Synchronization Information Is Distributed Over Multiple Frames Patents (Class 370/510)
  • Patent number: 10320507
    Abstract: A method determines a propagation time of a message in a communication network. The message is transmitted from a first network component to a second network component along a communication connection, and the first network component detects a transmission time of the message and stores the corresponding transmission time information. The propagation time is determined using the transmission time information. The aim is to improve the accuracy when determining the propagation time. This is achieved in that the second network component returns the message to the first network component immediately after the message is encountered in the second network component. The first network component detects a reception time upon receiving the returned message and stores corresponding reception time information of the message. The propagation time of the message along the communication connection is determined using the transmission time information of the message and the reception time information of the message.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: June 11, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Holger Heine
  • Patent number: 10225809
    Abstract: This disclosure provides a device and method of aligning a transmission frame in a Time Division Duplexing network, wherein the transmission frame includes a sequence of units separated by transition points, wherein each unit includes one or more resource slots in a transmission direction, the method comprising: allocating a transmit power level to a plurality of resource slots in a unit, wherein a transmit power for a first resource slot of the plurality of resource slots is greater than the transmit power for a second resource slot of the plurality of resource slots; measuring the transmit power of a TDD transmission received from an external node to determine a peak transmit power of the received TDD transmission; and substantially aligning the first resource slot to coincide with the peak transmit power of the received TDD transmission.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: March 5, 2019
    Assignee: British Telecommunications Public Limited Company
    Inventors: Richard Mackenzie, Anvar Tukmanov, Michael Robert Fitch, Andrew James Garrett, Colin John Harrold
  • Patent number: 10216596
    Abstract: Embodiments of the invention provide a system and method to vastly improve the remote write latency (write to remote server) and to reduce the load that is placed on the remote server by issuing auto-log (automatic log) writes through an integrated networking port in the SSD (solid state drive). Embodiments of the invention also provide a system and method for a PCI-e attached SSD to recover after a failure detection by appropriating a remote namespace.
    Type: Grant
    Filed: December 31, 2016
    Date of Patent: February 26, 2019
    Assignee: BiTMICRO Networks, Inc.
    Inventor: Bharadwaj Pudipeddi
  • Patent number: 10103806
    Abstract: A light weight transmission device providing an identification signal is disclosed. In one aspect, the device comprises a gating device for controlling the transfer of information to the transmitter, a data retaining device, in communication with the gating device, receiving and storing the information for a known period of time, and a controller, in communication with the gating device, providing a signal to the gating device to enable transfer of the retained information to the transmitter at a known time and for a known period of time.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: October 16, 2018
    Assignee: BINJ Laboratories, Inc.
    Inventor: Joseph S. Noonan
  • Patent number: 10034070
    Abstract: An array of columns and rows of host server devices is mounted in a row of racks. Each device has a host processor and an exact-match packet switching integrated circuit. Packets are switched within the system using exact-match flow tables that are provisioned by a central controller. Each device is coupled by a first cable to a device to its left, by a second cable to a device to its right, by a third cable to a device above, and by a fourth cable to a device below. In one example, substantially all cables that are one meter or less in length are non-optical cables, whereas substantially all cables that are seven meters or more in length are optical cables. Advantageously, each device of a majority of the devices has four and only four cable ports, and connects only to non-optical cables, and the connections involve no optical transceiver.
    Type: Grant
    Filed: September 6, 2015
    Date of Patent: July 24, 2018
    Assignee: Netronome Systems, Inc.
    Inventor: J. Niel Viljoen
  • Patent number: 9960873
    Abstract: A pluggable transceiver module (200) comprising a line receiver (208) connected to a unit interface transmitter (202), a line transmitter (206) connected to a unit interface receiver (204) and a timestamp counter (210) adapted to generate counter values based on clock signals received from an external source and to send the counter values to the line transmitter (206) and to the line receiver (208). The line transmitter (206) and the line receiver (208) are adapted to associate timing packets in a stream of data packets transmitted and received by the pluggable transceiver module (200) with counter values output by the timestamp counter (210).
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: May 1, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Qingfeng Yang, Francesco Pasio, Zhendong Lei, Stefano Ruffini
  • Patent number: 9804944
    Abstract: Disclosed is a data processing system that permits the analysis of software in the entire data processing system even when it is configured so that a plurality of control modules is dispersively installed at remote places. In the data processing system formed of the control modules, the control modules each include a timer that counts time common to the entire data processing system, and a time synchronization process is employed to synchronize time information derived from the timer in a low-level control module with time information derived from the timer in a high-level control module. The data processing system incorporates a log acquisition function that not only acquires a log but also adds a timestamp based on timer time to the acquired log during, for example, an application process.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: October 31, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Hisashi Hata
  • Patent number: 9767105
    Abstract: A method of managing data for at least one wireless communication network and a data management system for implementing such a method are provided. The method comprises determining at least one free space metric for at least one data storage device and comparing the at least one determined free space metric for the at least one data storage device to at least one threshold value. If the at least one determined free space metric for the at least one data storage device exceeds the at least one threshold value, the method further comprises identifying data object groups represented by data objects stored within the at least one data storage device, determining a retention priority value for each identified data object group, determining at least one data object group for which to retire data objects based at least partly on the determined retention priority values, and retiring data objects within the determined at least one data object group from the at least one data storage device.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: September 19, 2017
    Assignee: Viavi Solutions UK Limited
    Inventors: Nicholas James Randell, Peter Kenington, Christopher Drawater
  • Patent number: 9699751
    Abstract: Systems and methods for measuring end-to-end data path delays between a Radio Equipment Controller (REC) and a Radio Equipment (RE) of a base station are disclosed. In one embodiment, a system includes a RE configured to transmit a chirped sine wave signal from the RE to a REC on an uplink data path from the RE to the REC. The REC is configured to correlate a reference chirped sine wave signal and a received signal from the RE, where the received signal includes the chirped sine wave signal. The REC is further configured to determine an uplink data path delay from the RE to the REC based on results of the correlation of the reference chirped sine wave signal and the received signal from the RE on the uplink data path. In another embodiment, a downlink data path delay is measured in a similar manner.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: July 4, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Robert Griffioen
  • Patent number: 9602850
    Abstract: A method includes receiving a video content metadata entry. The method also includes accessing video content metadata validation rules. The method further includes determining whether the video content metadata entry is valid based on the video content metadata validation rules. The video content metadata entry is reported as a valid video content metadata entry in response to a determination that the video content metadata entry is valid. The method also includes reporting the video content metadata entry as an invalid video content metadata entry in response to a determination that the video content metadata entry is invalid.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: March 21, 2017
    Assignee: VERIZON PATENT AND LICENSING INC.
    Inventors: Yuhui Qian, Jianxiu Hao, Zhiying Jin
  • Patent number: 9602827
    Abstract: A video processing device can be configured to process one or more initial syntax elements for a parameter set associated with a video bitstream; receive in the parameter set an offset syntax element for the parameter set that identifies syntax elements to be skipped within the parameter set; and based on the offset syntax element, skip the syntax elements within the parameter set and process one or more additional syntax elements in the parameter set that are after the skipped syntax elements in the parameter set.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: March 21, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Ying Chen, Ye-Kui Wang
  • Patent number: 9554347
    Abstract: A method and system for measuring end-to-end processing delay of the RE between an input interface and a transmit port in the downlink direction and a receive port and an output interface on the uplink direction is disclosed. The method and system if for use in a radio equipment node (RE) connected to a radio equipment control node (REC). Once the downlink and uplink radio channels are activated at a predetermined carrier frequency, a chirp sine wave is added at the input interface and the receive port such that the chirp sine wave becomes mixed with the carrier frequency. Sampling of a received downlink mixed signal is done at the transmit port and of the received uplink mixed signal at the output interface. The sampled mixed signals are then cross-correlated with a reference chirped sine wave to obtain a signal phase shift which is then converted to obtain a time delay associated with the end-to-end processing delay of the RE.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: January 24, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Robert Griffioen
  • Patent number: 9503253
    Abstract: Transmission circuit for transmitting serial data with superposed clock signal includes encoder to scramble parallel data of information and apply predetermined coding scheme to generate D symbols having clock signal embedded therein, and to output alternately continuous predetermined number of the D symbols and one of K symbols as synchronization control codes for the scrambling; and parallel-to-serial converter configured to convert the D symbols and the K symbols output from the encoder into serial data, wherein, for each period of the scrambling, the encoder outputs K symbols, each of which is allocated to one of the first code indicating beginning of the period of the scrambling, the second code allocated at equal interval among remaining ones of the K symbols other than that for the first code, and a third code allocated among remaining ones of the K symbols other than those for the first code and the second code.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: November 22, 2016
    Assignee: ROHM CO., LTD.
    Inventor: Shinichi Saito
  • Patent number: 9473280
    Abstract: A telecommunications system communicating data to/from one or more terminals and a network, including one or more transmitters operable to transmit first and second carriers over respective first and second frequency bandwidths. During a first time period the transmitters can transmit data receivable by first and second classes of terminals on the first and second carriers. During a second different time period, the transmitters can transmit data to the second terminal class on the first and second carriers in combination. A data transmission format on the first carrier is incompatible with a user data transmission format on the second carrier, during the first time period, and the transmitters can transmit control data on the first carrier in the first time period receivable by the second terminal class to enable the second terminal class to maintain synchronization with the first carrier during the first time period.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: October 18, 2016
    Assignee: SCA IPLA HOLDINGS INC.
    Inventors: Peter Darwood, Martin Beale
  • Patent number: 9402276
    Abstract: A light weight transmission device providing an identification signal is disclosed. In one aspect, the device comprises a gating device for controlling the transfer of information to the transmitter, a data retaining device, in communication with the gating device, receiving and storing the information for a known period of time, and a controller, in communication with the gating device, providing a signal to the gating device to enable transfer of the retained information to the transmitter at a known time and for a known period of time.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: July 26, 2016
    Assignee: Binj Laboratories, Inc.
    Inventors: Joseph S. Noonan, James P. Noonan, Barry Nadler, Jules Insler
  • Patent number: 9391824
    Abstract: Transmission timing of a random access preamble in an uplink carrier of a carrier group being determined employing a synchronization signal transmitted on a downlink carrier of the carrier group. The wireless device receives a time alignment command from the base station. The time alignment command comprises a time adjustment value and an index identifying the carrier group. The wireless device applies the time adjustment value to uplink signals transmitted on all activated uplink carriers in the carrier group.
    Type: Grant
    Filed: March 2, 2014
    Date of Patent: July 12, 2016
    Assignee: Ofinno Technologies, LLC
    Inventor: Esmael Hejazi Dinan
  • Patent number: 9378176
    Abstract: The present invention relates to methods and apparatus for data transfer. A data interface is described with at least a first data terminal for either outputting or receiving a data signal. In bi-directional embodiments there may be one terminal for receiving data and one terminal for outputting data. A bit clock terminal outputs or receives a bit clock signal; and a frame clock terminal for outputs or receives a frame clock signal. Interface control circuitry is configurable to associate data outputted or received in each frame with time slots (1-8) of a predetermined number of bits (x, y, z) wherein the control circuitry is adapted such that the frequency of the bit clock signal can be changed at any time so as to vary the number of time slots in a frame.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: June 28, 2016
    Assignee: Cirrus Logic International Semiconductor Ltd.
    Inventors: Robert James Hatfield, Gordon Richard McLeod, John Laurence Pennock
  • Patent number: 9292021
    Abstract: Disclosed are exemplary embodiments of systems and methods to communicate data over at least one wire line between units each associated with a control system. In an exemplary embodiment, a conditioned input AC signal serves as a reference signal for data to be transmitted. In phase or out of phase state of the conditioned reference signals is determined by dividing the reference signal into predetermined number of segments, generating a template signal frame and a data signal frame at predetermined segments, generating an interrupt signal in each control system on a predetermined location on the reference signal, logically ORing the template and data signal frames, transmitting the ORed signal, and analyzing the ORed signal to determine phase of the reference signal provided to each control system. If the reference signal is out of phase, the interrupting signal is shifted to correct the out of phase state of the reference signal.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: March 22, 2016
    Assignee: Emerson Electric Co.
    Inventor: Rajan Joshi
  • Patent number: 9262393
    Abstract: In accordance with embodiments, there are provided mechanisms and methods for providing simplified form filling in an on-demand service in a database system. These mechanisms and methods can enable embodiments to provide users with an efficient form wizard for filling electronic forms. The ability of embodiments to provide a form wizard can enable users to efficiently accomplish the rapid filling of multiple forms without the need to scroll through the electronic forms and entering the same information repeatedly.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: February 16, 2016
    Assignee: salesforce.com, inc.
    Inventor: Nadia Naderi
  • Patent number: 9154861
    Abstract: The present invention relates to method for synchronizing time, apparatus and system. The method discloses an OLT generates a Passive Optical Network (PON) downstream frame from to an Optical Network Unit (ONU), wherein the PON downstream frame comprises a time synchronization message based on Ethernet protocol, wherein the time synchronization message comprises a time value that is referenced to a PON Media Access Control (MAC) control layer and that indicates the ONU to adjust a time of a clock coupled to the ONU; and send the PON downstream frame.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: October 6, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Ruobin Zheng
  • Patent number: 9094904
    Abstract: A method for wireless communication is disclosed. A time alignment timer is started. It is determined when the time alignment timer will expire. A time alignment request subframe that is prior to the time alignment timer expiring is identified. Uplink time alignment is requested in the time alignment request subframe.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: July 28, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Vasanth Kumar Ramkumar, Srinivasan Rajagopalan, Bao Vinh Nguyen, Deepak Krishnamoorthi
  • Patent number: 9046592
    Abstract: Systems and techniques for determining the location of user equipment (UE) in a wireless network are disclosed. These techniques leverage geometric calculations for an overlaid local bin grid framework mapping an area of a wireless network to stored differential values for each frame of the local bin grid framework for pairs of relevant NodeB radios. A timing offset can be determined, such that when a time value from the UE is accessed, the location can be quickly determined with minimal real time computation. In an aspect, the UE time value can be searched for in the pre-computed differential value data set indexed by a relevant NodeB radio pair to return a set of frames that can be intersected with a second set of frames for a second NodeB radio pair for the UE. The intersecting frames can represent the location of the UE in the wireless network.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: June 2, 2015
    Assignee: AT&T MOBILITY II LLC
    Inventors: Sheldon Kent Meredith, Mark Austin, Jeremy Fix
  • Patent number: 9014213
    Abstract: Under a wireless communication environment in which nodes sharing a time reference communicate information with a frame having a predetermined structure, when a node that has failed to acquire synchronization, a protocol in which neighboring nodes relays synchronization to the synchronization acquisition failed node by using a preamble defined in the frame is provided.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: April 21, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Choongil Yeh, Dong Hyun Ahn
  • Patent number: 9003038
    Abstract: Applications executed out of router memory may acquire additional bandwidth that is not being used by other applications, in order to speed up network traffic. Scavenging may occur up to a point where current congestion is detected, at which point any scavenged bandwidth is relinquished and the application returns to its prescribed limit. After current congestion is mitigated, scavenging may occur up to a limit below the point where congestion was detected. After a predetermined interval, additional scavenging may occur beyond this limit until a preset bandwidth limit is reached.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: April 7, 2015
    Assignee: QLOGIC, Corporation
    Inventor: Charles Micalizzi, Jr.
  • Patent number: 8995472
    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: January 13, 2014
    Date of Patent: March 31, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Erez Haba
  • Patent number: 8982974
    Abstract: Receiver synchronization techniques (RST), contributing more accurate synchronization of receiver clock to OFDM composite frame combined with much faster acquisition time and better stability of the receiver clock, and phase and frequency recovery techniques, comprising a software controlled clock synthesizer (SCCS) for high accuracy phase & frequency synthesis producing synchronized low jitter clock from external time referencing signals or time referencing messages wherein SCCS includes a hybrid PLL (HPLL) enabling 1-50,000 frequency multiplication with very low output jitter independent of reference clock quality.
    Type: Grant
    Filed: February 10, 2013
    Date of Patent: March 17, 2015
    Inventor: John W Bogdan
  • Patent number: 8982998
    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: March 3, 2014
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
  • Patent number: 8971305
    Abstract: Systems and methodologies are described that facilitate scrambling of downlink reference signals utilizing a pseudo-random sequence (PRS) corresponding to a primary synchronization code (PSC) and secondary synchronization code (SSC) combination. Utilization of the combination allows for orthogonal sequencing to be removed from the scrambling. This can be beneficial, for example, where resources required for orthogonalizing the reference signal outweigh the benefit of utilizing the orthogonal sequences. In such scenarios, selective scrambling can be utilized such that the orthogonal sequence or instead the PSC/SSC combination can be provided to leverage advantages of both mechanisms in the given scenarios.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: March 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Durga Prasad Malladi, Juan Montojo
  • Patent number: 8958442
    Abstract: A communication system includes a plurality of communication stations arranged to respectively transmit a beacon on which beacon time information related to a beacon received from a peripheral communication station is placed at a predetermined transmission interval and control a beacon transmission timing of its own station while a collision with the beacon transmitted from the peripheral communication station is avoided on the basis of beacon information placed on the received beacon, in which at least a part of the communication stations includes means configured to decide a priority with respect to beacons received from at least one peripheral communication station and means configured to place beacon time information of a beacon having a high priority among the received beacons on a beacon of its own station, and transmits the beacon at a predetermined transmission interval.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: February 17, 2015
    Assignee: Sony Corporation
    Inventor: Kazuyuki Sakoda
  • Patent number: 8948294
    Abstract: Present document is related with communication of synchronization signals between base station and terminal. The base station acquires a primary synchronization signal generated using a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence having a root index M and having a length L, and a secondary synchronization signal informing a cell group ID. And, the base station transmits the primary synchronization signal at a last symbol of a specific time domain unit to one or more terminals, and the secondary synchronization signal at a second-to-last symbol of the specific time domain unit to the one or more terminals. Here, the root index M is one among a root index set comprising m0 and m1 meeting “m0+m1=(½*L)*n” or “m0?m1=±(½*L)*n”, where ‘n’ is an integer greater than 0.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: February 3, 2015
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
  • Patent number: 8934583
    Abstract: Systems, methods, and other embodiments associated with detecting an event are described. According to one embodiment, a device includes a detect logic that is configured to, during a sample window, monitor a communication channel for an event in a signal, wherein monitoring the communication channel for the event includes incrementing a counter in response to a magnitude of the communication channel being greater than a first predetermined threshold, and provide a detection signal in response to the counter reaching a second predetermined threshold, wherein the detection signal indicates detection of the event in the signal.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: January 13, 2015
    Assignee: Marvell International Ltd.
    Inventors: Yihong Qi, Hongyuan Zhang
  • Patent number: 8923346
    Abstract: A time synchronization method includes: after sending a synchronization message to the opposite end, sending a following message where an ending time for sending the synchronization message is recorded; receiving a delay request message sent by the opposite end, and sending a delay response message where the initial time for receiving the delay request message is recorded; receiving the synchronization message and the following message, and recording the initial time for receiving the synchronization message and the ending time recorded in the following message for sending the synchronization message; sending a delay request message, and recording an ending time for sending the delay request message; receiving a delay response message, and recording an initial time recorded in the delay response message for the opposite end to receive the delay request message; calculating the time offset value between the two ends, and completing time synchronization.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: December 30, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bingbo Li, Long Jiang, Wenguang Xu, Wenhua Sun, Yuanxin Xu, Shumin Chen, Yang Wang, Chuangang Wang
  • Patent number: 8923347
    Abstract: In a data transmission system, a first node receives at least two sets of input data signals including at least two signals being based on different synchronization sources. The first node extracts a respective clock signal representing the embedded clock signals from the sources, samples and formats these signals for transmission according to a TDM structure. The TDM formatted signals are transmitted as at least one bit stream over a transmission medium to at least one second node, where the bit stream is demultiplexed into at least two sets of output data signals respective demultiplexed clock signals representing the sampled clock signals. A jitter attenuating mechanism reduces an amount of frequency jitter to below a predefined level to produce a respective clock signal having a synchronization quality superior to that of the demultiplexed clock signals. An interface module recombines each data signal with its associated clock signal.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: December 30, 2014
    Assignee: Transmode Systems AB
    Inventor: Gunnar Forsberg
  • Patent number: 8867681
    Abstract: A transmission system which couples a plurality of transmission devices to a control device includes a first transmission device which is one of the plurality of transmission devices; a first calculation circuit which calculates a first difference value indicating a frequency difference value between a common clock supplied from the control device and a first clock as a clock used in the first transmission device; and a transmitter which reports the first difference value to a second transmission device other than the first transmission device, wherein the second transmission device comprises: a second calculation circuit which calculates a second difference value indicating a frequency difference value between the common clock and a second clock used in the second transmission device, and a frequency controller which controls an oscillator generating the second clock so that the second difference value approaches the first difference value reported from the first transmission device.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: October 21, 2014
    Assignee: Fujitsu Limited
    Inventor: Hiroshi Yoshida
  • Patent number: 8867569
    Abstract: A beamforming training (BFT) data unit for transmission via a communication channel in a wireless personal area network is generated, and in particular, is for transmitting beamforming training information. A physical layer header and first BFT data are encoded using block encoding to generate a first block. Second BFT data are encoded using block encoding to generate a second block. The BFT data unit is generated with a fixed-length payload, such that the BFT data unit includes only i) a preamble, ii) the first block, and iii) the second block.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: October 21, 2014
    Assignee: Marvell World Trade Ltd
    Inventors: Hongyuan Zhang, Rohit U. Nabar, Manyuan Shen, Songping Wu, Hui-Ling Lou, Yong Liu
  • Patent number: 8861501
    Abstract: A timing source is provided for sending timing information via a packet network. The source comprises a first clock for generating the timing information and a packet forming section for forming a sequence of packets. An output section in the form of a packet launch control section transmits the packets via the network as packet bursts, each of which comprises a plurality of packets with the intervals between consecutive packets of each burst being less than the intervals between consecutive packets. A time-stamping section inserts into each packet a transmission time derived from the timing information generated by the clock.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: October 14, 2014
    Assignee: Microsemi Semiconductor Limited
    Inventors: Martin Richard Crowle, Timothy Michael Edmund Frost, Robertius Laurentius Van Der Valk
  • Patent number: 8824612
    Abstract: Apparatuses, circuits, and methods are disclosed for reducing or eliminating unintended operation resulting from metastability in data synchronization. In one such example apparatus, a sampling circuit is configured to provide four samples of a data input signal. A first and a second of the four samples are associated with a first edge of a latching signal, and a third and a fourth of the four samples are associated with a second edge of the latching signal. A masking circuit is configured to selectively mask a signal corresponding to one of the four samples responsive to the four samples not sharing a common logic level. The masking circuit is also configured to provide a decision signal responsive to selectively masking or not masking the signal.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: September 2, 2014
    Assignee: Micron Technology, Inc.
    Inventor: Yantao Ma
  • Patent number: 8811433
    Abstract: A method for uplink synchronization in a multi-carrier system includes the following steps: a base station selects one or more first component carriers, which do not establish the uplink synchronization with the base station, from multiple component carriers supported by a terminal; then the base station obtains Timing Advance (TA) needed by the terminal to perform the uplink transmission on the first component carriers, and sends the TA information to the terminal; the terminal performs the uplink transmission on said first component carriers according to said TA. The application of the present invention enables the establishment of uplink synchronization between the base station and the user equipment in multi-carrier system.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: August 19, 2014
    Assignee: China Academy of Telecommunications Technology
    Inventors: Yali Zhao, Fangli Xu, Fei Qin, Guoqing Li
  • Patent number: 8804892
    Abstract: A clock and data recovery device receives a serial data stream and produces recovered clock and data signals. The clock and data recovery device operates over a range of frequencies and without use an external reference clock. A first loop supplies a first clock signal to a second loop. The second loop modifies the first clock signal to produce the recovered clock signal and uses the recover clock signal to produce the recovered data signal. The first loop changes the frequency of the first clock signal based on frequency comparison and data transition density metrics.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 12, 2014
    Assignee: Vitesse Semiconductor Corporation
    Inventor: Ian Kyles
  • Patent number: 8804772
    Abstract: A base station transmits on a first control channel first scheduling information for a control message. First radio resources of the first control channel start from the first symbol of each subframe in a plurality of subframes. The base station transmits the control message configuring second radio resources of a second control channel. The second radio resources comprise resource blocks in a subset of subframes in the plurality of subframes. The control message indicates the subset of subframes and a starting symbol of the second control channel. The base station transmits second scheduling information on the second control channel.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: August 12, 2014
    Assignee: Ofinno Technologies, LLC
    Inventor: Esmael Hejazi Dinan
  • Patent number: 8804768
    Abstract: Exact data-rate analysis of the information signal portions to be transmitted in a subsequent transmission cycle per time-division multiplexing process shall be initially omitted. Instead, on the basis of highly accurate estimated values for the subsequent data rates, estimated values for relative waiting times are transmitted, in a current transmission cycle, from the current time slice to the subsequent time slice of the same service. In the subsequent transmission cycle, actual data rates may be set which may deviate from the estimated data rates for the individual information signals, as a result of which predicted time-slice boundaries for the subsequent transmission cycle may shift. However, the potential shift in the time-slice boundaries is subject to several boundary conditions. No time slice of the subsequent transmission cycle can start prior to its signaled estimated starting time. With constant data rates, the estimated time-slice structure and the actual time-slice structure are identical.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: August 12, 2014
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Friedrich-Alexander-Universitaet Erlangen-Nuernberg
    Inventors: Christian Forster, Andreas Mull, Stefan Doehla, Heinz Gerhaeuser, Albert Heuberger
  • Patent number: 8787272
    Abstract: A method (400) for creating a group shared distributed reservation in a wireless network. The method comprises collecting information about the distributed reservation availabilities of devices in the wireless network (S410); selecting a group of shared devices to be included in the group shared distributed reservation based on the collected information (S420); sending a reservation request to each device in the group of shared devices (S430); and updating the group of shared devices to include only devices that accept the reservation request (S460), thereby creating a group shared distributed reservation of medium access time slots.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: July 22, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: Hongqiang Zhai
  • Patent number: 8781086
    Abstract: A digital subscriber line (DSL) unit comprises a first user port configured to communicate signals according to an Ethernet protocol and a second user port configured to communicate signals according to a second non-Ethernet protocol The DSL unit also comprises at least one DSL port configured to communicate signals according to a DSL protocol; and a processing device configured to analyze Ethernet signals received over the first user port to determine when to output data from the respective received Ethernet signals over the second user port and when to output data from the respective received Ethernet signals over the at least one DSL port. The processing device is further configured to extract data from signals received over the second user port and insert the extracted data into a corresponding Ethernet signal having a respective emulated circuit identification and to output the corresponding Ethernet signal over the first user port.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 15, 2014
    Assignee: ADC DSL Systems, Inc.
    Inventors: Joseph Polland, Laxman Anne, Clifton Powers, Manish Kumar Sharma
  • Patent number: 8781036
    Abstract: A system including an input module, a first gain module, a second gain module, and a preamble estimation module. The input module is configured to receive an input signal from a station. The input signal includes (i) a first preamble sequence, and (ii) subcarriers. The first gain module is configured to, based on the input signal, generate first channel gain values. Each of the first channel gain values is for a respective one of the subcarriers. A second gain module is configured to, based on the first channel gain values, generate second channel gain values. A preamble estimation module is configured to estimate the first preamble sequence based on (i) the first channel gain values, and (ii) the second channel gain values.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: July 15, 2014
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Hui-Ling Lou
  • Patent number: 8730855
    Abstract: A method for detecting a channel in a mixed-mode communications system is presented. The channel contains a primary synchronization pattern in a predetermined location within the channel. The primary synchronization pattern is compared against different predetermined channel synchronization patterns to detect a channel. Upon detection of the channel, a look-back channel detector confirms the existence of the channel by using the location of the primary synchronization pattern. Detection and confirmation of the channel may be employed simultaneously to each channel of a multiple-channel direct mode of operation signal. Audio holes may be eliminated in a 2:1 TDMA direct mode operation where both time slots contain signals from two different originating communication devices and the signals have different priority.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: May 20, 2014
    Assignee: Motorola Solutions, Inc.
    Inventors: Hun Weng Khoo, Yueh Ching Chung, David G. Wiatrowski
  • Patent number: 8717972
    Abstract: The present invention provides a method for range extension is wireless communication systems. One embodiment of the method includes determining whether a mobile unit is within a first range corresponding to a range of timing advances supported by a timing advance command. This embodiment also includes transmitting a plurality of timing advance commands to the mobile unit when the mobile unit is outside the first range so that the mobile unit can synchronize with the base station by combining information in the plurality of timing advance commands.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: May 6, 2014
    Assignee: Alcatel Lucent
    Inventors: Fang-Chen Cheng, Jung Ah Lee
  • Patent number: 8711990
    Abstract: A system including a demodulation module, a metric generation module, and a preamble detection module. The demodulation module is configured to generate demodulated signals based on demodulating, in accordance with a differential demodulation scheme, signals received from a base station. The signals received from the base station include a plurality of symbols. The demodulated signals comprise a plurality of real parts each having a corresponding magnitude. The metric generation module is configured to generate a plurality of metrics for the plurality of symbols based on the corresponding magnitudes of the plurality of real parts of the demodulated signals. The preamble detection module is configured to detect, based on the plurality of metrics, whether the plurality of symbols in the signals received from the base station includes a preamble symbol.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: April 29, 2014
    Assignee: Marvell International Ltd.
    Inventors: Jungwon Lee, Qing Zhao
  • Patent number: 8711836
    Abstract: Apparatus and methods relating to synchronization of communication equipment are disclosed. Synchronization information received from a bonded communication link can be used to synchronize local and/or remote communication equipment, such as femtocell sites coupled to nodes in a ring network. This may involve isolating a frequency reference signal from a DSL (Digital Subscriber Line) communication link which is a constituent link of a bonded communication link, for example. In a ring network, received synchronization information could be used in synchronizing a locally connected installation of communication equipment, and passed for transmission in the ring network for synchronizing other communication equipment. Such dropping and passing of an analog frequency reference signal could be applied in networks having other topologies as well. At least some embodiments of the invention are applicable to optical links.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: April 29, 2014
    Assignee: Genesis Technical Systems Corp.
    Inventors: Stephen P. Cooke, Tino Zottola
  • Patent number: 8705579
    Abstract: A data Interface for transferring digital data between a host and a client over a communication path using packet structures linked together to form a communication protocol for communicating a pre-selected set of digital control and presentation data. The signal protocol is used by link controllers configured to generate, transmit, and receive packets forming the communications protocol, and to form digital data into one or more types of data packets, with at least one residing in the host device and being coupled to the client through the communications path. The interface provides a cost-effective, low power, bi-directional, high-speed data transfer mechanism over a short-range “serial” type data link, which lends itself to implementation with miniature connectors and thin flexible cables which are especially useful in connecting display elements such as wearable micro-displays to portable computers and wireless communication devices.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: April 22, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Jon James Anderson, Brian Steele, George Alan Wiley, Shashank Shekhar
  • Patent number: 8705656
    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: April 18, 2013
    Date of Patent: April 22, 2014
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka