Synchronization Information Is Distributed Over Multiple Frames Patents (Class 370/510)
  • Patent number: 7764713
    Abstract: Synchronization of related packet data network streams is provided. Synchronization is achieved by inserting synchronization packets into data streams that are to be aligned with one another after transmission of those data streams across a network. More particularly, corresponding synchronization packets are inserted into the corresponding data streams at the same time, to serve as markers for performing synchronization of the data at the receiving end. The corresponding data streams may comprise an audio data stream and a corresponding video data stream.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: July 27, 2010
    Assignee: Avaya Inc.
    Inventors: Cherian Abraham, Timothy Connal Delaney, Nevill Inglis, Karen Phelan, Luke Anthony Tucker
  • Patent number: 7760793
    Abstract: A communications network and method thereof include a base station controller configured to provide a repetition period of a primary synchronization channel to be equal to a predetermined integer value times a scrambling code length of the scrambling code of a common pilot channel. A user equipment in the network is configured to search for a known sequence comprising the primary synchronization channel to select a cell and a corresponding sub-frame/symbol timing from the selected cell.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: July 20, 2010
    Inventors: Ülo Parts, Anders Østergaard Nielsen, Kaj Jansen
  • Patent number: 7756166
    Abstract: In a transmission system with a transmitter coupled to a receiver a main signal encoded according to a coding property is transmitted together with an auxiliary signal (AUX). In order to transmit the auxiliary signal without needing additional space in the transmission frame, the auxiliary signal is transmitted by changing the coding property according to a predetermined sequence. This is done by means of the sequencer. In the receiver, the decoding of the predetermined sequence is performed by a decoder.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: July 13, 2010
    Assignees: Koninslijke Philips Electronics, N.V., Sharp Corporation
    Inventors: Constant P. M. J. Baggen, Arie G. C. Koppelaar, Ewa B. Heckstra
  • Patent number: 7724779
    Abstract: This invention provides a transmission system and control method capable of reliably transmitting real-time data. A switching device and router each serving as an intermediate device mediate an iso-data packet sent from each iso-data server to a predetermined terminal at a timing designated by an iso-packet from the iso-server. If a plurality of iso-data packets conflict in the transmission path, the switching device and router collectively continuously output the plurality of iso-data packets.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: May 25, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiko Morimura, Kenichi Morikawa, Jun Kawashima
  • Patent number: 7724781
    Abstract: A receive virtual concatenation processor (processor) is adapted to receive time-slot interleaved data carried over SONET/SDH frames. The processor first generates per time-slot data and subsequently generates per channel data. The processor supports virtual concatenation, contiguous concatenation as well as mixed concatenation in which some channels are contiguously concatenated and others are virtually concatenated. The processor supports virtual concatenation at both STS-1 and STS-3c granularities and with arbitrary differential delay among constituent time-slots. The processor supports contiguous concatenation with any multiple of STS-3c granularity. The processor is highly scalable to support multiple channels and different frame sizes such as STS-12, STS-48, STS-192, etc.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: May 25, 2010
    Assignee: PMC-Sierra, Inc.
    Inventors: Zhao Wu, Heng Liao
  • Patent number: 7721001
    Abstract: Systems and methods are disclosed for time synchronization of operations in a control system. Synchronization networks and devices are provided for transferring synchronization information between controllers in a distributed or localized control system, which is employed in order to allow operation of such controllers to be synchronized with respect to time. Also disclosed are synchronization protocols and hardware apparatus employed in synchronizing control operations in a control system.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: May 18, 2010
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Mark Flood, Anthony Cachat, Mark Ruetty, Steven Zuponcic
  • Patent number: 7715559
    Abstract: An apparatus (213) and corresponding methods (FIG. 7) to facilitate maintaining crypto synchronization while processing communication signals in a communication unit includes a vocoder (215) configured to convert input audio band signals to vocoder output frames; a crypto processor (217) configured to encrypt the vocoder output frames to provide encrypted output frames; and a synchronizer (219) configured to substitute in a predetermined manner synchronization information corresponding to an encryption state of the crypto processor for a portion of the encrypted data in a portion of the encrypted output frames to provide resultant output synchronization frames suitable for synchronizing a decryption process at a target communication unit.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: May 11, 2010
    Assignee: Motorola, Inc.
    Inventors: Bradley J. Rainbolt, Marc A. Boillot
  • Patent number: 7701979
    Abstract: Disclosed is a Residential Ethernet node apparatus for maintaining a starting point of a superframe, the Residential Ethernet node apparatus comprising a synchronous queue for receiving and temporarily storing synchronous data, in order to transmit the synchronous data by inserting the synchronous data into a transmission cycle, a parser for receiving asynchronous frames from at least one exterior source, parsing the asynchronous frames according to characteristics of the asynchronous frames, a plurality of the asynchronous queues for separately storing the asynchronous frames received from the parser according to the characteristics of the asynchronous frames, a scheduler for receiving the asynchronous frames from the asynchronous queues, and transmitting the received asynchronous frame when it is possible to transmit the received asynchronous frame, and a multiplexer, which receives a synchronous frame from the synchronous queue and an asynchronous frame from the scheduler so as to transmit the synchronous
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: April 20, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-Hun Cho, Sang-Ho Kim, Yun-Je Oh, Jong-Ho Yoon, Han-Kyun Jung
  • Patent number: 7630408
    Abstract: A method of processing data comprises the receiving a frame of data having a predetermined number of time slots (502,504,506). Each time slot comprises a respective plurality of data symbols (520). The method further comprises a primary (508), a secondary (510) and a tertiary (512) synchronization code in each said predetermined number of time slots.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: December 8, 2009
    Assignee: Texas Instruments Incorporated
    Inventor: Sundararajan Sriram
  • Patent number: 7630406
    Abstract: Embodiments of methods and apparatus for providing a delayed attack protection system for network traffic are generally described herein. Other embodiments may be described and claimed.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: December 8, 2009
    Assignee: Intel Corporation
    Inventors: Kapil Sood, Jesse Walker, Emily H. Oi
  • Patent number: 7626975
    Abstract: Transmission of broadcast streams in multiple sectors is synchronized based on time stamps or sequence numbers in data packets received at the base station. The base stations use the time stamps to calculate a frame transmission start time and start position for the data packets. The base station monitors the packet latency of data within its buffer based on the time stamp in the data packets and initiates a resynchronization procedure if the packet latency exceeds predetermined bounds.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: December 1, 2009
    Assignee: Telefonaktiebolaget LM Ercisson (publ)
    Inventors: Erik Colban, Srinivasan Balasubramanian, Irfan Khan
  • Patent number: 7620135
    Abstract: A data processing apparatus receives a message containing a sync break interval with a unique bit pattern and a sync field interval identified by the sync break interval. A timing property of the sync field interval specifies the length of bit periods of the message. A clock source circuit supplies a sampling clock signal to define time points for sampling bits from the message. The clock source circuit adapts a frequency of the sampling clock signal to the timing property of the sync field interval.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: November 17, 2009
    Assignee: NXP B.V.
    Inventors: Franciscus Johannes Klosters, Patrick Willem Hubert Heuts, Joris Rudolf Beverloo, Hendrik Bernard Heule
  • Patent number: 7613212
    Abstract: A centralized clock distribution mechanism for synchronous TDM communications traffic transported over asynchronous networks such as Ethernet networks. The centralized clocking mechanism of the present invention distributes a high accuracy central clock source to a plurality of CES modules over an Ethernet network. Clock synchronization information based on a high quality clock reference source is distributed to circuit emulation service (CES) modules in the network. CES modules receive the clock synchronization information and use it to reconstruct a local clock. A plurality of clock distributors provide clock redundancy whereby each CES module selects the best clock source to use in reconstructing the local clock.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: November 3, 2009
    Assignee: Atrica Israel Ltd.
    Inventors: Yaron Raz, Pavel Hardak, Amir Lahat, Alex Arnon, Gila Klein
  • Patent number: 7593738
    Abstract: A method and system are specified to determine, provide, and exploit the precise time base relations between the distinct signal timings of the Global Positioning System (GPS) and a wireless communications system (WCS) for which the internal WCS downlink time base standards are not inherently synchronized to GPS timing. These downlink signal synchronization facilities are particularly beneficial for a wireless location system (WLS) and related methods and subsystems that provide mobile-station location determination through the exploitation of the time base synchronization information, e.g., to assist a GPS-equipped mobile station in determining its GPS-derived measurements with enhanced efficiency and accuracy.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: September 22, 2009
    Assignee: TruePosition, Inc.
    Inventor: Robert J. Anderson
  • Patent number: 7574224
    Abstract: A wireless terminal using OFDM signaling supporting both terrestrial and satellite base station connectivity operates using conventional access probe signaling in a first mode of operation to establish a timing synchronized wireless link with a terrestrial base station. In a second mode of operation, used to establish a timing synchronized wireless link with a satellite base station, a slightly modified access protocol is employed. The round trip signaling time and timing ambiguity between a wireless terminal and a satellite base station is substantially greater than with a terrestrial base station. The modified access protocol uses coding of access probe signals to uniquely identify a superslot index within a beaconslot. The modified protocol uses multiple access probes with different timing offsets to further resolve timing ambiguity and allows the satellite base station access monitoring interval to remain small in duration.
    Type: Grant
    Filed: July 18, 2005
    Date of Patent: August 11, 2009
    Assignee: QUALCOMM Incorporated
    Inventors: Frank A. Lane, Rajiv Larola, Junyi Li
  • Patent number: 7561599
    Abstract: A method for providing reliable multicasting is described. A transmitted multicast packet is received at second devices, each of which in response transmits a first acknowledgement. If a second acknowledgement, which acknowledges the first acknowledgement, is not received within a predetermined time period, the first acknowledgement is retransmitted. If all first acknowledgements are not received within a preset time period, the multicast packet is retransmitted. If the retransmitted multicast packet has been received, at each of the second devices, if the second acknowledgement has not been received the first acknowledgement is retransmitted, while if the second acknowledgement has been received, the retransmitted multicast packet is ignored and no additional first acknowledgement is transmitted.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: July 14, 2009
    Assignee: Motorola, Inc.
    Inventors: Randy L. Ekl, Anthony R. Metke
  • Patent number: 7555196
    Abstract: Methods and systems for indexing programs are described. In accordance with one embodiment, program data associated with a program recorded on a first entertainment system is processed sufficient to create one or more signatures. The signatures define points of reference that can be utilized to synchronize timecodes associated with other recorded versions of the program from which the signatures were created. One or more indices are created and associated with the program from which the signatures were created. An index file can be created and can contain the created indices as well as the created signatures. A client system that receives the index file can use the signatures to synchronize the timecode on its recorded version of the program with a timecode of the program from which the signatures were created. Once the timecodes are synchronized, the client system can locate the same indices on its recorded version of the program.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: June 30, 2009
    Assignee: Microsoft Corporation
    Inventors: Jeffrey D. Crawford, Thomas H. Taylor, Peter J. Potrebic
  • Patent number: 7555017
    Abstract: Method and Apparatus for delivering audio signals from a source node to a destination node on a network. The apparatus uses a number of switches that transmit prioritized data on a packet network. The switches are coupled to a number of send/receive nodes for sending and receiving digital audio signals on the data network. The audio packet size and the receive buffers are sized to store a minimum possible number of audio samples to minimize latency in processing audio signals arriving at said receive node, but still ensure audio delivery without interruption due to packet data network delay. An additional feature of the invention is recovery of clock synchronization over the same data network by novel arrangement of transmission of timing packets on the network.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: June 30, 2009
    Assignee: TLS Corporation
    Inventors: Gregory F. Shay, Steven Gray Church
  • Patent number: 7551611
    Abstract: A control unit produces a packet signal composed of a plurality of streams, based on a plurality of inputted data signals. For each of a plurality of data signals, a baseband processing unit multiplies the produced packet signal by a weight vector. The control unit appends a common known signal to a header portion of a plurality of data signals, and appends a dedicated known signal to a front part preceding a data signal by which a dedicated weight vector is to be multiplied, in the plurality of data signals. Of the produced packet signal, the baseband processing unit multiplies the dedicated known signal and a data signal assigned posterior to this dedicated known signal by the dedicated weight vector, and of the produced packet signal it multiplies a part by which no dedicated weight vector is to be multiplied, by a common weight vector.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: June 23, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Seigo Nakao
  • Patent number: 7542479
    Abstract: The present invention discloses a device and method for implementing multi-port service convergence. The device at least comprises a clock & data recovery module, a encapsulating module, a mapping module, a de-mapping module and a decapsulating module, and further comprises at least one branch clock generating and adjusting module for determining transmitting clock frequency information of decapsulated service data and adjusting local branch clock frequency based on the transmitting clock frequency.
    Type: Grant
    Filed: August 16, 2004
    Date of Patent: June 2, 2009
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Li Zeng, Jingling Liao, Xiaohong Wei
  • Patent number: 7542486
    Abstract: A method for processing an incident pulsed signal of an ultra wide band type received over a channel by a data device operating in a wireless data communications system is provided. The incident pulsed signal carries information within a super-frame structure. Upon reception of each super-frame structure by a data device, coarse synchronization is performed with another data device acting as a coordinator device for the wireless data communications system. The coarse synchronization uses a first training sequence. Upon reception of each frame allocated to the data device operating within the super-frame structure, channel estimation is performed using a second training sequence. The channel estimation also performs a frame synchronization.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: June 2, 2009
    Assignee: STMicroelectronics N.V.
    Inventor: Chiara Cattaneo
  • Patent number: 7539219
    Abstract: A method and apparatus is provided for synchronizing both the initiation of playback of digital multimedia data in one or more receivers and the rate of playback of the digital multimedia data in the one or more receivers, all receiving the digital multimedia data from a single transmitter, without transmitting clock or timing signals to the receiver(s). An exemplary embodiment is described using the AC powerline as a medium of transmission, although the method and apparatus are adaptable to a variety of communication media.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: May 26, 2009
    Assignee: RadioShack Corporation
    Inventors: Sze Ming Patrick Kwong, Man Lung Alan Lam, Tun Oo Maung
  • Patent number: 7532566
    Abstract: Systems and methods for orthogonal frequency division multiplexing multipoint-to-point communications systems are provided. In one embodiment, a method comprises: establishing communication between a first remote unit of a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; receiving an address code assignment from the host unit, the address code to be used in communicating with the host unit, wherein the address code is unique among the plurality of remote units; and transmitting up to a plurality of tones from the first remote unit, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: May 12, 2009
    Assignee: ADC Telecommunications, Inc.
    Inventors: Michael J. Geile, Michael J. Fort
  • Patent number: 7526302
    Abstract: The invention relates to a method of synchronizing a mobile station with a base station in a wireless communications system, to a mobile station for a wireless communications system, as well as to a wireless communications system of this kind. In order to enable faster ultimate synchronization, it is proposed to compare components of the received data not only with a stored synchronization pattern, but also with a stored identification pattern prior to the adaptation of the timing of the mobile station to received data. Already before the synchronization it can thus be determined with a high degree of probability whether received data originates from a desired base station or not. The necessity of checking the contents of packets which are not associated with a desired base station can thus be avoided.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: April 28, 2009
    Assignee: DSP Group Switzerland AG
    Inventor: Christopher Stobart
  • Patent number: 7505522
    Abstract: A method of shaping an orthogonal frequency division multiplexing (OFDM) signal spectrum is disclosed. The method comprises receiving an input signal that has a frequency spectrum that includes a frequency peak, and limiting the amplitude of the frequency peak to a predetermined clip level. An orthogonal frequency division multiplexing (OFDM) transmitter is disclosed. The OFDM transmitter comprises an input interface configured to receive an input signal that includes a frequency spectrum that includes a frequency peak, and a processor coupled to the input interface, configured to limit the amplitude of the frequency peak to a predetermined clip level.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: March 17, 2009
    Assignee: Staccato Communications, Inc.
    Inventor: Torbjorn A. Larsson
  • Patent number: 7502381
    Abstract: A network terminal of the present invention includes: a synchronization information frame receiving section for receiving a synchronization information frame from a master terminal; a network information managing section for maintaining the network by being synchronized with the synchronization information frame; a synchronization information frame missing detection section for detecting the missing of the synchronization information frame from the master terminal; a priority list storing section for storing a priority list which defines a synchronization information frame transmission start time in such a manner as to differentiate synchronization information frame transmission start times between the network terminals; and a synchronization information frame transmission section for, in a case where the network terminal acts as a new master terminal of the network system, periodically outputting a synchronization information frame, from the synchronization information frame transmission start time in accord
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: March 10, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Mitsuaki Nakamura
  • Patent number: 7483448
    Abstract: A method and system for network terminal clock synchronization includes determining a respective round trip delay time from a master terminal to each slave terminal and offsetting the clock of each slave terminal by an amount proportional to the respective determined round trip delay time such that the master terminal and each of the slave terminals have substantially the same point of reference in time. The method and system further include, in response to a trigger signal, determining a respective offset between the master clock of the master terminal and the clocks of each of the slave terminals and offsetting the clocks of each of the slave terminals by an amount proportional to the determined respective offset to synchronize the clocks of each of the slave terminals to the master clock of the master terminal.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: January 27, 2009
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Rajan Bhandari, Miguel Dajer, Mahendra Tailor
  • Patent number: 7483473
    Abstract: A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or epoch, a portion is dedicated to sending only pilot symbols. Another portion of the frame is reserved for sending mostly data symbols; however, within this second portion of the frame, additional pilot symbols are interleaved among the data symbols. The pilot symbol or preamble portion of the access channel frame allows for efficient acquisition of the access signal at the base station, while providing a timing reference for determining the effects of multipath fading. In particular, a pilot correlation filter provides a phase estimate from the pilot symbols in the preamble portion, which is then used to decode the data symbols in the payload portion. An access acquisition portion of the receiver uses the phase estimates provided by the pilot correlation filter to process the output of a data symbol correlation filter.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: January 27, 2009
    Assignee: IPR Licensing, Inc.
    Inventors: John E. Hoffmann, George Rodney Nelson, Jr., James A. Proctor, Jr., Antoine J. Rouphael
  • Patent number: 7477660
    Abstract: A system and method for frame detection and generation. Each incoming clock-data stream is divided into two independent data streams: a clock path which preserves the timing of the individual clock domains and a data path which multiplexes an arbitrary number of data streams onto a parallel path. A framer array structure implements a context swap and synchronizes the data streams.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: January 13, 2009
    Assignee: Infineon Technologies North America Corp.
    Inventors: Russell D. Homer, Olaf Moeller
  • Patent number: 7463618
    Abstract: A Universal Mobile Telephone System (UMTS) receiver performs slot synchronization using a received primary synchronization channel (PSCH). Subsequent to completion of slot synchronization, the UMTS receiver performs frame synchronization using a received secondary synchronization channel (SSCH) in such a way that the UMTS receiver uses the received primary synchronization channel (PSCH) to detect a change in channel conditions.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: December 9, 2008
    Assignee: Thomson Licensing
    Inventors: Louis Robert Litwin, Wen Gao
  • Patent number: 7457389
    Abstract: Described are a system, method and device to synchronize block data received in a data stream where the data stream is received on set data word increments. A synchronization header in each of a plurality of consecutive data word increments may be detected in a common location of a set portion or window of each consecutive fixed word increment. The data stream may be slipped by a fixed bit quantity in response to detecting an absence of the synchronization header in the common location of the set portion of a received data word increment.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: November 25, 2008
    Assignee: Intel Corporation
    Inventors: Donald W. Alderrou, Diem-Ha N. Tran
  • Patent number: 7428250
    Abstract: A method for receiving data messages in communications systems having redundant network paths. Received data of a peripheral representation or image is routed to a node along at least two different network paths. This makes it possible to store a consistent peripheral representation or image in a memory (12) of a node, if there is a disturbance in the data transmission along one network path.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: September 23, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventors: Johann Arnold, Dieter Brueckner, Franz-Josef Goetz, Dieter Klotz, Juergen Schimmer
  • Patent number: 7426219
    Abstract: The present invention is directed to the reduction of delays introduced in connection with packet data mixing operations. In particular, in accordance with an embodiment of the present invention, communication endpoints providing packet data to a mixer are provided with packetization time adjustment information, in order to synchronize the arrival times of data from different communication endpoints. The packetization time adjustment information may be in the form of an amount of time or number of samples by which the endpoints packetization time should be shifted. The packetization time adjustment information may be provided as additional header information provided as part of a packet containing data transmitted to a communication endpoint from the mixer.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: September 16, 2008
    Assignee: Avaya Inc.
    Inventor: Alexander Martin Scholte
  • Patent number: 7421280
    Abstract: A mobile station capable of determining a SYNC_ID parameter for a base station serving said mobile station comprises: (i) a memory capable of storing prefix information and an associated SYNC_ID parameter; (ii) a transceiver capable of receiving identity information from the base station and transmitting the SYNC_ID parameter to the base station; and (iii) a controller capable of comparing the prefix information with the identity information, and in response to a match between the prefix information and the identity information, retrieving the SYNC_ID parameter associated with the prefix information.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: September 2, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Purva R. Rajkotia
  • Patent number: 7415002
    Abstract: A device that synchronizes circuits over asynchronous links is disclosed. Some embodiments of the invention include a device that comprises a plurality of circuits. One of the plurality of circuits is designated as a “master” circuit. The master circuit is configured to send a first synchronization signal to one or more of the plurality of circuits, and each circuit that receives the first synchronization signal is configured to responsively send a second synchronization signal to one or more of the plurality of circuits.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: August 19, 2008
    Assignee: Brocade Communications, Inc.
    Inventors: Kreg A. Martin, Ronald K. Kreuzenstein, John M. Terry
  • Publication number: 20080187059
    Abstract: A method for shifting the position of a symbol to reduce transmission overhead is described. A frame with a plurality of symbols is provided. A determination is made whether the frame includes an indication of an event. At least one symbol of the plurality of symbols is shifted based on the determination. A counter is set to an initial value. The frame with the at least one shifted symbol is transmitted.
    Type: Application
    Filed: May 24, 2007
    Publication date: August 7, 2008
    Applicant: Sharp Laboratories of America, Inc.
    Inventor: Prem L. Sood
  • Patent number: 7394801
    Abstract: A wireless device generates a peak profile for a primary synchronization channel (PSCH), and has a synchronization stage for performing code group identification and scrambling code identification. A first peak from the peak profile is chosen. The first peak has a first path position. The synchronization stage is handed the first path position to obtain a first code group number and a first code number associated with the first peak. A multi-path search window is then opened in the peak profile around the first path position. A second peak within the multi-path search window is selected, and a verification procedure is performed on this second peak to determine if the second peak has a code number that is identical to the first code number. The first code group number is assigned to the second peak if the code number of the second peak is identical to the first code number.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: July 1, 2008
    Assignee: Qisda Corporation
    Inventor: Che-Li Lin
  • Publication number: 20080151942
    Abstract: A digital broadcasting system and a method of processing data are disclosed. The method of processing data includes grouping a plurality of enhanced data packets, each having information included therein, thereby creating a data group, creating and indicating an identification signal in a predetermined position of at least one enhanced data packet within the data group, the identification signal designating insertion of a field synchronization signal within a data frame, multiplexing the enhanced data packet of the data group and a main data packet, thereby creating a data frame, and inserting a field synchronization signal within the data frame based upon the enhanced data packet having the identification signal indicated therein.
    Type: Application
    Filed: December 11, 2007
    Publication date: June 26, 2008
    Inventors: Hyoung Gon Lee, In Hwan Choi, Kook Yeon Kwak, Jong Moon Kim, Won Gyu Song, Byoung Gill Kim, Jin Woo Kim
  • Patent number: 7386006
    Abstract: In a first step, slot synchronization may be obtained by setting in correlation the received signal with a primary sequence, which represents the primary channel, and storing the received signal. During a second step, the correlator may be re-used for correlating the received signal with a secondary sequence corresponding to the secondary synchronization codes. The correlator may include a first filter and a second filter connected in series, which receive a first secondary sequence and a second secondary sequence, which may include Golay sequences. Architectures of parallel and serial types, as well as architectures designed for reusing further circuit parts are also disclosed. The invention is particularly applicable in mobile communication systems based upon standards such as UMTS, CDMA2000, IS95, and WBCDMA.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: June 10, 2008
    Assignee: STMicroelectronics S.r.l.
    Inventors: Francesco Rimi, Giuseppe Avellone, Francesco Pappalardo, Filippo Speziali, Agostino Galluzzo
  • Patent number: 7386081
    Abstract: A timing control circuit includes a synchronous detecting portion which detects a synchronous pattern data of a received signal which has been demodulated based on a first control signal and generates a detection result, a first counter portion which generates a first signal at each first cycle based on the detection result, a second counter portion which generates a second signal at each second cycle based on the detection result, and a first control portion which generates the first control signal based on the first and second signals.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: June 10, 2008
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Kiyohiko Yamazaki
  • Patent number: 7376120
    Abstract: In the case of radio base stations of different kinds, a synchronization in a radio section cannot be established so that the efficiently effective use of electric waves cannot be retained. According to the invention, therefore, there is provided a TDMA type mobile communication system 100 comprising: a plurality of radio base stations of different system kinds (i.e., a general type radio base station 1, an IP connection type radio base station 10 and a main digital cordless phone 2); mobile phones 5A and 5B wirelessly connected with the plural radio base stations; and a private branch exchange 4 wired with the radio base stations. The radio base station receives, when a synchronized operation mode is decided, a frame signal containing a control CH signal, from a reference radio base station (i.e.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: May 20, 2008
    Assignees: Hitachi Communication Technologies, Ltd., Hitachi Hybrid Network Co., Ltd.
    Inventors: Katsushi Miyawaki, Yuuichi Takahashi
  • Patent number: 7366192
    Abstract: A method of processing a call with reduced call set-up times using one or more telecommunication networks includes providing one or more preferences for a call associated with a first terminal and a second terminal. The one or more preferences are associated with an initial setup of one or more media channels for the call. The method also includes processing the one or more preferences as a preference message, processing the preference message by an FEA procedure to provide an FEA preference message, and transferring a first framing synchronization flag sequence, the FEA preference message, and a second framing synchronization flag sequence from the first terminal to the second terminal. The method further includes receiving one or more acknowledgement preference messages from the second terminal, completing the initial setup of the one or more media channels, and thereafter, exchanging information between the first and second terminals.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: April 29, 2008
    Assignee: Dilithium Networks Pty. Ltd.
    Inventors: Marwan A. Jabri, Robert Jongbloed, Albert Wong
  • Patent number: 7363359
    Abstract: An element management system that can itself be used to perform automatic remote backup of the network elements. A backup procedure is launched on a programmed schedule, to maintain a centrally located copy of the local data stored in the network elements (or their subcomponents). In accordance with a particular embodiment of the present invention, a computer/software system for managing telecommunication network elements includes one or more operator-driven processes which monitor and manage network elements in real time, using at least one telecommunications network control channel. Background processes which remotely back-up information which had been locally stored in ones of said network is automatically initiated.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: April 22, 2008
    Assignee: Fujitsu Limited
    Inventors: Niranjan Tripathy, Gilbert Lévesque, Salim Galou
  • Patent number: 7349400
    Abstract: A transport protocol data flow reconstruction method delays determination that a missing packet is lost for a period of time. For an evaluated TCP packet in a first direction, the method determines if a TCP packet is missing in a second direction, in which case the method stores the evaluated TCP packet in a list and creates an acknowledgement timer indicating a maximum time to wait until treating the missing TCP packet as lost. Expiration of the acknowledgment timer indicates a missing packet in the second direction. The method determines if a TCP packet is missing in the first direction, in which case the method stores the evaluated TCP packet in the list and creates a retransmission timer indicating a maximum time to wait until treating the missing TCP packet as lost. Expiration of the retransmission timer indicates a missing packet in the first direction.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: March 25, 2008
    Assignee: Narus, Inc.
    Inventor: Stanislav Khirman
  • Patent number: 7346107
    Abstract: A VSB communication system or transmitter for processing supplemental data packets with MPEG-II data packets includes a VSB supplemental data processor and a VSB transmission system. The VSB supplemental data processor includes a Reed-Solomon coder for coding the supplemental data to be transmitted, a null sequence inserter for inserting a null sequence to an interleaved supplemental data for generating a predefined sequence, a header inserter for inserting an MPEG header to the supplemental data having the null sequence inserted therein, a multiplexer for multiplexing an MPEG data coded with the supplemental data having the MPEG header added thereto in a preset multiplexing ratio and units. The output of the multiplexer is provided to an 8T-VSB transmission system for modulating a data field from the multiplexer and transmitting the modulated data field to a VSB reception system.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: March 18, 2008
    Assignee: LG Electronics, Inc.
    Inventors: In Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
  • Patent number: 7336637
    Abstract: The CDMA communication device of the present invention includes a spreading unit, radio transmitters, and a control device that includes a setting unit and a determination unit. The spreading unit spreads and multiplexes user data of users. The radio transmitters are provided correspondingly to each of a plurality of frequencies, and modulate with the corresponding frequencies the user data that are supplied from the spreading unit. The determination unit determines the working frequency of users based on the spread factor value of the user data. The setting unit sets the spread factor of the user data in the spreading unit. The setting unit further performs setting of the spreading unit such that user data that have undergone spreading are supplied to the radio transmitter that has been provided correspondingly to the frequency determined by the determination unit.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: February 26, 2008
    Assignees: NEC Corporation, NTT DoCoMo, Inc.
    Inventor: Shintaro Soma
  • Patent number: 7324549
    Abstract: A method and apparatus of transmitting data at a line rate to a bus operating at a bus rate includes transmitting the data in a packet format having a plurality of frames each having a plurality of time slots. Each time slot has successive message groups, and each message group includes a plurality of data messages containing the data and an idle code containing none of the data. A number of idle codes in each frame is selected such that the bus rate matches the line rate. Various communication buses, and methods of synchronizing data are implemented.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: January 29, 2008
    Assignee: Nokia Corporation
    Inventors: Tim Addy, Markku Vainikka, Timo Viero, William Brockington, Markku Vähätaini
  • Patent number: 7302268
    Abstract: A method of a receiver determining the timing of a signal transmitted in a time-slotted manner, the signal comprising a sequence of information which is repeated at a known interval and has at least a known minimum length. The method performs correlation operations between groups of received slots of information, the groups spaced by the known interval. The groups are moved through the received signal, adding and removing slots, to locate a maximum correlation value sum for the group which should correspond to the timing of the slot. The method also can be used to determine a frequency offset at the receiver and/or an initial phase.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: November 27, 2007
    Assignee: Soma Networks Inc.
    Inventors: Shiquan Wu, Rene Lamontagne
  • Patent number: 7274714
    Abstract: The object of the invention is a method for emulating the two-way information flow of a real application in a system, which comprises a first network element (101) and a second network element (102), as well as a packet network (103) between said first network element and said second network element. The method comprises transmitting a set of packets from the first network element (101) through the packet network (103) to the second network element (102). At the second network element, at least part of the transmitted packets are received. In a return transmission, a packet arrived at the second network element is transmitted back to the first network element only after a selected delay from the receiving of the packet at the second network element. The object of the invention is also a system, a network element and a computer program product implementing the method.
    Type: Grant
    Filed: January 15, 2001
    Date of Patent: September 25, 2007
    Assignee: Nokia Corporation
    Inventors: Vilho I. Räisänen, Pekka Pessi
  • Patent number: RE40918
    Abstract: The method has two possible transmission modes: a first mode whereby a first transmitter (1) sends frames including sufficient auxiliary data to enable a first receiver (2) to acquire frame synchronization in a reliable fashion, said auxiliary data including a synchronization pattern, a second mode in which said first transmitter sends frames including insufficient auxiliary data to enable said first receiver to acquire said frame synchronization in a reliable fashion but, by virtue of a knowledge of said frame synchronization acquired previously, in said first mode, enabling loss of frame synchronization to be determined, loss of frame synchronization by said first receiver being signalled to said first transmitter by a second transmitter (15) changing from said second transmission mode to said first transmission mode and by a second receiver (16) detecting said change of transmission mode, and said second transmitter transmitting in said second mode modified frames including no payload data sequence imitati
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: September 15, 2009
    Assignee: Alcatel
    Inventor: Pierre Dupuy