Synchronization Information Is Distributed Over Multiple Frames Patents (Class 370/510)
  • Patent number: 8700794
    Abstract: A video transmission method is provided, which includes receiving state information from at least one mobile terminal that intends to perform a video stream service through a wireless network, determining a size of an image by selecting a specified spatial layer bit stream on the basis of the state information of the mobile terminal from a plurality of spatial layer bit streams generated at different bit rates during encoding of the bit stream, selecting a specified time and an SNR layer bit stream by increasing or decreasing time of the image and a layer position of the SNR layer bit stream on the basis of network parameters included in the state information of the mobile terminal, and transmitting the bit stream generated by extracting the specified layer bit stream of the selected layer to the mobile terminal.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: April 15, 2014
    Assignees: Samsung Electronics Co., Ltd., Korea University Research and Business Foundation
    Inventors: Sung-Kee Kim, Tae-Sung Park, Sung-Jae Ko, Hyeong-Min Nam
  • Patent number: 8693524
    Abstract: A synchronization method for impulse system ultra-wideband takes frame as basic unit for data transmission, each frame is divided into a preamble symbol part and a data part, wherein the preamble symbol part sends a known impulse sequence for channel estimation and synchronization; the data part takes the information to be transmitted; the preamble symbol part is divided into two parts of a positive and negative impulse sequence, which includes odd impulses with alternant positive and negative polarities, and a same direction impulse sequence, which is composed of impulses with same polarity and is the same as the polarity of the last impulse in the positive and negative impulse sequence. The method provides such advantages as high synchronization precision, small storage space, and capability of immediately finding out the synchronization position etc., and provides an important value for the development of the impulse system ultra-wideband wireless communication technique.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: April 8, 2014
    Assignee: Southeast University
    Inventors: Zaichen Zhang, Liang Wu, Xutao Yu, Guangguo Bi, Xiaohu You
  • Patent number: 8693460
    Abstract: The invention relates to a technique for controlling a synchronization of a terminal device (10) with a wireless network, e.g. an LTE network, wherein data are transmitted as a continuous data signal on a radio interface (11, 12) while being processed block-wise in the terminal (10). A method embodiment of the technique for achieving at least a downlink (11) synchronization comprises establishing a time-address mapping (TAM, 36) indicative of an association of a reference time value of an internal clock (32) with a reference address in the reception data buffer (16); determining an address of data samples representing the received data block in the reception data buffer (16) based on the time-address mapping; and initiating a block-wise reading of the data block from the reception data buffer (16) based on the determined address.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: April 8, 2014
    Assignee: Unwired Planet, LLC
    Inventors: Dietmar Lipka, Stefan Mueller-Weinfurtner, Steffen Reinhardt, Udo Wachsmann
  • Patent number: 8687657
    Abstract: A base station apparatus determines which mode of a subframe bundling mode (second mode) and a non-bundling mode (first mode) should be used by a user apparatus for communication, and reports a determination result. In the first mode, RTT period is a first period, and each of transmission and retransmission of the signal is performed every 1 TTI. In the second mode, RTT period is a second period that is longer than the first period, and each of transmission and retransmission of the signal is performed every plurality of TTIs. A radio resource to be used for retransmission is determined according to a first frequency hopping pattern in the first mode, and is determined according to a second frequency hopping pattern that is different from the first frequency hopping pattern in the second mode.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: April 1, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroyuki Ishii, Kohei Kiyoshima, Naoto Okubo
  • Patent number: 8675691
    Abstract: The embodiments provide an additional information insertion apparatus for a broadcasting system. The system includes a broadcasting signal transmitter configured to transmit a broadcasting signal along with a data extractor configured to extract a modulated signal by dividing the modulated signal from a modulator of the broadcasting signal transmitter. An additional data generator is configured to extract synchronization of the broadcasting signal from the extracted broadcasting signal, modulate the additional information based on the extracted synchronization, and generate a level of the modulated additional information to be a smaller level than a signal level of the modulated signal by as much as a predetermined value. A data synthesizer is provided to insert the additional data from the data generator into the modulated broadcasting signal.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: March 18, 2014
    Assignee: Electronics & Telecommunications Research Institute
    Inventors: Sung-Ik Park, Heung-Mook Kim, Young-Woo Suh, Jaekwon Lee
  • Patent number: 8675688
    Abstract: Provided are an apparatus and method of transmitting and receiving a wake-up signal. The method of receiving a wake-up signal includes the following: operating a radio frequency (RF) receiving unit that receives a wireless signal through an antenna during an SFD detecting time, wherein the SFD detecting time is shorter than a predetermined SFD detecting time period, according to the predetermined SFD detecting time period and detecting a start of frame delimiter (SFD) to indicate that the received wireless signal is a wake-up signal to wake-up a node in a sleep mode; and detecting the wake-up signal by continuously operating the RF receiving unit when the SFD is detected. Power consumption that is used to receive the wake-up signal can be reduced.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: March 18, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Cheon In Oh, Ho Yong Kang, Kyo Hoon Son, Nae Soo Kim
  • Patent number: 8649454
    Abstract: A detector receives detects a first known signal in a packet signal. An LTF correlation unit performs correlation processing on the packet signal received by a receiving unit. Upon detecting the arrival timing, an update correlation unit terminates a first window and performs correlation processing on the packet signal received by the receiving unit, in a second window. When correction timing is detected and when correction timing is more likely to be accurate than the arrival timing, an estimation unit changes the correction timing to the arrival timing; when the arrival timing is more likely to be accurate than the correction timing, the estimation unit maintains the arrival timing.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: February 11, 2014
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Keisuke Higuchi
  • Patent number: 8645804
    Abstract: Techniques are described that can be used to extend the data transmission rate specified by 10GBASE-KR of IEEE 802.3ap (2007) to more than 10 Gb/s using a multiple lane backplane. A signal for transmission over 10 Gb/s can be divided into multiple streams for transmission over multiple lanes. Multiple transceiver pairs can be used for transmission and receipt of the multiple streams. Each transceiver pair may comply with 10GBASE-KR of IEEE 802.3ap (2007).
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: February 4, 2014
    Assignee: Intel Corporation
    Inventors: Ilango Ganga, Richard Mellitz
  • Patent number: 8638895
    Abstract: In one embodiment, receiving an Ethernet signal over a channel, the Ethernet signal comprising a preamble frame, an idle frame, and a data frame, the preamble frame comprising one or more preamble codes; synchronizing to the Ethernet signal based on the preamble frame; replicating the one or more preamble codes; and training a decision feedback equalizer (DFE) based on the one or more replicated codes, the training enabling the DFE to use decision values at the DFE output to track channel variations.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: January 28, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmad Chini, Mehmet Tazebay, Scott Powell
  • Patent number: 8634506
    Abstract: Generate a series of digital data according to a pair of differential signals received from a low speed universal serial bus. Calibrate coarsely a frequency of an oscillator according to a width of an end-of-packet of the series of digital data. And calibrate finely the frequency of the oscillator according to a width of a SYNC pattern of the series of digital data.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: January 21, 2014
    Assignee: Weltrend Semiconductor Inc.
    Inventors: Fu-Yuan Hsiao, Ke-Ning Pan
  • Patent number: 8630316
    Abstract: Two clocks may be synchronized by calculating skew and offset values that may be determined from several correlation events. A correlation event may be the passing of messages in both directions between the two devices. The skew and offset values may be used to determine the time of non-correlated events. The clock synchronization may be performed on a real time basis or may be performed on a post processing basis. One method for calculating the skew and offset may use inequalities within a solution space to refine a solution set with multiple sets of correlation events.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: January 14, 2014
    Assignee: Microsoft Corporation
    Inventor: Erez Haba
  • Patent number: 8625564
    Abstract: A radio communication apparatus that performs radio communication with another communication apparatus includes an antenna unit, a contact detecting unit that detects contact with the another communication apparatus, a first modulating and demodulating unit for performing communication in a state in which the radio communication apparatus is remote from the another communication apparatus, a second modulating and demodulating unit for performing communication in a state in which the radio communication apparatus is in contact with the another communication apparatus, and a control unit that performs control to perform radio communication with the another communication apparatus via the antenna unit by selecting the first modulating and demodulating unit while the contact detecting does not detect contact with the another communication apparatus and selecting the second modulating and demodulating unit when the contact detecting unit detects contact with the another communication apparatus.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: January 7, 2014
    Assignee: Sony Corporation
    Inventor: Kenichi Kawasaki
  • Patent number: 8619786
    Abstract: Methods and apparatuses are provided for facilitating distributed transmissions among a plurality of access terminals for a transmission sequence. An access point may assign a predecessor transmitter device for each of a plurality of access terminals, and may transmit to each access terminal an instruction to follow a respective preceding transmission by the predecessor transmitter. An access terminal may receive the transmission including the instruction, and may monitor for and detect the preceding transmission. The access terminal may then transmit a transmission after the completion of an interframe space that may follow the detected preceding transmission.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: December 31, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Maarten Menzo Wentink
  • Patent number: 8619936
    Abstract: A radio system having multi-standard mixed mode radios is described. The mixed mode radios are used to support combining of digital baseband from a first and a second radio equipment controller. A primary clock associated with the first radio equipment controller and a secondary clock associated with the second radio equipment controller is provided. The quality of the primary clock is evaluated and the primary clock is referenced to the first radio equipment controller if the clock is determined to have appropriate quality factors. The quality of the secondary clock is then evaluated and the secondary clock is referenced to the second radio equipment controller if the secondary clock is determined to have appropriate quality factors. The second radio equipment controller is then referenced to the primary clock once the primary and secondary clocks are aligned.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: December 31, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Beata Mirek, Glen Rempel, Keith Dysart
  • Patent number: 8615032
    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 subframes 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: January 22, 2013
    Date of Patent: December 24, 2013
    Assignee: Magellan Systems Japan, Inc.
    Inventor: Lawrence R. Weill
  • Patent number: 8605847
    Abstract: In described embodiments, a transceiver includes a clock and data recovery module (CDR) with an eye monitor and a cycle slip monitor. The cycle slip detector monitors a CDR lock condition, which might be through detection of slips in sampling and/or transition timing detection. The cycle slip detector provides a check point to sense system divergence, allowing for a mechanism to recover CDR lock. In addition, when the CDR is out-of-lock, the various parameters that are adaptively set (e.g., equalizer parameters) might be invalid during system divergence. Consequently, these parameters might be declared invalid by the system and not used.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: December 10, 2013
    Assignee: LSI Corporation
    Inventors: Mohammad Mobin, Mark Trafford, Ye Liu, Vladimir Sindalovsky, Amaresh Malipatil
  • Patent number: 8594136
    Abstract: There is described a method for transmitting N parallel data flows on a parallel bus. The method comprises, at a first communication device: generating a further parallel data flow comprising alignment words periodically distributed with a period; at each period, rotating the N of parallel data flows and the further parallel data flow thus generating N+1 rotated parallel data flows, each comprising part of the alignment words periodically distributed with a frame period; transmitting the N+1 rotated parallel data flows on respective physical connections of the parallel bus. The method further comprises, at a second communication device: aligning the N+1 rotated parallel data flows by using the alignment words, thus compensating skew and obtaining N+1 aligned parallel data flows; and at each period, de-rotating the N+1 aligned parallel data flows, thus generating N de-rotated parallel data flows corresponding to the N parallel data flows.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: November 26, 2013
    Assignee: Alcatel Lucent
    Inventors: Silvio Cucchi, Riccardo Gemelli, Luigi Ronchetti
  • Patent number: 8594152
    Abstract: A communications network and method thereof include a base station controller configured to provide a repetition period of a primary synchronization channel to be equal to a predetermined integer value times a scrambling code length of the scrambling code of a common pilot channel. A user equipment in the network is configured to search for a known sequence comprising the primary synchronization channel to select a cell and a corresponding sub-frame/symbol timing from the selected cell.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: November 26, 2013
    Assignee: Amosmet Investments LLC
    Inventors: Ulo Parts, Anders Ostergaard Nielsen, Kaj Jansen
  • Patent number: 8588200
    Abstract: A wireless communication system of the present invention achieves improvement of reliability of communication of control data while suppressing the decrease in the communication throughput of data blocks and/or control data. The wireless communication system of the present invention is provided with a base station (1) and a mobile station (2). The mobile station (2) is configured to transmit a plurality of data blocks to the base station (1) at predetermined transmission time intervals. One of the base and mobile stations is configured to generate a plurality of control data used for control of transmission of said plurality of data blocks, to generate a plurality of control messages from said plurality of control data, and to transmit said plurality of control messages to the other of the base and mobile stations.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: November 19, 2013
    Assignee: NEC Corporation
    Inventors: Nahoko Kuroda, Jinsook Lee, Kojiro Hamabe
  • Patent number: 8576961
    Abstract: A method for determining an overlap and add length estimate comprises determining a plurality of correlation values of a plurality of ordered frequency domain samples obtained from a data frame; comparing the correlation values of a first subset of the samples to a first predetermined threshold to determine a first edge sample; comparing the correlation values of a second subset of the samples to a second predetermined threshold to determine a second edge sample; using the first and second edge samples to determine an overlap and add length estimate; and providing the overlap and add length estimate to an overlap and add circuit.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: November 5, 2013
    Assignee: Olympus Corporation
    Inventors: Haidong Zhu, Dumitru Mihai Ionescu, Abu Amanullah
  • Patent number: 8570874
    Abstract: The present invention relates to optical communications and discloses a master clock time synchronization method, slave clock time synchronization method, system and optical network device in a Passive Optical Network (PON) for the purpose of resolving time synchronization in Ethernet over Gigabit PON Encapsulation Method (GEM) mode. The PON master clock time synchronization method includes: predefining a rule for matching packet time stamp generating points; sending a first clock packet carried in a first downstream frame; acquiring time at a packet time stamp generating point that matches the frame data of the first downstream frame at the PON Media Access Control (MAC) layer and regarding the acquired time as the time the first clock packet is sent; and sending a second clock packet in a second downstream frame, where the second clock packet carries the time the first clock packet is sent.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: October 29, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Ruobin Zheng
  • Patent number: 8571150
    Abstract: According to one embodiment, a frequency offset compensation apparatus includes a first estimation unit, a second estimation unit, a setting unit, a synthesis unit and a compensation unit. The first estimation unit estimates a first rotation. The second estimation unit estimates a second rotation. The setting unit sets a weighting factor for the second rotation to a first value if a received power is less than a threshold value, and sets the weighting factor for the rotation to a second value being smaller than the first value if the received power is not less than the threshold value. The synthesis unit calculates a compensation value. The compensation unit compensates for a frequency offset.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: October 29, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Seiichiro Horikawa, Koichiro Ban
  • Patent number: 8565439
    Abstract: A method is provided for detecting scrambling of a radiocommunication network. The method is applied by a radiocommunication circuit capable of being connected to the network by being synchronized on a radiocommunication channel. The method includes a final detection phase, having the following steps: detection of verification of the following final condition: there are N radiocommunication channels on which the radiocommunication circuit cannot be synchronized despite detection of a power level normally sufficient for being synchronized, where N>2; and if the final condition is verified, generation of a final scrambling signal with a probability of scrambling equal to 100%. The method also includes at least one intermediate detection phase, having the following steps: detection of verification of at least one intermediate condition; and if the at least one intermediate condition is verified, generation of an intermediate scrambling signal with a probability of scrambling of less than 100%.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: October 22, 2013
    Assignee: Sierra Wireless
    Inventors: Erwan Girard, Christophe Flechelle, Thierry Lys
  • Patent number: 8562527
    Abstract: A general-purpose, low-cost system provides comprehensive physiological data collection, with extensive data object oriented programmability and configurability for a variety of medical as well as other analog data collection applications. In a preferred embodiment, programmable input signal acquisition and processing circuits are used so that virtually any analog and/or medical signal can be digitized from a common point of contact to a plurality of sensors. A general-purpose data routing and encapsulation architecture supports input tagging and standardized routing through modern packet switch networks, including the Internet; from one of multiple points of origin or patients, to one or multiple points of data analysis for physician review. The preferred architecture further supports multiple-site data buffering for redundancy and reliability, and real-time data collection, routing, and viewing (or slower than real-time processes when communications infrastructure is slower than the data collection rate).
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 22, 2013
    Assignee: Cybernet Systems Corporation
    Inventors: Jeffrey C. Braun, Charles J. Jacobus, Scott Booth, Michael Suarez, Derek Smith, Jeff Hartnagle, Glenn Leprell
  • Patent number: 8532234
    Abstract: The disclosure aims to implement an automatic frequency offset compensation of the frequency between emitter and receiver equipments, in radio frequency modules, with a frequency offset that can be larger than that the receiver can allow, without time loss and extra consumption. To solve this problem, the disclosure provides an automatic frequency offset compensation device comprising a reception front end, at least a filter, an I/Q demodulator for obtaining the I (In Phase) and Q (Quadrature) parameter, an automatic frequency control AFC unit for comparison of a received frequency with the real frequency of the equipment, and a microcontroller and a frequency synthesizer. In this device, the frequency offset is calculated by the AFC unit from the information given by the I/Q demodulator.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: September 10, 2013
    Assignee: Coronis, SAS
    Inventors: Laurent Maleysson, Fabien Bonjour
  • Patent number: 8526554
    Abstract: Apparatus and methods are disclosed, such as those involving deskewing serial data transmissions. One such apparatus includes a plurality of receivers, each of which is configured to receive a serial data stream. Each of the receivers includes a shift register including a plurality of stages arranged in sequence to propagate a stream of characters. Each of the stages is configured to store a character, and shift the character to a next stage in response to a clock signal. The receiver also includes a multiplexer having a plurality of inputs, each of the inputs being electrically coupled to a respective one of the stages of the shift register, and to select one of the stages to generate an output such that the outputs of the multiplexers in the receivers are deskewed.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: September 3, 2013
    Assignee: Analog Devices, Inc.
    Inventor: Michael Hennedy
  • Patent number: 8520787
    Abstract: Apparatus and methods are disclosed, such as those involving deskewing serial data transmissions. One such apparatus includes a plurality of receivers, each of which is configured to receive a serial data stream. Each of the receivers includes a shift register including a plurality of stages arranged in sequence to propagate a stream of characters. Each of the stages is configured to store a character, and shift the character to a next stage in response to a clock signal. The receiver also includes a multiplexer having a plurality of inputs, each of the inputs being electrically coupled to a respective one of the stages of the shift register, and to select one of the stages to generate an output such that the outputs of the multiplexers in the receivers are deskewed.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: August 27, 2013
    Assignee: Analog Devices, Inc.
    Inventor: Michael Hennedy
  • Patent number: 8514920
    Abstract: Methods and apparatus are provided for pseudo asynchronous testing of receive paths in serializer/deserializer (SerDes) devices. A SerDes device is tested by applying a source of serial data to a receive path of the SerDes device during a test mode. The receive path substantially aligns to incoming data using a bit clock. A phase is adjusted during the test mode of the bit clock relative to the source of serial data to evaluate the SerDes device. The source of serial data may be, for example, a reference clock used by a phase locked loop to generate the bit clock. The phase of the bit clock can be directly controlled during the test mode, for example, by a test phase control signal, such as a plurality of interpolation codes that are applied to an interpolator that alters a phase of the bit clock.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: August 20, 2013
    Assignee: LSI Corporation
    Inventors: Christopher J. Abel, Parag Parikh, Vladimir Sindalovsky
  • Patent number: 8509293
    Abstract: A method for estimating timing in a wireless communication comprises the steps of receiving a plurality of symbol bursts corresponding to a plurality of time slots and selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts. The subset comprises a first midamble symbol. The method further comprises the steps of calculating, for each symbol in the subset, a corresponding midamble estimation error, and determining the lowest calculated midamble estimation error to determine a timing for the first symbol burst. The method further comprises the steps of processing the first symbol burst utilizing the timing determined for the first symbol burst, and processing a second symbol burst of the plurality of symbol bursts utilizing the timing determined for the first symbol burst.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: August 13, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Divaydeep Sikri, Erdogan Dede, Farrokh Abrishamkar, Philip J. C. Children, Nico De Laurentiis
  • Patent number: 8498276
    Abstract: A cluster comprises a plurality of end nodes that communicate with one another over at least one communication channel. Each end node is assigned a time slot for transmission of frames; wherein each node comprises a local guardian configured to prevent transmission of timing-related frames sourced from the respective end node. The cluster also comprises a special node that communicates with the plurality of end nodes, wherein the special node establishes a time base and sources timing-related frames to the plurality of end nodes. The transmission schedule includes at least one common scrubbing time slot during which each of the plurality of end nodes is configured to generate a timing-related frame. The special node is configured to determine if the local guardian in any of the plurality of nodes failed to prevent transmission of the respective generated timing-related frame during the common scrubbing time slot.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: July 30, 2013
    Assignee: Honeywell International Inc.
    Inventors: Brendan Hall, Paul F. Dietrich, Kevin R. Driscoll
  • Patent number: 8483161
    Abstract: Methods for transmitting system information, subframe structures, and pilot structures in a wireless access system are disclosed. A method for receiving system information in a wireless access system includes receiving a Network Common Information (NCI) channel including network common system information from a Base Station (BS), receiving a synchronization channel from the BS, for acquiring synchronization with the BS, receiving a Cell Specific Information (CSI) channel including cell specific system information which is specific to the BS from the BS, and decoding the NCI channel and the CSI channel using the synchronization channel. The NCI channel is transmitted over a first frequency channel and the CSI channel is transmitted over a second frequency channel.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: July 9, 2013
    Assignee: LG Electronics Inc.
    Inventors: Bin Chul Ihm, Jeong Ki Kim
  • Patent number: 8477813
    Abstract: In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, a beamforming training (BFT) data unit that conforms to a second format is transmitted, wherein a length of the BFT data unit is shorter than lengths supported by the first format, wherein the BFT data unit is for transmitting PHY beamforming training information. Information to indicate the BFT data unit conforms to the second format is transmitted to a receiving device. The BFT data unit is generated according to the second format, wherein the BFT data unit includes BFT information elements. The BFT data unit is then transmitted to the receiving device.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: July 2, 2013
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Rohit U. Nabar, Manyuan Shen, Songping Wu, Hui-Ling Lou, Yong Liu
  • Patent number: 8477770
    Abstract: The present invention discloses an apparatus to implement a m=n Non-Blocking Minimal Spanning Switch, where n=the total number of data input signals and m=the total number of data output signals and m=the number of crossbar connections in each switch. Data is input to the switch as a plurality of frames, whereby each crossbar connection contains a framer which detects framing patterns in the data. Skewed data is re-aligned and buffered so that the data output by each crossbar connection is equal and identical, thus any crossbar connection may be used to ensure a connection, eliminating the possibility of data interrupts.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: July 2, 2013
    Assignee: Altera Canada Co.
    Inventor: Wally Haas
  • Patent number: 8477673
    Abstract: Providing for retransmission of SFN data, including SFN operated MBMS data, in a manner that preserves synchronization of scheduled SFN transmissions is disclosed herein. As an example, SFN data can be transmitted in a first allocation period, and an un-received or indecipherable SFN data packet associated with the SFN data can be scheduled in a second allocation period. More particularly, the un-received or indecipherable SFN data packet can be allocated to a block of the second allocation period that is scheduled for non-SFN transmission, for instance. Accordingly, SFN retransmission can take place on a cell by cell basis without substantially affecting SFN transmissions synchronized among the cells.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: July 2, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Lorenzo Casaccia, Nathan E. Tenny
  • Patent number: 8472546
    Abstract: A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to each layer, and transmitting the mapping symbols through a plurality of antennas. At least one of the first codeword and the second codeword is mapped to at least 3 layers and the number of layers is larger than 3.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: June 25, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jae Hoon Chung, Hyun Soo Ko, Seung Hee Han, Moon Il Lee
  • Patent number: 8467482
    Abstract: A method for identifying a transmitter in a digital broadcasting system includes: receiving a broadcast signal in which a TxID sequence for identification of a transmitter is embedded; correlating the received broadcast signal with a plurality of elementary code sequences of a pseudo-random sequence sequentially; and identifying the transmitter by using the correlation results.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: June 18, 2013
    Assignees: Electronics and Telecommunications Research Institute, University of Western Ontario
    Inventors: Sung-Ik Park, Heung-Mook Kim, Md. Jahidur Rahman, Xianbin Wang
  • Patent number: 8457090
    Abstract: A wireless communication system of the present invention achieves improvement of reliability of communication of control data while suppressing the decrease in the communication throughput of data blocks and/or control data. The wireless communication system of the present invention is provided with a base station (1) and a mobile station (2). The mobile station (2) is configured to transmit a plurality of data blocks to the base station (1) at predetermined transmission time intervals. One of the base and mobile stations is configured to generate a plurality of control data used for control of transmission of said plurality of data blocks, to generate a plurality of control messages from said plurality of control data, and to transmit said plurality of control messages to the other of the base and mobile stations.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: June 4, 2013
    Assignee: NEC Corporation
    Inventors: Nahoko Kuroda, Jinsook Lee, Kojiro Hamabe
  • Patent number: 8457672
    Abstract: Wireless client devices within a wireless network exchange data with other wireless devices during particular time slots determined by the network. More particularly, the system generates and wirelessly broadcasts synchronization information to the client devices, where the synchronization information contains individual masks to be applied to bit fields of individual client devices, where said time slots are determined in accordance with the masked bit fields. In such a manner, client devices can be coordinated to communicate with the system in a dynamic real-time tiered manner.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: June 4, 2013
    Assignee: Proxense, LLC
    Inventors: David L. Brown, Fred S. Hirt
  • 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: 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: 8422518
    Abstract: A method of transmitting audio data across a digital interface is provided. The method includes receiving audio data, organized as a plurality of audio samples. At least one of the plurality of audio samples may be placed into a data packet. The data packet may be transmitted during a valid transmission interval if the data packet is full or during a valid transmission interval in response to receiving a packet send event.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: April 16, 2013
    Assignee: Integrated Device Technology, inc.
    Inventors: Zhiyong Guan, Xiaoqian Zhang, Qi Li
  • 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: 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
  • 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: 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: 8385338
    Abstract: In at least some embodiments, a multicast communication system includes sender and a plurality of receivers in communication with the sender. The sender is configured to multicast a data packet to the plurality of receivers. The plurality of receivers are configured to acknowledge the data packet received from the sender based on weakest member selection without a sender-side competitive time window.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: February 26, 2013
    Assignee: Futurewei Technologies, Inc.
    Inventors: Ming Li, Renwei Li, Weiqian Dai, Su Wei, Xuesong Dong
  • Patent number: RE44351
    Abstract: A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: July 9, 2013
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Young Woo Yun, Hyun Hwa Park, Hyun Woo Lee, Dong Cheol Kim