Using Synchronization Information Contained In A Frame Patents (Class 370/509)
  • Patent number: 8601345
    Abstract: A method and apparatus for enhancing frame alignment using cyclic redundancy check (“CRC”) corrections are disclosed. In one embodiment, a process of frame alignment searches a predefined bit pattern within a first multi-frame structure and provides an assumed frame boundary after identifying the predefined bit pattern in the first multi-frame structure. While calculating a CRC value in response to the assumed frame boundary, the process further corrects the CRC value in accordance with a saved residue and F-bits identified by the assumed frame boundary. The assumed frame boundary is subsequently verified by comparing the calculated CRC value with embedded CRC value obtained from a second multi-frame structure.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: December 3, 2013
    Assignee: Tellabs Operations, Inc.
    Inventor: Shuo Huang
  • Patent number: 8599881
    Abstract: A system and method for redundant synchronizing to a reference clock for data communications. A determination is made whether a first data stream and a second data stream are available. The first data stream and the second data stream are received through opposing directions of a communications ring. A first data packet and second data packet are received at a remote node in response to the first data stream and second data stream being available. A timing characteristic of the first data packet and the second data packet correspond to a tick of a reference clock. The tick of the reference clock is extracted utilizing a timing characteristic of the first data packet or second data packet in response to the first data stream or the second data stream being available. A secondary clock is disciplined with the reference clock by adjusting the secondary clock based on a difference between times measured by the reference clock and the secondary clock to generate a clock signal.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: December 3, 2013
    Assignee: CenturyLink Intellectual Property LLC
    Inventors: Gregory A. Wolfe, Michael Bugenhagen
  • Patent number: 8594962
    Abstract: A technique includes determining a first difference between a time that a first network element of a seismic acquisition network receives a first frame pulse from a second network element of the seismic acquisition network and a time that the first network element transmits a second frame pulse to the second network element. The technique includes determining a second difference between a time that the second network element receives the second frame pulse and a time that the second network element transmits the first frame pulse. The technique includes determining a transmission delay between the first and second network elements based on the first and second time differences.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: November 26, 2013
    Assignee: WesternGeco L.L.C.
    Inventor: Geir A. M. Drange
  • Patent number: 8588613
    Abstract: Systems, methods, and computer-readable media for propagating a timing signal over a Dense Wave Division Multiplexer fiber optic network by polarity modulation of the Optical Service Channel are provided. The systems, methods, and computer-readable media may make the timing signal available for use by devices that require a reference timing source.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: November 19, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Stephen H. Culpepper
  • Patent number: 8582437
    Abstract: A system and method for increasing input/output speeds in a network switch. A physical layer device is provided that includes a physical coding sublayer that insert data flow identifiers to data flows that are provided to a gearbox. In one embodiment, the gearbox is a 5 to 2 gearbox that can transport various combinations of 10 G/40 G data flows over a narrower interface to a second physical layer device having an inverse gearbox.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: November 12, 2013
    Assignee: Broadcom Corporation
    Inventors: Ali Ghiasi, Velu Pillai, Sundar Chidambara
  • 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: 8571014
    Abstract: A system handles timing information within a packet-switched network. The system classifies packets for processing depending on the packet type. After classification, a new timestamp value may be produced depending on the packet classification. The new timestamp value may use a timestamp value from the received packet, a value from a local clock, and an offset value. The timestamp value may be written into the packet, depending on the packet classification, and checksum-type fields may additionally be updated in the packet. In some embodiments, multiple physical layer circuits are integrated with a local clock circuit.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: October 29, 2013
    Assignee: Vitesse Semiconductor Corporation
    Inventors: Thomas Kirkegaard Joergensen, Brian Branscomb, Kristian Ehlers
  • Patent number: 8571070
    Abstract: Certain aspects of a method and system for speed negotiation for twisted pair links in fiber channel systems are disclosed. Aspects of a method may include communicating data between fiber channel host devices communicatively coupled via a twisted pair link based on a common speed negotiated between the fiber channel host devices. At least one available speed may be determined for the communication of data between the fiber channel host devices over the twisted pair link. The determined available speeds for each of the fiber channel host devices may be exchanged via at least one fast link pulse signal. The common speed negotiated may be a highest available speed for the communication of data between the fiber channel host devices.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: October 29, 2013
    Assignee: Broadcom Corporation
    Inventors: Ali Ghiasi, Kevin Brown
  • 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: 8570869
    Abstract: Systems, methods and computer program codes are provided to facilitate error detection and timing synchronization of scalable data transmissions. To this end, checksum error detection is applied to the core layer and enhancement layers of the scalable payload data in such a way that dropping one or several enhancement layers from the payload data does not change the value of the checksum. Only one checksum is transmitted, e.g., in the payload or in the header of the lower-layer protocol. The transmitter modifies the encoded bit stream in such a manner that the entity in the network deploying the scalable payload and removing layers from the packet does not need to recalculate the checksum placed in the payload or packet header, even when the payload size is changed.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: October 29, 2013
    Assignee: Nokia Corporation
    Inventors: Pasi Ojala, Ari Lakaniemi
  • Patent number: 8559576
    Abstract: Embodiments of a synchronization circuit are described. This synchronization circuit includes multiple selectively coupled synchronization stages which are configurable to synchronize data and control signals between a first time domain and a second time domain, where the synchronization can be performed based on asynchronous or synchronous events associated with either the first time domain or the second time domain. Additionally, the synchronization circuit includes control logic, coupled to the synchronization stages, which is configured to adapt a number of synchronization stages used to synchronize the data and the control signals based on an estimate of a probability of metastability persisting to an output of the synchronization circuit during the synchronization.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: October 15, 2013
    Assignee: Oracle America, Inc.
    Inventors: Tarik Ono, Mark R. Greenstreet
  • Patent number: 8553723
    Abstract: According to a first aspect, the invention proposes a method for processing a transport stream (TS) received as an input transport stream in a processing device (SDR), the transport stream comprising a plurality of elementary streams (ES), each elementary stream (ES) being a set of transport stream packets having the same Packet IDentifier (PID), at least one of these elementary streams being time-sliced so as to be sent in bursts, timing information indicating within a burst the time to the beginning of the next burst, characterized in that it comprises the steps of: applying a filtering operation to the input transport stream so as to filter out from the input transport stream part or all of one or more time-sliced elementary streams; modifying the bursts scheduling of the input transport stream so as to generate a DVB-H compliant output transport stream from the filtered input transport stream.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: October 8, 2013
    Assignee: UDCAST
    Inventors: Antoine Clerget, Patrick Cipiere
  • Patent number: 8553730
    Abstract: A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: October 8, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Timothy M. Schmidl, Anuj Batra, Srinath Hosur
  • Patent number: 8553619
    Abstract: Time synchronization between a control center and transmitters in a single frequency network is provided by generating and receiving a first reference time signal with a high time and frequency accuracy in a short and long time horizon and a second reference time signal supplied to the control center with a low time and frequency accuracy in the short time horizon and a high time and frequency accuracy in the long time horizon. A transport data stream is generated and supplied to the transmitters with a time-variable data rate through the control center corresponding to a frequency of the second reference time signal. Time displacement of the transport data stream received from the control center is performed by a respective transmitter until the data packets of the transport data stream each containing a transmission time are transmitted at a correct transmission time.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: October 8, 2013
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Norman Herzog, Guenther Zurek-Terhardt
  • Patent number: 8555373
    Abstract: A high-speed security device for network connected industrial controls provides hybrid processing in tandem hardware and software security components. The software security component establishes state-less data identifying each packet that requires high-speed processing and loads a data table in the hardware component. The hardware component may then allow packets matching data of the data table to bypass the software component while passing other non-matching packets to the software component for more sophisticated state analysis.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: October 8, 2013
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Brian A. Batke, Sivaram Balasubramanian
  • Publication number: 20130250976
    Abstract: The invention relates to a method or an arrangement for the clock synchronization of a plurality of distributed modules of an information or communication system, said modules being coupled via a packet-switched network. At least two of said modules are controlled by a local clock generator of the modules using an adjustable frequency, and a clock signal is transmitted via the network in the form of clock signal packets in a synchronous minter with respect to the local clock of the modules.
    Type: Application
    Filed: January 28, 2011
    Publication date: September 26, 2013
    Inventor: Thomas Lindner
  • Patent number: 8542654
    Abstract: A base station transmits control message(s) to a wireless device configuring secondary cell(s). Each of the secondary cells is assigned to a cell group in a plurality of cell groups comprising a primary cell group and at least one secondary cell group. The control message(s) comprise dedicated parameters. If dedicated parameters comprise a cell group index for the secondary cell, the wireless device assigns the secondary cell to one of the at least one secondary cell group identified by the cell group index. Otherwise, the wireless device assigns the secondary cell to the primary cell group.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: September 24, 2013
    Assignee: Ofinno Technologies, LLC
    Inventor: Esmael Hejazi Dinan
  • Patent number: 8543151
    Abstract: The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes generating a first sequence and a second sequence for identifying cell groups; generating a first scrambling sequence and a second scrambling sequence that are one-to-two mapped to the sequence number of the primary synchronization signal; scrambling the first sequence with the first scrambling sequence and scrambling the second sequence with the second scrambling sequence; and generating a secondary synchronization signal including the scrambled first sequence and second sequence and mapping the secondary synchronization signal to a frequency domain.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: September 24, 2013
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Institute
    Inventors: Il Gyu Kim, Young Jo Ko, Hyeong Geun Park, Kap Seok Chang, Hyo Seok Yi, Young-Hoon Kim, Seung Chan Bang, Kyoung Joon Lee
  • Patent number: 8537951
    Abstract: A network entity and computer program for detecting occurrence of transmission resynchronizations in a network carrying packets subject to variable delays, and adaptively varying the play out time of data packets. The method may include that the packets are received at a network entity and forwarded by delaying them by a jitter protection time, and determining for a predetermined time period a set of arrival time jitter values. A peak to peak value may be determined indicating the largest difference among the values included in the determined set of arrival time jitter values and detecting an out of range condition. The peak to peak value may be compared with the jitter protection time when the out of range condition is detected and detecting that a resynchronization occurred on the basis of the comparing.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: September 17, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Arto Mahkonen
  • 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: 8520789
    Abstract: The present invention relates to the communication field and discloses a method and an apparatus for implementing pulse synchronization, so that the control on a single-chip multi-channel device can be simplified. A method for implementing pulse synchronization includes: when a cycle count value corresponding to a reference symbol port of the multiple ports reaches a length of a predetermined pulse cycle, obtaining, by a microprocessor, cycle count values corresponding to the multiple ports; obtaining lengths of temporary synchronization cycles of the multiple ports according to the length of the predetermined pulse cycle and the cycle count values corresponding to the multiple ports; and sending the lengths of the temporary synchronization cycles to logic circuits corresponding to the multiple ports. Embodiments of the present invention are mainly applied in communication systems to output pulse symbols synchronously.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: August 27, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yang Li, Matthew Leung, Tin Yau Fung
  • Patent number: 8520706
    Abstract: In current transmitting methods, an instantaneous interruption of a transmission data may occur at the time of switching a system. A sending method of the present invention is a sending method for transmitting a data string signal to a primary system and a backup system in which: a first periodic signal which becomes a reference signal and a second periodic signal with a longer cycle period than the first periodic signal are generated; a data string signal is synchronized with the first periodic signal; and the data string signal synchronized with the first periodic signal is multiplexed by a cycle period synchronized with the second periodic signal to transmit it to the primary system and the backup system.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: August 27, 2013
    Assignee: NEC Corporation
    Inventor: Shinji Tanimoto
  • 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
  • Publication number: 20130216218
    Abstract: Embodiments of the present disclosure relate to a method and a device for compensating for a time path. In the embodiments of the present disclosure, on the basis of not changing implemented 1588 synchronization architecture, a compensation unit is added on a service board unit, the compensation unit calculates a compensation time value for asymmetrical reception and transmission of fiber links and transfers the compensation time value into the service board unit, and the service board unit implements automatic compensation according to a port status. The method and the device for compensating for a time path according to the embodiments of the present disclosure may implement automatic compensation for receiving and sending fiber links without manually testing the asymmetry of links node by node, so that the embodiments of the present disclosure can be widely applied in time synchronization networks.
    Type: Application
    Filed: March 19, 2013
    Publication date: August 22, 2013
    Applicant: Huawei Technologies Co., Ltd.
    Inventor: Huawei Technologies Co., Ltd.
  • Patent number: 8514834
    Abstract: A method and apparatus for allocating resources using a directional beam in a wireless communication network is provided. A coordinator device calculates the number of flows able to be concurrently transmitted with each flow that is generated between the nodes and a transmission time of the each flow, and groups together the flows based on the calculation result. In addition, the coordinator device allocates resources to the respective nodes such that the nodes which generate the flows belonging to the same group can transmit the flows concurrently. Thus, the amount of the overall concurrent transmission can be maximized.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: August 20, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yong-Sun Kim, Woo-Yong Lee
  • Patent number: 8514983
    Abstract: A signal selection apparatus for selecting a target signal from a plurality of input signals is provided. The input signals correspond to different time indexes. The signal selection apparatus comprises a weight calculation unit for generating a corresponding weight respectively for each of the input signals, a processing unit for processing the input signals respectively to generate a plurality of processed signals according to the weights, and a selection unit for selecting a signal with a larger energy from the processed signals as the target signal, wherein the weights are used for adjusting an individual energy of the input signals such that the time index of the target signal is earlier within the input signals.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: August 20, 2013
    Assignee: MStar Semiconductor, Inc.
    Inventors: Chung-Hsiung Lee, Yu Hsien Ku
  • 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: 8514985
    Abstract: Apparatus for locating a specific point in a received signal of cyclical nature, the apparatus comprising correlating means (16) for correlating the received signal with a code that is potentially present in the received signal, processing means (20,22,18) for multiplying the correlation result with a time-offset, complex-conjugated version of itself and filtering means (24,26,28) for low pass filtering the multiplication result to produce a signal suited to analysis for determination of said point and estimation of the frequency error.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: August 20, 2013
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Candido Levita
  • Patent number: 8514755
    Abstract: A transmitting and receiving system is provided. The transmitting of receiving system includes a transmitting apparatus to transmit data and a receiving apparatus to receive the data by means of radio communication. The transmitting apparatus includes: data transmission means for transmitting the data; state information reception means for receiving state information indicative of states of the radio communication from the receiving apparatus; and control means for controlling transmission using the data transmission means.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: August 20, 2013
    Assignee: Sony Corporation
    Inventor: Masato Kawada
  • Patent number: 8494010
    Abstract: The change of the transfer mode is notified using a predetermined bit in a header of a packet. Accordingly, the transfer mode can be dynamically switched from a DDR to a SDR, in which power consumption is low, without complicating the configuration. When the transfer mode is the SDR, further power saving is realized by changing the slew rate or stopping some circuits.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: July 23, 2013
    Assignee: Fujitsu Limited
    Inventor: Kenji Suzuki
  • Patent number: 8494009
    Abstract: A network component comprising at least one processor configured to promote transmission of a frame from a first node to a second node, the frame comprising a first clock synchronization data, and a first frame count, wherein the first clock synchronization data and the first frame count are used to synchronize a first clock in the first node and a second clock in the second node. Also disclosed is a method comprising processing a frame comprising an Ethernet control symbol that delineates the beginning of the frame, a first clock synchronization data, a first frame count, and a second clock synchronization data. Included is an Ethernet node comprising at least one processor configured to synchronize a clock using a clock synchronization data comprising a first timestamp, a first frame count, a second timestamp, and a second frame count.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: July 23, 2013
    Assignee: Futurewei Technologies, Inc.
    Inventor: Serge Francois Fourcand
  • Patent number: 8488503
    Abstract: A magnetic field communication method is provided for managing node with low power consumption which enhances performance and efficiency of a magnetic field area network in the low frequency region. The magnetic field communication method for managing node with low power consumption of the present invention is accomplished in a low-frequency wireless network that is comprised of a MFAN-C and at least one MFAN-N wherein a physical layer is comprised of a preamble, a header, and a payload, and the preamble is comprised of a wake-up sequence and a synchronization sequence. The wake-up sequence is only added to the preamble of the frame that is transmitted from the MFAN-C when the MFAN-N is being activated from the hibernation mode. The wake-up sequence is modulated using ASK modulation, and the synchronization sequence is modulated using BPSK modulation.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: July 16, 2013
    Assignee: Korea Electronics Technology Institute
    Inventors: Yun-Jae Won, Seung-Ok Lim, Sun-Hee Kim, Kyu-Sung Hwang
  • Patent number: 8488732
    Abstract: A communication receiver and a receiving method are disclosed. An analog front-end device samples a receiving signal and generates a sampled signal. A signal detector detects presence of the receiving signal according to the sampled signal. A symbol timing recovery (STR) unit determines an optimal symbol sampling point according to a zero-crossing point of the sampled signal when the receiving signal is present, and then generates a recovered symbol based on an optimally chosen sampled value according to the optimal symbol sampling point.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: July 16, 2013
    Assignee: Himax Media Solutions, Inc.
    Inventors: Cheng-Hsi Hung, Shiang-Lun Kao
  • Patent number: 8489748
    Abstract: A system for providing various overlay information one UPnP AV media renderers. According to the present invention, indications of messages and/or other information received by a UPnP mobile telephone or other UPnP control point can be directly transmitted to a renderer and exhibited in different manners. The present invention also permits the UPnP control point to transmit an event subscription to the renderer for subsequent use. The renderer permits accept or reject the receipt of various information at the particular time.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: July 16, 2013
    Assignee: Core Wireless Licensing S.A.R.L.
    Inventors: Kari Kaarela, Elina Kaarela, Kirmo Koistinen, Timo Tervo
  • Patent number: 8488634
    Abstract: A method and system for a method of transmitting data within a signal frame. The method comprises inserting a first synchronization preamble into a first location within the signal frame and inserting a second synchronization preamble into a second location within the signal frame, wherein the first synchronization preamble conveys information indicative of the second location. The method further comprises issuing the signal frame towards a receiving device in a wireless communication environment.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: July 16, 2013
    Assignee: Apple Inc.
    Inventors: Robert Novak, Mo-Han Fong
  • Patent number: 8483205
    Abstract: The present invention discloses a synchronization method of common control messages among network elements. The method includes that the central network element instructs the distributed network elements to synchronously update the common control messages of the respective specific cells of the distributed network elements. By using the present invention, the synchronous update and synchronous transmission of the common control messages among the cells of different network elements can be realized.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: July 9, 2013
    Assignee: ZTE Corporation
    Inventors: Jianxun Ai, Cuifeng Yao
  • Patent number: 8483732
    Abstract: Methods and devices are provided for disambiguating the timing of uplink transmissions. In one embodiment, the method may involve receiving from a wireless network a global time value having a wraparound time longer than that of a system frame number for the network, the global time value being based at least in part on an overhead message conveying at least one parameter of a first radio access technology (RAT) different from a second RAT used by the network. The method may involve determining a current global time based on the received global time value, and sending an uplink message that includes the current global time as a global timestamp.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: July 9, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Nathan Edward Tenny, Parag Arun Agashe, Kirk Allan Burroughs, Stephen William Edge
  • 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: 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: 8472374
    Abstract: A user equipment is operated in a mobile communications system, wherein a network part of the mobile communications system is capable of operating in a synchronized mode or in an asynchronous mode. Operation includes recording timing information about a periodically occurring signal received from a neighboring cell. The recorded timing information is used in a blind detection process that ascertains whether the network part of the mobile communications system is operating in the synchronized mode or in the asynchronous mode by detecting at least whether the periodically occurring signal received from the neighboring cell occurred within a predetermined window of time of a corresponding periodically occurring signal received from a serving cell. The detected operating mode of the network part of the mobile communications system is used for controlling subsequent operation of the user equipment.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: June 25, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Robert Baldemair, Muhammad Ali Kazmi, Bengt Lindoff
  • 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: 8467418
    Abstract: A method, system and master service interface transfer differential timing over a packet network. The transmitting service interface receives a service clock and is coupled to a receiving service interface through a network backplane. A primary reference clock is provided to time the network backplane. The primary reference clock and the service clock are used to synthesize a copy of the service clock connected to the transmitting service interface. A first control word containing an error differential between the service clock and the synthesized copy of the service clock is generated and transmitted through the network backplane via a packet. The first control word, together with the primary reference clock, is used to recreate the service clock for timing the receiving service interface.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: June 18, 2013
    Assignee: Rockstar Consortium US LP
    Inventors: James Aweya, Michel Ouellette, Delfin Y. Montuno
  • Patent number: 8462762
    Abstract: A radio communication system including a coordinator unit and at least one communications terminal configured for the radio communication system in which access to the radio resource is performed in accordance with time-division multiplexing, where the radio resource is divided into determinate time frames, the coordinator unit assigns to the at least one communications terminal, at least one useful data transmission time slot whose temporal position is determined in sequential time frames with respect to the beginning of the particular time frame, and the individual time frames are structured such that they contain a synchronization time slot, at least one useful data transmission time slot of equal length and one additional dynamic time slot.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: June 11, 2013
    Assignee: Siemens Aktiengessellschaft
    Inventors: Ulrich Sinn, Christoph Weiler
  • Patent number: 8462765
    Abstract: Certain embodiments provide methods and apparatus for adjusting timing in an SDMA system. One method for adjusting the timing of packet transmissions in a wireless communications system, that may be performed by an access point, includes receiving ranging signals from a plurality of wireless network nodes, determining timing adjustment information for adjusting starting timing of packet transmissions from the wireless network nodes based on the ranging signals, and communicating the timing adjustment information to the wireless network nodes.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: June 11, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Santosh P. Abraham, Sameer Vermani, Hemanth Sampath
  • Patent number: 8457104
    Abstract: A method for synchronizing the direct mode TDMA transmission of a set of radios by following a selected radio as the leader includes: receiving, by a radio, a communication from an other radio; identifying, by the radio, a leader according to a leadership election rule using the received communication from the other radio and a current leader information; setting, by the radio, the identified leader as its leader; and synchronizing, by the radio, a time slot boundary with a time slot boundary defined by the leader.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: June 4, 2013
    Assignee: Motorola Solutions, Inc.
    Inventors: Dipendra M. Chowdhary, David G. Wiatrowski
  • Patent number: 8451867
    Abstract: Embodiments of the present invention set forth a method and system for reducing uncertainty in receive and transmit timestamps created by an NTP server. The uncertainty in the receive timestamps is removed by recording the time-of-arrival in the hardware clock of the NTP server before the incoming packets may be delayed by traversing the various layers of software in a timestamping system. The uncertainty in the transmit timestamps is removed by giving the outgoing packets a timestamp in the future using an estimate of the transmission latency calculated by the latency estimator filter. Subsequently, the actual time-of-departure is used to re-calculate and update the estimate of the transmission latency. In this fashion, superior control of the timestamping function may be implemented in existing NTP servers in a manner that retains interworking compatibility with the current NTP standards.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: May 28, 2013
    Assignee: Symmetricom, Inc.
    Inventor: Gregory Louis Dowd
  • Patent number: 8451709
    Abstract: The invention provides precise estimation of a channel response and correct demodulation of an information signal even in the circumstance of being likely suffering interference. The invention includes an error correcting code unit 1, an S/P converting unit 2, a mapping unit 3, an IDFT (Inverse Discrete Fourier Transform) unit (IFFT: Inverse Fast Fourier Transform can be used) 4, a P/S converting unit 5, a GI (Guard Interval) inserting unit 6, preamble (A, B0, B1) storage selecting units 11-a and 11-b, switch units 12-a and 12-b, D/A converting units 13-a and 13-b, radio units 14-a and 14-b and antenna units 15-a and 15-b.
    Type: Grant
    Filed: January 16, 2006
    Date of Patent: May 28, 2013
    Assignees: Sharp Kabushiki Kaisha, Osaka University, National Institute of Information and Communications Technology
    Inventors: Yasuhiro Hamaguchi, Shimpei To, Hideo Nanba, Seiichi Sampei, Hiroshi Harada, Masafumi Moriyama
  • Patent number: 8451869
    Abstract: A network device includes a substitutor and a transmitter. The substitutor receives input columns of concurrently received input symbols. Each of the input columns includes one input symbol from each of a plurality of parallel input lanes. The substitutor generates output columns corresponding to the input columns, wherein each of the output columns includes one output symbol for each of a plurality of parallel output lanes. The substitutor replaces the output symbols of a selected column of the output columns with alignment symbols. The selected column is immediately followed by a second column, and the second column is immediately followed by a third column. The substitutor replaces the output symbols of the second column with disposable symbols, and replaces the output symbols of the third column with boundary symbols. The transmitter drives data onto a communications medium in response to the output symbols generated by the substitutor module.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: May 28, 2013
    Assignee: Marvell International Ltd.
    Inventor: William Lo
  • Patent number: RE44284
    Abstract: A cell search system for a mobile station in a time division duplex system includes: a primary synchronization code search module for searching primary synchronization codes and comparing frame values of the primary synchronization codes to determine a position of the maximum value; a correlation module for estimating a phase value and acquiring a first correlation value; a secondary synchronization code search module for generating determinative variables and storing them based on the position of the maximum value; a comparison and decision module for detecting a maximum value of the determinative variables, comparing it with the values stored in the secondary synchronization code search module to count matching values, and comparing the count value with a system value to decide whether slot synchronization and group acquisition is successful; and a base station determination module for determining a second correlation value between midamble codes and the received signals, and selecting a maximum value of it
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: June 11, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yu-Ro Lee, Dong-Seung Kwon