
  • Patent number: 8446973
    Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: May 21, 2013
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8437245
    Abstract: A integrated circuit includes logic configured to support smart-utility-network communication using an integer number of data bits per symbol for 96, 48, 24, 12, and 4 data subcarriers across IFFT sizes of 128, 64, 32, 16, and 8.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: May 7, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Timothy M. Schmidl, Anuj Batra, Srinath Hosur
  • Patent number: 8437371
    Abstract: Discloses is a gateway, base station, communication network and synchronization method thereof. The method comprises: at time T1, sending from the gateway to the base stations a synchronization request signal; at time T2, receiving by the base stations the synchronization request signal; at time T3, sending from the base stations to the gateway the synchronization response comprising the times T2 and T3; at time T4, receiving by the gateway the synchronization response signals; and calculating for the base stations a mapping relationship between the time system of the gateway and the time system of the base station is calculated based on the times T1, T2, T3 and T4.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: May 7, 2013
    Assignee: Alcatel Lucent
    Inventors: He Wang, Zhongji Hu, Yonggang Wang, Hua Chao, Yu Chen, Pingping Xing
  • Patent number: 8433005
    Abstract: A robust initial frame detection and symbol synchronization system and methodology are provided. In particular, a first pilot is employed in conjunction with three acquisition stages. In the first stage, an attempt is made to observe the leading edge of the correlation curve associated with the first pilot symbol. In the second stage, a determination is made as to whether a leading edge was detected in the first stage by attempting to observe a flat portion and/or trailing edge of the correlation curve. Furthermore, during this second stage, a frequency loop can be updated to account for frequency offset. The third stage is for observing the trailing edge of the curve if it was not already observed in stage two. Upon detection and confirmation of receipt of the first pilot, a second pilot can subsequently be employed to acquire fine symbol timing.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: April 30, 2013
    Assignee: Qualcomm Incorporated
    Inventor: Alok Kumar Gupta
  • Patent number: 8428206
    Abstract: A method and system of fine timing synchronization for an OFDM signal. The OFDM signal is coarse timing synchronized, generating a synchronization sequence and a CFR (Channel Frequency Response). The synchronization sequence is removed. A correlation coefficient of the correlation between the CFR applied to a number of carriers and the number of carriers with different window shifts is calculated. The largest window shift corresponding to a downsampling factor is indicated by the lowest correlation coefficient greater than a threshold. The CFR is downsampled by the downsampling factor, and an inverse FFT is performed on the downsampled CFR with a reduced number of calculations reduced by the downsampling factor, transforming the CFR into a CIR. A fine timing synchronization position is determined from the CIR and is utilized by an FFT unit within an OFDM receiver to accurately receive OFDM symbols of the OFDM signal.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: April 23, 2013
    Assignee: NXP B.V.
    Inventor: Yan Li
  • Patent number: 8428108
    Abstract: In a signal processing apparatus a synchronizer acquires synchronization with the spreading code of an intermediate frequency signal converted from a signal received from a satellite in a global positioning system. A demodulator then demodulates a message contained in the intermediate frequency signal. A measuring unit outputs a primary signal to a predetermined signal line, the primary signal expressing positioning results for the apparatus as measured on the basis of the demodulated message. A secondary signal output unit attaches a predetermined header to a secondary signal and outputs the result to the predetermined signal line, the secondary signal containing at least the intermediate frequency signal, or a signal generated from the intermediate frequency signal.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: April 23, 2013
    Assignee: Sony Corporation
    Inventors: Katsuyuki Tanaka, Manabu Nitta, Hideki Takahashi
  • Patent number: 8422679
    Abstract: A transmitting device encrypts DMR voice superframes using encryption parameters and sends the encryption parameters in at least one of the voice superframes by: identifying a selected number of bits from a plurality of vocoder frames the voice superframe; replacing each of the identified bits with a corresponding bit of a first encryption parameter; placing at least one encryption parameter in an embedded signaling field of the voice superframe; and transmitting the voice superframe with the encryption parameters to a receiving device. The receiving device extracts the encryption parameters, which can be a key identifier, an algorithm identifier, and an initialization vector for use in decrypting messages from the transmitting device.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: April 16, 2013
    Assignee: Motorola Solutions, Inc.
    Inventors: Dipendra M. Chowdhary, John P. Belmonte, David G. Wiatrowski
  • Patent number: 8416902
    Abstract: A clock and data recovery device recovers data from a sequential stream of data that includes bursts of data separated by gaps. Each burst of data arrives with its own phase and with its own deviation from a nominal frequency. The bursts of data begin with a preamble that is utilized to determine the timing of the burst. The clock and data recovery device determines the timing of a burst of data using signals from one or more demultiplexers or samplers. At the start of each burst of data, sampled input signals are analyzed by an edge detector to determine a sample phase for the burst. A selector utilizes the sample phase determined by the edge detector to choose which of the sampled input signals to use to produce output data signals from the clock and data recovery device.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: April 9, 2013
    Inventors: Ian Kyles, Eugene Pahomsky
  • Patent number: 8411705
    Abstract: An adaptive clock recovery (ACR) system has a first closed-loop control processor (e.g., a first proportional-integral (PI) processor) that processes an input phase signal indicative of jittery packet arrival times to generate a mean phase reference. The input phase signal is compared to the mean phase reference to generate delay-offset values that are indicative of the delay-floor corresponding to the packet arrival times. The mean phase reference and the delay-offset values are used to generate offset-compensated phase values corresponding to the delay-floor. The ACR system also has a second closed-loop control processor (e.g., a second PI processor) that smoothes the offset-compensated phase values to generate an output phase signal that can be used to generate a relatively phase stable recovered clock signal, even during periods of varying network load that adversely affect the uniformity of the packet arrival times.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: April 2, 2013
    Assignee: LSI Corporation
    Inventor: P. Stephan Bedrosian
  • Patent number: 8412250
    Abstract: Methods and systems for slow associated control channel signaling are disclosed. An example method for securing communications in a mobile network disclosed herein comprises transmitting a first variant of a message of a first type on a first slow associated control channel (SACCH) before ciphering is started on the first SACCH, and after ciphering is started on the first SACCH, transmitting a second variant of the message of the first type on the first SACCH, and subsequently transmitting the second variant of the message of the first type on the first SACCH, wherein the subsequently transmitted second variant of the message of the first type is the next transmitted message of the first type on the first SACCH.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: April 2, 2013
    Assignee: Research In Motion Limited
    Inventors: David Hole, Eswar Kalyan Vutukuri
  • Patent number: 8406218
    Abstract: A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 26, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20130064254
    Abstract: An IP network includes a central entity and at least one customer premises equipment (CPE) device. The central entity generates a program clock reference (PCR) clock and provides audio-visual packets to a CPE based on the PCR clock. The CPE sets a first clock based on the PCR clock for decoding operations. The CPE sets a second clock that is independent from the first clock for audio and video output operations. For example, the CPE can process the audio-visual packets using the second clock.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 14, 2013
    Applicant: Broadcom Corporation
    Inventors: Jeffrey FISHER, Brian Schoner, Rajesh S. Mamidwar
  • Patent number: 8391271
    Abstract: Time synchronization among nodes in a wireless mobile ad hoc network (MANET) is obtained using a cross layer approach. Each node maintains a routing table that contains entries corresponding to other nodes of the network that are one or more hops away from the node, and topology messages are exchanged periodically among the nodes in order to update their routing tables. A network master node is selected, and remaining nodes that are one or more hops away from the master node are defined as slave nodes. The master node includes master timing information in the topology messages it transmits. The timing information is concatenated to include a first time (T1) at which a topology message was received by the master from each of the slave nodes, and a second time (td) at which the master node transmits a topology message after receiving all the topology messages from the slave nodes.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: March 5, 2013
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Shaomin Mo, John A. Gu, Jessica Y. Hsu, Ming Luo, Reza Ghanadan
  • Patent number: 8391198
    Abstract: A reliable synchronization apparatus and method within a multicast and broadcast service (MBS) zone having m sync executers (SEs) belonging to n retransmission zones is provided. Each retransmission zone has a selected leader SE and other member SEs. The apparatus comprises a sync controller and the n selected leader SEs. When the Sync controller multicasts a sync ruler to all SEs in a retransmission zone, the leader SE that loses the Sync ruler sends a NACK message to request the sync controller to retransmit the sync ruler. An election is triggered for updating leader information and announcing election to all SEs. The member SE that loses the sync ruler sends a NACK message to request its leader or the Sync controller to retransmit the sync ruler.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 5, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Wei-Han Kuo, Chia-Lung Liu, Jui-Tang Wang, Jen-Shun Yang
  • Patent number: 8392931
    Abstract: A method for communicating between devices in a network includes creating an I/O tunnel between a first device and a second device through the network. The I/O tunnel is associated with I/O resources in both the first device and the second device, and wherein at least one of the I/O resources comprises a buffer resource. A data transfer operation may be sent between the first device and the second device by consuming at least some of the I/O resources associated with the I/O tunnel. A plurality of commands or a plurality of responses can be aggregated into a single buffer resource. Upon completion of the data transfer operation, the I/O resources that are consumed are automatically renewed.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: March 5, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Clark Lubbers, Susan Elkington, Randy Hess, Stephen J. Sicola, James McCarty, Anuja Korgaonkar, Jason Leveille
  • Patent number: 8391341
    Abstract: Sub-microsecond time transfer in a GPS/GNSS receiver using a weak GPS/GNSS signal is provided. The digitized complex baseband signal and the generated PN code are cross-correlated for each code period so as to output a complex correlation value at each code epoch of the generated PN code, where a sequence of the output correlation values form a data stream representing the navigation message. Bit synchronization generates bit sync pulses at bit boundaries. The location of a target segment having a known sequence at a known bit location in the navigation message is detected by searching through a plurality of sub-frames and accumulating search results for the plurality of subframes. Transmission time of the target segment is determined from the detected location of the target segment, with a certain time ambiguity. Accurate local time is determined by solving the time ambiguity using approximate time obtained from an external source.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: March 5, 2013
    Assignee: Magellan Systems Japan, Inc.
    Inventor: Lawrence R. Weill
  • Patent number: 8385374
    Abstract: A multilane communication device and methods for using the multilane communication device. In one embodiment, a physical coding sub-layer module comprising includes multiple data transfer lanes in a port of a multi-lane Ethernet switch for transferring blocks of data between devices in the port. The physical coding sub-layer module further includes a synchronization marker generator for generating synchronization markers to be periodically transmitted over the multiple data transfer lanes. The physical coding sub-layer module further includes a data marker module configured to generate at least two data marker blocks from a respective portion of a synchronization marker and a respective portion of a block of data, and to provide the at least two data marker blocks to respective first and second ones of the multiple of data transfer lanes.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: February 26, 2013
    Assignee: Marvell Israel (M.I.S.L.) Ltd.
    Inventor: Aron Wohlgemuth
  • Patent number: 8385316
    Abstract: Methods and apparatus related to peer to peer communication networks are described. A peer to peer timing structure is implemented which includes a pattern of different types of time intervals including at least a peer discovery time interval and a traffic interval. A wireless communications device, supporting peer to peer operations stores the peer to peer timing structure information, accesses the stored information, and used the accessed information to determine an operation to be performed during a current time period. The operation is, e.g., a peer discovery operation, a peer to peer timing synchronization operation, a peer paging operation, or a peer to peer traffic signaling operation. Various exemplary relationships between the different types of intervals, including relative frequencies, relative durations, and spacing information, are described.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: February 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Rajiv Laroia, Junyi Li, Aleksandar Jovicic, Thomas Richardson, Xinzhou Wu
  • Patent number: 8379674
    Abstract: A target time stamp on a target time-base is obtained from a originating time stamp on an originating time-base of an audio video transport system by first taking samples simultaneously from transport streams having the originating time-base and target timebase, respectively. A current sample and an immediately preceding sample for the originating time-base and target time-base are stored, respectively. A first difference is determined between the current sample and an immediately preceding sample for the originating time-base and a second difference is determined between the current sample and an immediately preceding sample for the target time-base, respectively.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: February 19, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Adrian Charles Turner, Brian Richardson
  • Patent number: 8378846
    Abstract: A method and apparatus is disclosed for providing a metering site transceiver (12 or 15) with the ability to operate in a mobile back-up network (26) to signal utility consumption data that would otherwise be transmitted to a fixed receiver (30) in a fixed network AMR system. A mobile collection back-up capability allows a vehicle collection system (26, 27) to be used to read the remote meters (11, 14) in the fixed network, when a gateway (30) is detected as not communicating with the site transceiver (12 or 15).
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: February 19, 2013
    Assignee: Badger Meter, Inc.
    Inventors: John A. Olson, Kelly Laughlin-Parker, Mark Lazar, Michele R. B. Malinowski, Jeffrey Schreiner
  • Patent number: 8379627
    Abstract: A wireless communication device comprises a first sub-system arranged to pass data to a second sub-system comprising timing synchronization logic operably coupled to a counter, such that data is sampled by the timing synchronization logic when passed to the second sub-system from the first sub-system wherein the wireless communication device is characterized in that the timing synchronization logic is arranged to determine a position of a first data frame and in response thereto initiate a counting process of the counter and determine a position of a second data frame and in response thereto determine a count value from the counting process of the counter and in response to the count value determine whether to initiate a timing advance or timing retard operation on the data being passed to the second sub-system. In this manner, the inventive concept provides the wireless communication device with a mechanism to achieve timing synchronization.
    Type: Grant
    Filed: January 2, 2007
    Date of Patent: February 19, 2013
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Norman Beamish, Paul Kelleher, Daniel B. Schwartz
  • Patent number: 8374229
    Abstract: A method for the generation of a signal including a minimum of disturbances and noise is provided. A method for the detection of a signal including a minimum of disturbances and noise is also provided. An element of the signal is functionally dependent on at least one further element of the signal.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: February 12, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventor: Jaroslaw Kussyk
  • Patent number: 8374115
    Abstract: In a cellular wireless network, methods and apparatus are disclosed for a signal broadcasting scheme that can be individually augmented for users with poor reception. The network employs a first downlink channel for broadcasting data to all mobile stations, a second downlink channel for sending signals to a specific mobile station in a cell, and an uplink channel for feeding back information to the base station. To achieve a certain user reception quality, the system adjusts its broadcasting parameters based on the statistical analysis of the feedback data. If some users still require better reception, the system individually augments their broadcast signals via the second downlink channels. Methods and apparatus are also disclosed for synchronization of data distribution by base stations, which, in part, allows the receivers to combine the receiving signals and improve their reception quality.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: February 12, 2013
    Assignee: Neocific, Inc.
    Inventors: Haiming Huang, Xiaodong Li, Titus Lo, Kemin Li
  • Patent number: 8374163
    Abstract: A first wireless node may synchronize its timeslots with the timeslots of a second wireless node that was previously transmitting and receiving data in an asynchronous manner with respect to the timeslots of the first wireless node. By synchronizing timeslots, the wireless nodes may avoid interference that may otherwise occur if the wireless nodes operate in an asynchronous manner. A wireless node shares its timing information with other wireless nodes by repeatedly transmitting timing reference signals in conjunction with a synchronization metric that defines the relative priority of the timing reference. In the event a wireless node does not receive a GPS-based timing reference, the wireless node may synchronize to a timing reference based on the parameters of the synchronization metric of that timing reference. In the event a wireless node does not receive any timing references, the wireless node may define and advertise it's a timing reference and associated synchronization metric.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: February 12, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Gavin Bernard Horn, Avneesh Agrawal, Ashwin Sampath
  • Patent number: 8369309
    Abstract: A wireless communication system broadcasts a control signal at a first frequency band from a base station and allocates additional frequency band(s) for transmitting data via terminal(s). A control signal at the first frequency band indicates the location of the additional frequency band(s) and is not transmitted over the additional frequency band(s). Wireless data transmission is simultaneously performed over the first frequency band and the additional frequency band(s). Each terminal receives the control signal, which is used in time-synchronizing frames between the wireless data transmission at the first frequency band and the wireless data transmission at the additional frequency band(s). The control signal also includes control data for managing wireless data transmission between the base station and the terminal(s) at the first frequency band, and is utilized instead of a control signal at the additional frequency band(s).
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: February 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Minoru Kosaka
  • Patent number: 8369386
    Abstract: A receiver includes a receiving unit that receives a signal from a satellite, a frequency conversion-discretization unit that converts the signal received in the receiving unit into an intermediate frequency signal of a frequency bandwidth including 0 Hz, and discretizes the frequency-converted intermediate frequency signal with a predetermined sampling frequency, a filter unit that filters the discretized signal, which is output from the frequency conversion-discretization unit, through a predetermined filter, a synchronization acquisition unit that acquires synchronization of a spreading code in the discretized signal filtered by the filter unit, and a synchronization holding unit that holds the synchronization of the spreading code, which is acquired by the synchronization acquisition unit.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: February 5, 2013
    Assignee: Sony Corporation
    Inventors: Hideki Takahashi, Katsuyuki Tanaka
  • Patent number: 8363681
    Abstract: According to various embodiments of the disclosure, systems, methods and apparatuses are provided for using ranging to improve network efficiency. In particular, various embodiments of the disclosure provide ranging to improve local clock time synchronization. According to one embodiment, a method for synchronizing a plurality of nodes on a communication network is provided, comprising: exchanging local clock times between a first node and a second node over the communication network; performing a ranging method between the first and second nodes based on the local clock times exchanged between the first and second nodes, wherein the ranging method results in an estimated propagation delay between the first and second nodes; and adjusting the local clock times of the first and second nodes based on the estimated propagation delay, thereby resulting in a synchronized local clock time at the first and second nodes.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: January 29, 2013
    Assignee: Entropic Communications, Inc.
    Inventor: Arndt Mueller
  • Patent number: 8363771
    Abstract: Provided are a transmission device, a receiving device, and a communication system having a simple configuration and capable of reliably executing the confirmation of a changed bit rate. The communication system 1 sends, to the receiving device 3, a serial data signal Sdata that is set as a constant value across a period of a constant multiple of a cycle of the clock when a bit rate of a serial data signal Sdata in the transmission device 2 is changed. The receiving device 3 that received the serial data signal Sdata receives training data Tdata from the transmission device 2 when it is determined that the serial data signal Sdata is a constant value across a period of a constant multiple of a cycle of the clock, and proceeds to the processing of confirming the changed bit rate.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: January 29, 2013
    Assignee: Thine Electronics, Inc.
    Inventors: Hironobu Akita, Seiichi Ozawa, Yohei Ishizone, Satoshi Miura
  • Patent number: 8358726
    Abstract: A source synchronous signal synchronization system includes a differential signal receiver; a tunable input delay element coupled to the receiver; an input serializer/deserializer (ISerDes) coupled to the tunable input delay; an alignment unit coupled to the ISerDes; and a delay control unit coupled to the tunable input delay, the ISerDes, and the alignment unit.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: January 22, 2013
    Assignee: NEC Laboratories America, Inc.
    Inventors: Junquiang Hu, Tyrone Kwok, Ting Wang
  • Patent number: 8355464
    Abstract: A downlink frame generation device arrange a plurality of synchronization channel symbols and a plurality of broad-casting channel symbols in a common bandwidth of a system so that the symbols may neighbor each other on the time axis. The downlink frame generation device applies a precoding vector to the synchronization channel symbols and the broadcasting channel symbols to generate a plurality of downlink frames corresponding to a plurality of antennas. The precoding vector is variable by a sector for transmitting a plurality of downlink frames and a subframe in which a plurality of synchronization channel symbols are positioned. The precoding vector is independent of an index of a subcarrier.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: January 15, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kap-Seok Chang, Il-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Hyo-Seok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 8345561
    Abstract: A method and system for measuring latency is provided. A monitor node is used to measure latency in a computer network or in a computing device by time stamping signal messages sent from nodes in the computer network and/or tasks in a particular node or device. The time stamps are generated using a system clock of the monitor node to reduce any discrepancies in timing. In addition, the monitor node may compensate for latencies between the monitor node and each of the one or more nodes or devices across which latency is to be measured. Signal messages may include a data message ID and/or a node ID identifying the message that is being tracked and for which latency is being measured. Latency may further be measured across multiple tasks being performed in the same or different nodes or devices by transmitting signal messages for each of the multiple tasks.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: January 1, 2013
    Assignee: Rueters America Inc.
    Inventors: Timothy P. Edwards, Rajasekhar R. Gunturu, Brian D. Sandri, John Patrick Merrick
  • Patent number: 8340656
    Abstract: Various embodiments facilitate data communication between a client device and a remote device over a voice channel of a telephone system. In one embodiment, the data communication over the voice channel is synchronized to align with voice frames utilized by the telephone system to transmit communicated data between the devices. In some embodiments, the synchronization is performed by determining an offset between a received synchronization audio signal and the voice frames used by the telephone system to process the synchronization audio signal, such as based on an amount of energy present in the received synchronization audio signal.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: December 25, 2012
    Assignee: EchoStar Technologies L.L.C.
    Inventors: Gopi Manne, William Beals
  • Patent number: 8335241
    Abstract: A bus system for the real-time communication of a superordinate unit with one or more subordinate units is used for exchanging address and data information via a bus. For the rapid exchange of messages, further fields are provided between the fields for the address and data information.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: December 18, 2012
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Martin Huber, Hendrik Koehler
  • Patent number: 8335234
    Abstract: The present invention relates to the domain of control methods of a plurality of formatting equipment (FE1, FE2) of streams (TS) used as backup. The items of equipment receive the streams (TS) and send, to a modulator (MOD1), formatted streams (TS_SFN1, TS_SFN2) comprising a succession of blocks of packets called “megaframe” and megaframe initialization packets (MIP) used by the modulator (MOD1) to identify in time a megaframe (MFn) relatively to a time base (TB).
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: December 18, 2012
    Inventors: Stéphane Fillod, Pascal Gravoille, Stéphane Guillemot
  • Patent number: 8335861
    Abstract: A method and system for processing correction field information are provided. The method includes: receiving a packet, and obtaining a first correction value carried by the packet; obtaining first time information and second time information; obtaining a second correction value according to the first correction value and the first time information; setting the second correction value in the packet; setting the second time information in the packet; obtaining third time information and fourth time information; obtaining a third correction value according to the second correction value, the second time information, the third time information, and the fourth time information; and setting the third correction value in the packet. The processing of the time information and the processing of the correction field information are performed with a set of processing mechanism, and the implementation is simpler.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: December 18, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wenhua Sun, Xiaobo Wang, Bingbo Li, Wenguang Xu, Shengbing Yang, Youhao Deng, Jihui Wang
  • Patent number: 8332059
    Abstract: For adding additional data, such as multi-channel extension data, to base data, such as conventional stereo data, a test fingerprint of test data relating to a test time instant of the test data is provided. The test data equals the additional data or the base data or depends on the additional data or the base data in parametric manner. Using the test fingerprint, reference time instant information is determined, which depends on a reference time instant in reference data, the reference data being the conventional stereo data. Finally, the additional data or the base data is manipulated, namely using the reference time instant information and the test time instant information, to obtain manipulated data, by which synchronous reproduction of the data information can be performed. Thus, a robust and flexible possibility for synchronous, especially late extension of base data by additional data is obtained.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: December 11, 2012
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Juergen Herre, Oliver Hellmuth, Andreas Hoelzer, Stefan Geyersberger
  • Patent number: 8331564
    Abstract: The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by a short sequence group-a wireless communication system uses a plurality of short sequences and the plurality of short sequences are grouped into a plurality of short sequence group-to which the first short sequence is assigned; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; and mapping the secondary synchronization signal that includes the scrambled first short sequence and the scrambled second short sequence to a frequency domain.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: December 11, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok Chang, Il Gyu Kim, Hyeong Geun Park, Young Jo Ko, Hyo Seok Yi, Chan Bok Jeong, Young Hoon Kim, Seung-Chan Bang
  • Patent number: 8331569
    Abstract: The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a group to which the first short sequence belongs, the wireless communication system using a plurality of short sequences and the plurality of short sequence being divided into a plurality of groups; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: December 11, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok Chang, Il Gyu Kim, Hyeong Geun Park, Young Jo Ko, Hyo Seok Yi, Moon Sik Lee, Young Hoon Kim, Seung Chan Bang
  • Patent number: 8325784
    Abstract: A communication apparatus is connected to a transmission channel for transmitting data to another communication apparatus. The communication apparatus includes: a communication frame generator which generates a communication frame for storing the data; and a controller which controls to insert a pilot symbol into the communication frame based on a state of the transmission channel.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: December 4, 2012
    Assignee: Panasonic Corporation
    Inventors: Taisuke Konishi, Nobuhiko Noma, Nobutaka Kodama, Hisao Koga, Shigeo Yoshida
  • Patent number: 8325705
    Abstract: The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a first short sequence and a third scrambling sequence determined by a second short sequence; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; scrambling the second short sequence with the first scrambling sequence; scrambling the first short sequence with at least the third scrambling sequence; and mapping one second synchronization signal including the first short sequence scrambled with the first scrambling sequence and the second short sequence scrambled with at least the second scrambling sequence and another second synchronization signal including the second short sequence scrambled wi
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: December 4, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok Chang, Il Gyu Kim, Hyeong Geun Park, Young Jo Ko, Hyo Seok Yi, Moon Sik Lee, Young Hoon Kim, Seung Chan Bang
  • Patent number: 8320360
    Abstract: A method and apparatus for transmitting a primary and secondary synchronization channel is provided herein. During operation a transmitter will transmit a primary synchronization channel (P-SCH) in a subframe and a secondary synchronization channel (S-SCH) in the subframe. The S-SCH is modulated by a complex exponential wave and scrambled with a scrambling code. In certain embodiments of the present invention the P-SCH comprises a GCL sequence or a Zadoff-Chu sequence and the scrambling code is based on the GCL sequence index of the P-SCH.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: November 27, 2012
    Assignee: Motorola Mobility LLC
    Inventors: Masaya Fukuta, Hidenori Akita
  • Patent number: 8320437
    Abstract: In a method and a device for decoding a signal, the signal is transmitted via at least one connecting line of a data transmission system, in a user of the data transmission system receiving the signal. It is provided to measure the interval of a change—provided compulsorily in a transmission protocol used in the data transmission system—of the signal from rising to falling or from falling to rising edge. A tendency for an asymmetrical delay of the signal can be ascertained from the measured interval. The sampling of the bits of the received signal can be improved as a function of the interval or of the asymmetrical delay, for example, by setting the sampling instant in variable fashion. Alternatively, the interval or the asymmetrical delay can be utilized for diagnostic purposes.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: November 27, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Florian Hartwich, Andreas-Juergen Rohatschek, Eberhard Boehl
  • Patent number: 8320410
    Abstract: Relay devices and sink devices that provide synchronized audio and/or video outputs are described. A relay device receives a first communication packet from a source device. The first communication packet includes a data frame. A timestamp is generated. The timestamp is an estimate of a time at which content defined by the data frame will be “played.” A second communication packet is generated that includes the data frame and the generated timestamp. The second communication packet is transmitted from the relay device. In one implementation, the generated timestamp is received by a plurality of sink devices, and is used to synchronize output signals (e.g., sound and/or video images) of the sink devices. In another implementation, the generated timestamp is received by a sink device, and is used to synchronize an output signal of the sink device with an output signal of the relay device.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Mattias Per Agren
  • Patent number: 8321715
    Abstract: A communication apparatus having a clock interface unit supplying a clock signal for synchronization, includes a clock extracting section for extracting a clock component from a receive signal, a decoding section for generating a decoded signal by decoding in a predetermined encoding form the clock component extracted by the clock extracting section, a frame converting section for creating a receive frame by converting the decoded signal to a frame in a predetermined frame form, a determining section for determining whether the predetermined encoding form and the predetermined frame form are right or not on a basis of the receive frame, a setting section for performing setting regarding the clock signal on a basis of the encoding form and frame form determined to be right by the determining section, and a clock signal output section for outputting the clock signal generated on a basis of the setting by the setting section.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: November 27, 2012
    Assignee: Fujitsu Limited
    Inventors: Tatsuya Oku, Masato Hashizume, Hiroshi Nishida
  • Patent number: 8320508
    Abstract: A system including an estimation module, a processing module, and a control module. The estimation module is configured to generate a first set of channel estimates for a plurality of subcarriers of a received signal. The processing module is configured to generate a second set of channel estimates for the plurality of subcarriers, in which the second set of channel estimates are generated based on the first set of channel estimates. The control module is configured to estimate a preamble sequence in the received signal based on each of (i) the first set of channel estimates and (ii) the second set of channel estimates.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: November 27, 2012
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Hui-Ling Lou
  • Patent number: 8320571
    Abstract: The present invention relates to a method of generating a downlink frame.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: November 27, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok Chang, Il Gyu Kim, Hyeong Geun Park, Young Jo Ko, Hyo Seok Yi, Chan Bok Jeong, Young Hoon Kim, Seung Chan Bang
  • Patent number: 8315341
    Abstract: An embodiment is a method and apparatus to decode a signal using channel information. A channel state estimator generates a tone value representing channel information. A quantizer quantizes the tone value. A combiner combines de-interleaved symbols weighed by the quantized tone value. A comparator compares the combined de-interleaved symbols with a threshold to generate a decoding decision. Another embodiment is a method and apparatus to decode a signal using averaging. A channel estimator provides a channel estimate. A multiplier multiplies a quantized output of a demodulator with the channel estimate to produce N symbols of a signal corresponding to a carrier. A de-interleaver de-interleaves the N symbols. An averager averages the N de-interleaved symbols to generate a channel response at a carrier.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: November 20, 2012
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Kaveh Razazian, Maher Umari, Amir Hosein Kamalizad
  • Patent number: 8315276
    Abstract: In particular embodiments, an error correction during the transmission of the data word is made possible through the change of the modulation state at pre-defined time points.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: November 20, 2012
    Assignee: Atmel Corporation
    Inventor: Ulrich Friedrich
  • Patent number: 8311031
    Abstract: A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: November 13, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 8306069
    Abstract: The invention relates to synchronization applied to a data stream structured as super-frames. Each block in a super-frame comprises a slow synchronization part and at least one traffic frame. The slow synchronization parts in the super-frame result at least from a decomposition of a synchronization management word. Additional synchronization parts similar to the slow synchronization parts and distributed in place of traffic frame bits in the super-frame are inserted in the super-frame. The invention provides for fast synchronization coexisting with a pre-existing slow synchronization without increasing the bandwidth. The invention is particularly applicable to cryptographic synchronization between fixed and/or mobile terminal equipments operating in interconnected dissimilar networks whose synchronization time constants differ.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: November 6, 2012
    Assignee: Eads Secure Networks
    Inventor: Frederic Rousseau