Using Synchronization Information Contained In A Frame Patents (Class 370/509)
  • Patent number: 8964793
    Abstract: A method of configuring downlink timings and transmitting a random access response message is provided for a random access procedure in a Long Term Evolution (LTE) system supporting carrier aggregation. The method for adjusting timing of a terminal in a wireless communication system supporting carrier aggregation of at least one carrier includes transmitting a Random Access Preamble to a base station, and receiving a Random Access Response with a Timing Advance Command (TAC) for commanding uplink timing adjustment from the base station, wherein the Random Access Response comprises information indicating a Timing Advance Group (TAG) to which the TAC is applied.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: February 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jaehyuk Jang, Kyeongin Jeong
  • Patent number: 8964623
    Abstract: The present invention relates to a wireless communication system, and provides a method and an apparatus for transmitting a downlink reference signal in the wireless communication system. The method for enabling a base station to transmit the reference signal to a terminal using layers of 8 or less in accordance with one embodiment of the present invention comprises the steps of: transmitting data for the layers of 8 or less through a data domain of a downlink sub frame; and transmitting a reference signal for the layers of 8 or less on a fixed OFDM symbol of the downlink sub frame, wherein the reference signal is a DRS (Dedicated Reference Signal) which demodulates the data for the layers of 8 or less, and the reference signal for the layers of 8 or less is separated into 1st and 2nd groups, and reference signals of the 1st and 2nd groups can be multiplexed in a CDM (Code Division Multiplexing) method on one resource element, respectively.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: February 24, 2015
    Assignee: LG Electronics Inc.
    Inventors: Hyun Soo Ko, Bin Chul Ihm, Sung Ho Park, Young Seob Lee, Seung Hyun Kang, Ja Ho Koo, Su Nam Kim, Wook Bong Lee, Jin Young Chun
  • Publication number: 20150049248
    Abstract: Methods, systems, and devices are described for media synchronization. Multi-stream media processes may include media streams captured with respect to different clock rates. Multi-processor implementations may involve separate clocks associated with different media streams, such as audio and video, respectively. The separate clocks may tend to drift from one another, becoming further out of sync as time passes. Selecting a reference time of one of the processors to function as a “wall clock,” recording frame capture times with respect to the reference time, accounting for propagation delays, and transmitting frame capture times in terms of the reference time may aid in AV synchronization at a device where audio and video streams are received.
    Type: Application
    Filed: April 28, 2014
    Publication date: February 19, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Min Wang, Tien-Hsin Lee, Shankar Genesh LakshmanaSwamy, Andy Yu, Vikram Singh, Sandeep Padubidri Ramamurthy, Yau Mo Chan, Vasudev Sujir Nayak, Srinivasan Balasubramanian
  • 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: 8953581
    Abstract: A system for synchronizing nodes in a wireless network comprises a first node and a second node. The first node comprising a transmitter, a receiver, and a first time keeper. The second node comprising a transmitter, a receiver, a second time keeper, a timing error measurer for making a timing error measurement between the first time keeper and the second time keeper. The second timekeeper is adjusted to target minimizing the timing error measurement.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: February 10, 2015
    Assignee: Dust Networks, Inc.
    Inventors: Gordon Alexander Charles, Lance Robert Doherty, Thor Nelson Juneau, Mark Alan Lemkin, Jonathan Simon, Zhenqiang Ye
  • Patent number: 8948213
    Abstract: Method, transmitter and computer program product for transmitting data of a real-time communication event from the transmitter to a jitter buffer of a receiver. The method comprises jointly determining (i) at least one processing parameter describing how data is to be processed for transmission from the transmitter to the jitter buffer, and (ii) jitter buffer control information for indicating to the receiver how to control a state of the jitter buffer. The jitter buffer control information is transmitted to the receiver. Data is processed for transmission from the transmitter to the jitter buffer in accordance with the determined at least one processing parameter. The processed data is transmitted from the transmitter to the jitter buffer of the receiver.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: February 3, 2015
    Assignee: Microsoft Corporation
    Inventors: Renat Vafin, Mattias Nilsson, Soren Vang Andersen, Andrei Jefremov
  • Patent number: 8948214
    Abstract: Methods, transmitter, receiver and computer program product for transmitting or receiving data of a real-time communication event, the data being transmitted from the transmitter to a jitter buffer of the receiver. At least one processing parameter describing how data is to be processed for transmission from the transmitter to the jitter buffer in the real-time communication event is determined at the transmitter. Data is processed for transmission from the transmitter to the jitter buffer in accordance with the determined at least one processing parameter. Control information based on the determined at least one processing parameter is transmitted from the transmitter to the receiver, wherein the control information is for use by the receiver to control a state of the jitter buffer. The processed data is transmitted from the transmitter to the jitter buffer of the receiver in the real-time communication event.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: February 3, 2015
    Assignee: Microsoft Corporation
    Inventors: Renat Vafin, Mattias Nilsson, Soren Vang Andersen, Andrei Jefremov
  • Publication number: 20150030038
    Abstract: The present technology relates to a synchronization processing device, a synchronization processing method, and a program, which make it possible to achieve frequency synchronization in a shorter period of time. A jitter amount calculation unit calculates a jitter amount on the basis of a synchronization packet containing time information. A jitter amount accumulation unit calculates a cumulative value of the jitter amount calculated by the jitter amount calculation unit. A comparison unit outputs a frequency error correction value from the calculated cumulative value of the jitter amount. A control voltage generation unit outputs a frequency control voltage based on the frequency error correction value. The present technology can be applied to a receiver device that is time-synchronized with a transmission device, for example.
    Type: Application
    Filed: January 23, 2013
    Publication date: January 29, 2015
    Applicant: SONY CORPORATION
    Inventors: Osamu Matsunaga, Naoki Inomata, Mizuki Kanada
  • Patent number: 8942176
    Abstract: The transmission of a reference signal, such as a CSI-RS, is enabled while maintaining a power saving effect when performing inter-cell cooperative transmission/reception or the like in a plurality of cells. In order to realize inter-cell cooperative transmission/reception, a CSI-RS which is used for estimating the state of a spatial propagation path of a communication line is generated by a CSI-RS generation unit, and the CSI-RS is disposed in a predetermined subframe by a disposition unit and transmitted. At this time, when a frame has ten subframes #0 to 49, the CSI-RS is disposed in the subframes #4 and #9, which are subframes excluding the subframes #0 and #5 incapable of transmitting a CSI-RS and are subframes other than subframes capable of acting as MBSFN subframes when discontinuous communication (Extended Cell DTX) is performed so as to achieve power saving, and transmitted.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: January 27, 2015
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Atsushi Sumasu, Daichi Imamura, Ayako Horiuchi, Yasuaki Yuda
  • Patent number: 8942133
    Abstract: For a peer-to-peer call in an ad hoc wireless network, a wireless device performs discovery of a target wireless device, performs authentication of the target wireless device and generates a session key (e.g., using a pre-shared key or a certificate provisioned on the wireless device), forms an ad hoc wireless network with the target wireless device, and communicates peer-to-peer with the target wireless device via the ad hoc wireless network. The wireless device may perform discovery with a list of identifiers for wireless devices designated to communicate with this wireless device. The wireless device may derive a service set identifier (SSID) used to identify the ad hoc wireless network based on its user-specific identifier (e.g., its phone number) and/or a user-specific identifier for the target wireless device. Other aspects, embodiments, and features are also claimed and described.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: January 27, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ravi Kumar, J. Rodney Walton, Qiang Fu, Subrahmanyam Dravida
  • 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
  • Publication number: 20150010023
    Abstract: Device and methods determine timing parameters and associated timing actions from timing messages in communication packets. The timing messages may be encapsulated with plurality of communication protocols. An example timing message may be an IEEE 1588 timing message encapsulated in an Internet protocol packet encapsulated in an Ethernet protocol packet. The protocols are matched in classifier blocks by comparing portions of the packet to bit values or ranges of values. Operation of other than the first classifier block depends on results of matching in the preceding block by using offset values passed between blocks that indicate starting points for the matching. The final classifier block matches values in timing messages to identify timing parameters and associated timing actions in the message.
    Type: Application
    Filed: September 23, 2014
    Publication date: January 8, 2015
    Inventors: Ron Swartzentruber, Wiliam D. Lopoulos
  • Patent number: 8929400
    Abstract: A physical layer (PL) frame generation method is provided. A PL payload is generated by encoding and modulating source data based on a first modcod of a first set. A synchronization header (a unique word (UW) of a UW set) is appended to the PL payload. The UWs of the set respectively correspond to different modcods of the first set, and the UW corresponds to the first modcod. A PL header is appended to the synchronization header and PL payload to form the PL frame. The PL header comprises a second UW and physical layer signaling (PLS). The PLS comprises encoded data fields reflecting a length of the PL frame, where the data fields are encoded based on a second modcod scheme of a second set. The first modcod set is designed for an SNR operating range relatively lower than the SNR operating range of the second modcod set.
    Type: Grant
    Filed: February 10, 2013
    Date of Patent: January 6, 2015
    Assignee: Hughes Network Systems, LLC
    Inventors: Neal Becker, Lin-Nan Lee
  • Patent number: 8929404
    Abstract: Disclosed herein is a reception apparatus, including: a reception section configured to receive an OFDM (orthogonal frequency division multiplexed) signal obtained by modulating a common packet sequence configured from a packet common to a plurality of streams and a data packet sequence configured from packets individually unique to the plural streams; a buffer configured to accumulate packets of the common packet sequence and the data packet sequence obtained by demodulating the received OFDM signal; a retaining section configured to retain correction information for correcting out-of-synchronism between the common packet sequence and the data packet sequence obtained from particular packets of the common packet sequence and the data packet sequence upon reading out of the packets accumulated in the buffer; and a correction section configured to correct the out-of-synchronism of the packet which suffers from the out-of-synchronism of the packets based on the correction information retained in the retaining s
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: January 6, 2015
    Assignee: Sony Corporation
    Inventors: Takashi Yokokawa, Satoshi Okada
  • Patent number: 8923345
    Abstract: A method for a base station to transmit multimedia broadcast data in a wireless communication system according to the present invention includes receiving Radio Link Control Service Data Units (RLC SDUs), receiving a control message including information on size of RLC SDU to be transmitted in a synchronization period for current transmission, and processing the RLC SDUs using the size information of RLC SDU. The method and apparatus for transmitting multimedia broadcast data of the present invention is capable of transmitting data stably while maintaining integrity of the multimedia broadcast data on radio channels in a wireless communication system.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: December 30, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Seong Hun Kim, Himke Van Der Velde
  • Publication number: 20140376570
    Abstract: Systems and methods for a self-checking pair are provided. In certain embodiments a system on chip in a self-checking pair includes a system architecture; a plurality of communication channels configured for communicating data with an external system; and an integrated system on chip logic configured to collect the data communicated through the plurality of communication channels and transmit the data to a second system on chip and handle received data from the second system on chip, wherein the integrated system on chip logic determines whether the data communicated through the plurality of communication channels matches the received data from the second system on chip.
    Type: Application
    Filed: June 24, 2013
    Publication date: December 25, 2014
    Inventors: Scott Gray, Nicholas Wilt
  • Patent number: 8913705
    Abstract: A mechanism for dynamic skew correction in a multi-lane communication link includes a receiver unit including, for each of the lanes, a first-in first-out (FIFO). The FIFO may store received symbols to locations pointed to by a write pointer and output to downstream logic, symbols stored at locations pointed to by a read pointer. The receiver may also include a symbol drop unit that disables the write pointer in response to receiving a start alignment symbol, and enables the write pointer in response to receiving an end alignment symbol. The receiver also includes an alignment unit that disables the read pointer in response to detecting that the end symbol has been received at least one lane but not all lanes. In addition, the alignment unit may enable the read pointer in response to a determination that the end symbol has been received on all lanes.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: December 16, 2014
    Assignee: Oracle International Corporation
    Inventor: Bruce J. Chang
  • Patent number: 8908672
    Abstract: A method of wireless communication in a dual subscriber identification module (SIM) terminal includes transmitting a first synchronization message from a first module associated with a first SIM. The method also includes receiving a first acknowledgment (ACK) message on a fast physical access channel (FPACH) in response to the first synchronization message. The method further includes sharing timing information included in the first ACK between the first module and a second module.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: December 9, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Tom Chin, Kuo-Chun Lee, Ian J. Fevrier, Peng Li, Danlu Zhang, Guangming Shi
  • Patent number: 8908556
    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: May 13, 2013
    Date of Patent: December 9, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Santosh Paul Abraham, Sameer Vermani, Hemanth Sampath
  • Publication number: 20140355628
    Abstract: The recursive time synchronization protocol method for wireless sensor networks provides a modified and extended RTSP method to make it work with clustered networks. In case of non-clustered or flat network, each node is assumed to be a clusterhead in order to run the RTSP method correctly. The RTSP method involves the election of a reference node, and compensation for offset and drift. Simulation results show that the extended RTSP method further improves the accuracy and energy consumption, i.e., it can provide an average accuracy of 0.23 ?s in a large multi-hop clustered network while using only 1/7th of the energy consumed by FTSP in the long run.
    Type: Application
    Filed: June 3, 2013
    Publication date: December 4, 2014
    Inventors: Muhammad AKHLAQ, Tarek R. SHELTAMI
  • Publication number: 20140355629
    Abstract: There is provided a communication apparatus communicating with a master apparatus generating events at a constant time interval via a network, including: a clocking unit clocking a time; an event generator generating an event based on the clocking unit in accordance with event interval information specifying a time interval for event generation; a storage storing a first timestamp representing a time when the event is generated in the event generator; a receiver receiving, from the master apparatus, a frame containing a second timestamp representing a time of the event generated in the master apparatus; and an event interval corrector correcting the event interval information so as to make a timing of event generation in the event generator closer to a timing of event generation in the master apparatus based on the first timestamp, the second timestamp, and a pre-acquired time difference between the clocking unit and the master apparatus.
    Type: Application
    Filed: June 2, 2014
    Publication date: December 4, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Masashi ITO
  • Patent number: 8897288
    Abstract: A base station apparatus is provided, which includes a generator configured to generate a synchronization signal and a transmitter configured to transmit the generated synchronization signal. The generator is configured to generate a synchronization signal to be mapped on a subcarrier included in one of a plurality of frequency resource candidates that are separated by an interval, which is a common multiple of a determined frequency spacing and a subcarrier spacing between contiguous subcarriers, wherein the subcarrier spacing does not have a value that is a divisor of the determined frequency spacing.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: November 25, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Kenichi Miyoshi, Akihiko Nishio, Daichi Imamura, Hidetoshi Suzuki
  • Patent number: 8897200
    Abstract: When no synchronization signal is transmitted over a system bus (115), a master repeater is arbitrarily selected from a plurality of repeaters (1112 to 111n), starts transmitting a synchronization signal over the system bus (115), and transmits information to the system bus (115) in synchronization with the synchronization signal. Other slave repeaters transmit information to the system bus (115) in synchronization with the synchronization signal transmitted by the master repeater.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: November 25, 2014
    Assignee: Icom Incorporated
    Inventors: Shoji Fukuzawa, Yoshiyuki Tanaka
  • Patent number: 8891380
    Abstract: Systems and methods for synchronizing filter records between a mobile device and a network node are described herein. Upon detection of a precedence contention when installing filters at the network node, a synchronization command can be initiated to synchronize the filter records between the mobile device and the network node.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: November 18, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Shrawan K. Khatri, Ajith T. Payyappilly
  • Patent number: 8891338
    Abstract: Packet formats and associated metering infrastructure for filtering meter reading data that is being transmitted by utility meters are disclosed. In one embodiment, a method is provided of measuring the accuracy of an endpoint clock, such as a utility meter clock, from a remote device configured to capture transmissions that originate from the utility meter. Generally, the method includes synchronizing the time maintained by the utility meter with the time maintained by the remote device. The method receives and decodes a packet that includes a time stamp provided by the utility meter. Then, the method calculates the extent of the inaccuracy of the time stamp in the received packet and determines whether the extent of the inaccuracy satisfies a predetermined threshold.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: November 18, 2014
    Assignee: Itron, Inc.
    Inventors: Matthew Johnson, Mark Cornwall
  • Patent number: 8891349
    Abstract: A method of optimizing performance in a wireless communication system by transmitting a first parameter using a first channel before the optimization of one or more selected channels, wherein the first parameter comprises a modulation scheme used to optimize performance of one or more channels and a first schedule.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: November 18, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Edward Harrison Teague, Avneesh Agrawal
  • Patent number: 8891690
    Abstract: The present invention provides a method and apparatus for transmitting a preamble for multiple channel estimation. The method includes generating a channel estimation sequence, allocating the channel estimation sequence to some of a plurality of symbols in which a preamble is transmitted, and transmitting the preamble. The channel estimation sequence is generated by bisecting a sequence having a length N, generating a first sequence and a second sequence by adding a Zero-padded Suffix (ZS) having a zero value to a last part of each of the two bisected sequences, copying the first sequence and the second sequence at least once, and allocating the first sequences and the second sequences to some of the symbols.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: November 18, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jee Hoon Kim, Hyoung Kyu Song
  • Publication number: 20140334505
    Abstract: A method is provided for sending an acknowledgement frame by a receiving entity. The method includes: subsequent to reception of a data frame sent by a sending entity and including a synchronization field containing an invariant item of information known to the entities and an identification field containing information identifying the sending entity and the receiving entity, sending an acknowledgment frame including a synchronization field; and calculating a signature of a transmission channel between the sending entity and the receiving entity, the synchronization field of the acknowledgment frame being obtained on the basis of the synchronization field of the data frame, by using the signature.
    Type: Application
    Filed: January 3, 2013
    Publication date: November 13, 2014
    Inventors: Philippe Christin, Laurent Cariou, Getachew Redieteab
  • Patent number: 8885583
    Abstract: A mobile station device transmits a random access preamble, whose preamble ID is randomly selected by the mobile station device, to a base station device and performs uplink timing alignment based on the synchronization timing deviation information included in a random access response which the base station device transmits in response to the transmitted random access preamble. In an uplink synchronous status, upon receiving the random access response including timing deviation information, the mobile station device ignores the timing deviation information. Otherwise, the mobile station device performs the uplink timing alignment based on the timing deviation information.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: November 11, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Shohei Yamada, Yasuyuki Kato
  • Publication number: 20140328356
    Abstract: A method for transmitting measurement data includes receiving measurement data in a first communication module, time stamping the measurement data in the first module with a time tag, transmitting the measurement data to a second communication module via a packet switched data network, and outputting the transmitted measurement data after a predefined delay time ?tD after the time stamping of the measurement data.
    Type: Application
    Filed: July 18, 2014
    Publication date: November 6, 2014
    Applicant: ABB Technology AG
    Inventors: Dominique CACHIN, Ramon BÄCHLI, Alex GYGAX, Hermann SPIESS
  • Patent number: 8879585
    Abstract: A frame timing controller includes a timer, a frame timing control unit, and a frame pointer processing circuit. The timer is arranged to generate a timer value according to a first clock signal with a first clock frequency. The frame timing control unit is for triggering at least a receiver to start receiving transmitted information of a base station according to at least a frame pointer and the timer value, wherein the receiver processes an input signal to generate first samples at a first sampling rate corresponding to a sampling clock frequency and processes the first samples to generate an output signal including second samples at a second sampling rate corresponding to a second clock frequency of a second clock signal different from the sampling clock frequency. The frame pointer processing circuit is for generating and updating the frame pointer according to the output signal of the receiver.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: November 4, 2014
    Assignee: Mediatek Inc.
    Inventors: Den-Kai Juang, Tzu-Hao Yu
  • Patent number: 8879979
    Abstract: Techniques to seamlessly switch reception between multimedia programs are described. For “continued decoding”, a wireless device continues to receive, decode, decompress, and (optionally) display a current program until overhead information needed to decode the new program is received. For “early decoding”, the wireless device receives a user input and identifies a program with potential for user selection. The wireless device initiates decoding of the identified program, prior to its selection, so that the program can be decompressed and displayed earlier if it is subsequently selected. For time-compensated transmission, a base station transmits video and audio for a program in a manner to account for the difference between audio processing delay and video processing delay at the wireless device. This allows the wireless device to present the audio earlier during a program change, since its processing delay is shorter, and thus provide a faster response to the program change.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: November 4, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Murali Ramaswamy Chari, Gordon Kent Walker, Rajiv Vijayan
  • Patent number: 8873589
    Abstract: This invention relates to methods and devices for clock synchronization. The invention makes particular use of IEEE 1588 with offset and skew correction. In embodiments of the invention, the IEEE 1588 Precision Time Protocol is used to exchange time stamps between a time server and a client from which the client can estimate the clock offset and skew. In embodiments of the invention a free running clock at the client is provided with an estimation technique based on the time stamps from the IEEE 1588 PTP message exchange between the server and client clocks. The offset and skew from the estimation process can be combined with the local free running clock to give a synchronized local clock which is an accurate image of the master clock.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: October 28, 2014
    Assignees: Khalifa University of Science, Technology and Research, British Telecommunications plc, Emirates Telecommunications Corporation
    Inventors: James Aweya, Nayef AlSindi
  • 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: 8867400
    Abstract: A method and an apparatus for tracking a clock source are disclosed. The method includes determining a best clock source to be tracked by a device according to a best clock source tracked by a slave candidate port in the device and distributing the best clock source tracked by the device through a master candidate port in a master state. Through the embodiments of the present disclosure, the clock source selection of the device converges quickly. Moreover, because the slave candidate port is determined according to the network planning, the planning of the transport network is observed.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: October 21, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yong Cheng, Xiaodong Bao, Zhan Zhang, Yinghai He, Ning Wu
  • Patent number: 8867434
    Abstract: A network terminal has communication section that communicates with other network terminals connected via a network, time-series data creation section that, at timing set beforehand, creates time information including a correspondence between an identification number of the own network terminal and a current time measured by a timer of the own network terminal and creates time-series data registering the time information, and additional registration section that, when the communication section receives the time-series data transmitted from another network terminal, creates time information including a correspondence between the identification number of the own network terminal and a current time measured by the timer of the own network terminal and additionally registers the time information to the time-series data received this time.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: October 21, 2014
    Assignees: OMRON Corporation, The University of Tokyo
    Inventors: Takeshi Naito, Shunsuke Kamijo, Kaichi Fujimura
  • Publication number: 20140310566
    Abstract: A system and method are described for correcting for a loss of message boundary in a real-time data transmission over an interconnect between a source node and a destination node in an apparatus. In the apparatus, a destination node received one or more messages, wherein each message includes one or more data frames, and each data frame of each message includes an end-of-message flag and a message sequence number, the end-of-message flag set when the data frame is the last data frame in a particular message, and the message sequence number is different for different messages. A loss of message boundary is determined for a previous message when a new data frame of a new message is received and the new message sequence number of the new data frame is different from the previous message sequence number and a last received data frame did not include a set end-of-message flag.
    Type: Application
    Filed: October 18, 2011
    Publication date: October 16, 2014
    Applicant: ST-Ericsson SA
    Inventors: Bipin Balakrishnan, Andrei Radulescu
  • Publication number: 20140307749
    Abstract: A method for implementing an upstream symbol alignment within a network component, the method comprising receiving an upstream sync signal via an initializing digital subscriber line (DSL) during a channel discovery phase from a customer premise equipment (CPE), determining a corrected upstream symbol alignment value based upon the upstream sync signal, and transmitting the corrected upstream symbol alignment value to the CPE, wherein the upstream symbol alignment value determines an upstream symbol alignment for one or more upstream transmissions, and wherein the corrected upstream symbol alignment value is determined before receiving a plurality of upstream data signals within the data symbol positions during the channel discovery phase.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: Futurewei Technologies, Inc.
    Inventors: Haixiang Liang, Yixian Liu
  • Patent number: 8861553
    Abstract: An asynchronous master-slave serial communication system, a data transmission method, and a control module using the same are disclosed. The asynchronous master-slave serial communication system comprises a master control module and a slave control module. The master control module generates a check code according to an address information and a data information, and generates a data package according to the address information, the data information, the check code and the master clock signal. The slave control module generates a decoding data according to the data package and a slave clock signal, and generates the address information, the data information and the check code according to the decoding data.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: October 14, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Wen-Chuan Chen, Ying-Min Chen, Chia-Ching Lin, Cheng-Xue Wu, Jing-Yi Huang
  • Patent number: 8861415
    Abstract: A data transmission device has a data transmitter and a wake-up receiver. The data transmitter is activable to change from an idle state into an operating state and to execute a data transmission with a communication partner in the operating state. The wake-up receiver is implemented to be ready to receive an initiation signal during the idle state of the data transmitter and to activate the data transmitter in response to the initiation signal. The wake-up receiver is further implemented to extract data transmission information from the initiation signal to determine a time for activating the data transmitter depending on the data transmission information or to activate the data transmitter such that the data transmitter executes the data transmission depending on the data transmission information.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: October 14, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Roland Sturm, Heinrich Milosiu, Artur Grillborzer, Volker Gehrmann, Martin Tittel, Juergen Hupp, Christian Fluegel
  • Patent number: 8855145
    Abstract: Method, transmitter and computer program product for transmitting data of a real-time communication event from the transmitter to a jitter buffer of a receiver. Jitter buffer state information is received at the transmitter from the receiver, the jitter buffer state information indicating a state of the jitter buffer. At least one processing parameter is controlled based on the received jitter buffer state information, the at least one processing parameter describing how data is to be processed for transmission from the transmitter to the jitter buffer in the real-time communication event. Data is processed for transmission from the transmitter to the jitter buffer in accordance with the determined at least one processing parameter. The processed data is transmitted from the transmitter to the jitter buffer of the receiver in the real-time communication event.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: October 7, 2014
    Assignee: Microsoft Corporation
    Inventors: Renat Vafin, Mattias Nilsson, Soren Vang Andersen, Andrei Jefremov
  • Patent number: 8855102
    Abstract: A method, wireless mesh network and processor-readable storage medium for providing interoperability between devices that are capable of communicating at different data rates are disclosed herein. A start-of-frame delimiter token value in a synchronization header is used to indicate a data rate at which a device is capable of communicating. In certain embodiments, samples are collected around a bit transition and are used to adjust a bit timing of a receiving device to match a bit timing of a transmitting device using a coarse adjustment process and, in some embodiments, a fine adjustment process. In this way, compatibility can be maintained between new devices that can communicate at a relatively fast data rate and legacy devices that communicate at a lower data rate.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: October 7, 2014
    Assignee: Elster Solutions, LLC
    Inventors: Andrew J. Borleske, Brent Brian, Robert T. Mason, Jr.
  • Patent number: 8848745
    Abstract: A system, method, and computer program product for allowing a first processor to access flash or other non-volatile memory that is associated with a second processor. The first processor obtains parameters that allow the initialization of an internet protocol (IP) stack. The parameters can be obtained using the trivial file transfer protocol (TFTP), for example. The first processor communicates with the second processor using a socket protocol, sending a command word that represents either a read or write command. The command word specifies where in the non-volatile memory the access is to occur, and for how many bytes. Information is then returned to the first processor, allowing the first processor to verify the success of the access.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: September 30, 2014
    Assignee: Broadcom Corporation
    Inventors: Pinar Taskiran, Karthik Balasubramanian, Jean Cyr
  • Patent number: 8848747
    Abstract: A method for recovering an OTUk frame includes: receiving an optical signal sent by using a method of multi-lane distribution from the OTUk frame to an interface of an optical module; converting the optical signal into an electrical signal, performing electrical equalization and demodulation on the electrical signal, and recovering multi-lane data from the demodulated signal; aligning and rearranging the data on each lane, according to a lane sequence identifier included in an overhead frame header of the data on each lane; and recovering the OTUk frame according to the aligned and rearranged data. According to the present invention, lane rearrangement is performed by detecting the lane sequence identifier, and the recovery of the OTUk frame is achieved. Therefore, a training sequence overhead does not need to be additionally introduced, and the influence on the system performance is avoided.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: September 30, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Li Zeng, Chan Zhao, Changsong Xie
  • Patent number: 8848746
    Abstract: Device and methods determine timing parameters and associated timing actions from timing messages in communication packets. The timing messages may be encapsulated with a plurality of communication protocols. An example timing message may be an IEEE 1588 timing message encapsulated in an Internet protocol packet encapsulated in an Ethernet protocol packet. The protocols are matched in classifier blocks by comparing portions of the packet to bit values or ranges of values. Operation of other than the first classifier block depends on results of matching in the preceding block by using offset values passed between blocks that indicate starting points for the matching. The final classifier block matches values in timing messages to identify timing parameters and associated timing actions in the message.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: September 30, 2014
    Assignee: Vitesse Semiconductor Corporation
    Inventors: Ron Swartzentruber, Wiliam D. Lopoulos
  • Publication number: 20140286358
    Abstract: The present invention provides a system and method is disclosed for the development and maintenance of a globally distributed state session table wherein a plurality of client connections from one network are stored in a plurality of computer systems to track the aforementioned connection to one or more secondary networks. Client connection requests may originate anywhere on the Internet and server responses to such client requests may be sent asymmetrically from any other point on the Internet. The client-server connection is secured utilizing an intermediary device that acts as a transparent relay, generating a secret cookie hash for the client, such that only the data packets containing such hash are forwarded by the globally distributed system to the server.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 25, 2014
    Inventor: Mehdi Mahvi
  • Patent number: 8842994
    Abstract: A method and system of distributing clock synchronization information within an optical communications network including a plurality of network elements, in which a first network element receives an ingress clock synchronization message, the ingress clock synchronization message including a clock synchronization message identifier and a correction field. The first network element inserts the clock synchronization message identifier into an optical channel frame overhead and inserts the ingress clock synchronization message into an optical channel frame payload. The first network element transmits the optical channel frame overhead and the optical channel frame payload to a second network element, and determines a transit time of the clock synchronization message identifier across each of the network elements. The second network element updates the correction field of the ingress clock synchronization message with said transit times to form an egress clock synchronization message.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: September 23, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Sergio Lanzone, Orazio Toscano, Stefano Ruffini
  • Patent number: 8842605
    Abstract: Apparatuses may stay synchronized with a network via a beacon signal transmitted at a set interval. Communication-related activities may be planned around instances when beacon signals are expected, which may also be known as a target beacon transmission time (TBTT). Scanning opportunities, which are periods of time during which apparatuses may perform passive scanning, may be planned based on an interfere multiple of a network beacon signal interval. Apparatuses may, upon realizing a scanning opportunity, opt either to utilize the scanning opportunity or to participate in network beaconing. In example scenarios where apparatuses opt to utilize scanning opportunities, apparatuses may prepare a network information message and then enter a passive scanning mode. Apparatuses may remain in the passive scanning mode for the duration of the scanning opportunity, reacting when messages are received from devices outside of the network by transmitting the network information message.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: September 23, 2014
    Assignee: Nokia Corporation
    Inventors: Mika Kasslin, Mikko Tirronen, Kari Leppänen, Sami Virtanen, Enrico Rantala, Markku Turunen
  • Publication number: 20140269780
    Abstract: A method for maintaining a nominal decoder time phase alignment through a data drop-out period is provided. The method includes determining if a search window is open. A search-window width of the search window is an initial search-window width. The initial search-window width is larger than the width of the frame synchronization pattern. The method also includes determining if a bit clock rising edge is detected and searching for the frame synchronization pattern on a bit level when the search window is open and the bit clock rising edge is detected. If the frame synchronization pattern is not found responsive to the searching, the method also includes determining if a receipt time of the bit received when the bit clock rising edge was detected is coincident with an expected start time of the frame synchronization pattern.
    Type: Application
    Filed: January 28, 2014
    Publication date: September 18, 2014
    Applicant: Honeywell International Inc.
    Inventors: Jamal Haque, Darryl I. Parmet, Halil N. Altan, Kurt Holmquist
  • Publication number: 20140269779
    Abstract: Embodiments of a system and method for providing small data and device triggering enhancement (SDDTE) are generally described herein. In some embodiments, memory is provided for storing an SDDTE optimization container therein. A processor is coupled to the memory and is arranged to analyze an SDDTE optimization container including parameters provided therein and to perform SDDTE optimization based on the parameters. The parameters provided by the SDDTE optimization container include an SDDTE optimization timer, wherein the processor holds in the memory small data messages received during a time frame set by the SDDTE optimization timer upon receipt of a first small data message.
    Type: Application
    Filed: October 28, 2013
    Publication date: September 18, 2014
    Inventors: Chang Hong Shan, Puneet Jain