Abstract: Operation of a PCIe Retimer over an Optical Cable has been disclosed. In one implementation a Optical Idle ordered set (OIOS) is introduced as well as a high Z ordered set (HZOS).

Abstract: A method and system is provided for clock synchronization between two devices comprising a clock. The method comprises the following steps: a step of determining a duration necessary for transmission of a data packet between the two devices, a step of sending by one of the devices a data packet containing a sending time of this packet, and a step of determining the time by the other device by adding the transmission duration to the sending time of the packet.

Abstract: In one embodiment, a timing slave packet switching device receives a received primary reference clock signal. The timing slave packet switching device communicates a first plurality of packet network synchronization packets over a packet switching network with a remote primary reference clock source and derives an over-network clock based on the first plurality of packet network synchronization packets. A phase offset between the phase of the over-network clock and the phase of the received primary reference clock signal is determined and typically stored in non-volatile storage. Subsequent to said determining the phase offset, the timing slave packet switching device communicates a second plurality of packet network synchronization packets over the packet switching network with the remote primary reference clock source and adjusts the phase of a clock derived from the second plurality of packet network synchronization packets based on the phase offset.

Abstract: In methods, systems, and devices, master and slave node timestamp synchronization units identify a node start frame delimiter of a time protocol message on transmission medium by matching patterns in the time protocol message to known start frame delimiter patterns. Master and slave node processors of such timestamp synchronization units capture a corresponding node clock time at which the node start frame delimiter is identified by referring to a corresponding node clock signal while each is identifying the node start frame delimiter. The master and slave node processors perform compensation of the node clock time by making adjustments to the node clock time for known time latency. The master and slave node timestamp synchronization units then output the node clock time as timestamps to corresponding timestamp units.

Abstract: A signaling circuit having a selectable-tap equalizer. The signaling circuit includes a buffer, a select circuit and an equalizing circuit. The buffer is used to store a plurality of data values that correspond to data signals transmitted on a signaling path during a first time interval. The select circuit is coupled to the buffer to select a subset of data values from the plurality of data values according to a select value. The equalizing circuit is coupled to receive the subset of data values from the select circuit and is adapted to adjust, according to the subset of data values, a signal level that corresponds to a data signal transmitted on the signaling path during a second time interval.

Abstract: A method and apparatus for operating a controller for a satellite communications system during inter-beam handovers. In some aspects, the controller may perform an inter-beam handover by switching communications with a user terminal from a first beam to a second beam of a satellite. The controller receives a feedback message form the user terminal, via the first beam, after the inter-beam handover is completed, and may then selectively retransmit data to the user terminal via the second beam based at least in part on the feedback message.

Abstract: A mobile unit as well as a method for time-stamping a first message of the first mobile unit to a second mobile unit are provided. The method includes the steps of: determining a roundtrip time between the first mobile unit and a base station, receiving the first message sent by the first mobile unit in the base station, adding a timestamp to the first message in the base station while taking into account the roundtrip time, and sending the time-stamped first message to the second mobile unit.

Abstract: Disclosed are a method of and system for providing time synchronization among first and second computer systems, where each of the computer systems includes hardware, operating system software and a layer of microcode operating between said hardware and said software. The method comprises the steps of using the microcode of the first computer system to provide a first timestamp, using the microcode of the second computer system to provide a second timestamp and a third timestamp, and using the microcode of the first computer system to provide a fourth timestamp. The method comprises the further steps of using the first, second, third and fourth timestamps to determine a timing difference between the first and second computer systems, and adjusting the timing among said first and second computer systems on the basis of said determined timing difference.

Abstract: A method is implemented by a network device to establish a one-way active measurement protocol (OWAMP) test session to verify that a session-sender and session-reflector support a timestamp format extension including a Precision Time Protocol Version 2 (PTPv2) timestamp format. The PTPv2 timestamp format is to be utilized in place of a Network Time Protocol (NTP) timestamp format. The network device acts as a control-client that communicates with a server to establish an OWAMP test session between the session-sender and the session-receiver.

Abstract: Method and arrangement for providing delay information to synchronization packets passing a transport network node. In a transport network node synchronization packets propagate from a synchronization master node towards boundary clock nodes. The synchronization packets pass the transport network node, in which the synchronization packets are received, and a level of delay is determined. Furthermore, when the level of delay for the synchronization packets is above a threshold, the synchronization packets are marked with a delay indication. The received synchronization packets are sent to the boundary clock node or ordinary clock node, whether or not they are marked. By implementing functionality for determining a level of delay of synchronization packets, and marking passing synchronization packets with delay indications, boundary clock nodes and ordinary clock nodes may differentiate the received synchronization packets based on the delay identifications.

Abstract: A buffer memory and display drive device are described herein. In one example, a buffer memory is arranged so that write and read address counters are controlled according to a wraparound method, and subjected to no reset in count value, which enables the avoidance of data destruction in a boundary portion of a block. In the buffer memory, block head addresses of the write and read address counters are managed centrally. So, even in the event of undesired change in count value, the influence thereof can be intercepted halfway. While reducing the memory capacity of the buffer memory which is supplied with data in blocks, the following are made possible: to prevent the deviation in read data owing to an undesired change in the address counter from lasting; and to prevent data, handled in blocks, from disappearing near a block boundary.

Abstract: A frequency calibration apparatus and method are provided. An oscillator of the frequency calibration apparatus has an operation frequency. The frequency calibration apparatus receives a plurality of time packets from an NTP server at a plurality of first time points. Each of the time packets records a second time point that the NTP server transmits the time packet. The frequency calibration apparatus calculates an offset for each of the time packets in a subset of all the time packets, calculates a clock skew according to the first time points and the offsets of the time packets in the subset, calculates a difference between the clock skew and a standard frequency value, determines that an absolute value of the difference is greater than a threshold, and adjusts the operation frequency to an initial frequency after determining that the absolute value of the difference is greater than the threshold.

Abstract: A system and method for closely synchronizing the transmission of real-time data streams is described. Synchronization data is transmitted by a cycle master for receipt by one or more cycle slaves. A cycle slave updates an internal state based on synchronization data received from the cycle master. This internal state may govern reproduction of received real-time data streams by the cycle slave. Such synchronization data may be inserted into transmitted media streams. The cycle slave internal state may be more accurately set by calculating timing differences between the cycle master and cycle slave and periodically adjusting that internal state between receipt of the synchronization data from the cycle master.

Abstract: A network device communicates with a management server that manages a shared setting value and an individual setting value as a master data. The network device includes a first receiving unit configured to receive a first instruction associated with an input from a user for the shared setting value; a second receiving unit configured to receive a second instruction indicating an initialization processing; a first requesting unit configured to make a request to the management server in accordance with the first instruction; a second requesting unit configured to request for the management server in accordance with the second instruction; an executing unit configured to execute the initialization processing in accordance with the second instruction; a query unit configured to perform a query for the management server; and a modifying and reflecting unit configured to modify and reflect the shared setting value.

Abstract: A method for supporting vehicular communication in a cellular-based communication system includes connecting at least one base station and a plurality of vehicles equipped with mobile communication devices. A centralized control entity coordinates packet transmissions of the vehicles. Adjustment of a packet transmission rate is done recursively, where parameters of packet transmission characteristics are measured and the control entity determines, based on the parameters of packet transmission characteristics, an optimal packet transmission rate. The vehicles and/or the control entity transmit packets use the optimal packet transmission rate.

Abstract: Methods, apparatus, and systems for data communication over a multi-wire, multi-phase interface are disclosed. A method for calibrating a clock recovery circuit includes recovering a first clock signal from transitions between pairs of symbols representative of successive signaling states of a 3-wire interface, where each pair of symbols includes a first symbol and a second symbol, generating a second clock signal by delaying the first clock signal by a first delay value, generating a third clock signal by delaying the second clock signal, calibrating the second clock signal and the third clock signal by initializing the first delay value such that the first sampling circuit, the second sampling circuit and the third sampling circuit capture the same symbol in a first pair of symbols, and incrementally increasing the first delay value until the second sampling circuit and the third sampling circuit capture different symbols from each pair of symbols.

Abstract: Sensor modules are triggered to start and stop the measurement approximately synchronously by sending a broadcast message. Information on the timeline of local clocks is also collected by local counters, and any relative differences in the local clocks, local sample clocks or local time stamps are rectified afterwards by means of the collected timeline information.

Abstract: Novel tools and techniques are provided for implementing network timing functionality. In some embodiments, a grand master clock(s) might receive a first timing signal from a global positioning system (“GPS”) source via a GPS antenna(s), and might send a second timing signal (which might be based at least in part on the first timing signal) to a slave clock(s), in some cases, via one or more network elements or the like. A computing system might calculate various transmission times for the second timing signal to be transmitted between the grand master clock(s) and the slave clock(s), and might calculate any time delay differences in the transmission times, might generate a third timing signal based at least in part on the calculated time delay differences (if any), and might send the third timing signal to one or more network elements, thereby providing Accurate Synchronization as a Service (“ASaaS”) functionality.

Abstract: Synchronized media streaming in a device chain including first, second and third Bluetooth media device having a controller and time synchronization algorithm. The first device formats a first media packet including received media data, second device address, and synchronization information including packet start time including a delay time and cumulative clock drift counted thus far. The second device receives the first packet and formats a second packet including the media data, third device address, updated synchronization information including the second packet's play start time, local clock time, clock drift, and a cumulative clock drift counted thus far. The second device transmits the second packet to the third device. The synchronization algorithms begin synchronized playing of the media data including the first device playing after the delay time, second device playing after the first packet's play start time, and the third device playing after the second packet's play start time.

Abstract: An apparatus in a passive optical network (PON) is configured to modify a preamble of a data packet to include channel bonding information. The apparatus may further fragment the data packet into a plurality of data frames and transmit the fragmented data frames through multiple channels. The channel bonding information may be used to identify different channels and to identify data frames transmitted through each channel.

Abstract: The enclosed embodiments relate to transmission and reception of reference signals on sub-carriers of a time frequency grid in a wireless network. Resource configuration for transmission of reference signals is obtained by a wireless device. A reference signal received power, RSRP, reference signal, RSRP-RS, is transmitted by the wireless device according to the resource configuration. The RSRP-RS is mapped to every J:th sub-carrier, where J>2. The RSRP-RS is received by a network node.

Abstract: In one example, a network controller manages a network having many network devices. Network devices can receive the timing flow port role assignments from the network controller based on the controller's global view of the network topology. The controller can also calculate timing offsets to be applied to the network devices, based on timestamp information obtained by the network devices via exchanging time synchronization protocol messages, and the controller can update time clocks on all of the network devices within a single window of time, based on a timing offsets calculated in single iteration of calculations.

Abstract: A method is provided for time synchronization in a MEMS (MicroElectroMecahnical system) based system having a MEMS processor and a plurality of MEMS devices. In a specific embodiment, the method includes, in the MEMS processor, transmitting a synchronization signal to the plurality of MEMS devices and saving a local time upon transmitting the synchronization signal. The MEMS processor also receives sampled data and time information from the plurality of MEMS devices, when the data and information become available. The method also includes, in one or more of the MEMS devices, receiving the synchronization signal from the MEMS processor and storing a local time upon receiving the synchronization signal. The MEMS device also performs a sensing operation and stores sampled sense data and sense time information.

Abstract: Embodiments of the present invention disclose a WAN interface based 1588V2 packet transmission method and apparatus, which relate to the field of communications technologies and can reduce complexity of 1588V2 packet transmission. The method includes: first, inserting, by a sending end, a 1588V2 packet into a payload area of a data frame, and sending, to a receiving end, the data frame carrying the 1588V2 packet; then, receiving, by the receiving end, the data frame that is sent by the sending end and carries the 1588V2 packet, and acquiring a receiving time at which the data frame is received; and finally, performing, by the receiving end, time synchronization adjustment on the receiving time. The embodiments of the present invention are applicable to 1588V2 packet transmission between networks.

Abstract: Provided are methods and apparatuses for measuring CSI. The method comprises: a terminal device determining whether a subframe a channel state information interference measurement resource is located on is a downlink subframe; when the subframe where the channel state information interference measurement resource is located is a downlink subframe, the terminal device executing interference measurement by using the channel state information interference measurement resource. By means of the present disclosure, the technical problem is solved that it is difficult to effectively perform the CSI measurement caused when a base station flexibly adjust uplink-downlink configuration in a related technology, thereby achieving the technical effect of improving the data transmission performance of a system.

Abstract: The method for an automatic selection of a quality of service queuing mechanism for upstream traffic on a high bandwidth access line comprises the steps of measuring the upstream rate (1) on the access line (10), and depending on that rate (20), keeping a software queuing mechanism enabled in case of an upstream rate below a defined threshold (S) (30), and disabling the software queuing mechanism in case of an upstream rate above the defined threshold (40).

Abstract: Systems and methods for improving performance in terrestrial and satellite positioning systems. Signal processing systems and methods are described for selecting, from among a set of codes, certain codes having desired autocorrelation and/or cross-correlation properties. Systems and methods for generating, encoding, transmitting, and receiving signals using the selected codes are also described.

Abstract: Representative implementations of devices and techniques provide reduced jitter and local phase detection for a controlled oscillator. An edge of a reference signal is injected at a point within the oscillator, and replaces an edge of the generated oscillation signal at the injection point. A phase difference of the injected reference signal and the oscillation signal is measured locally and is used to tune the oscillator.

Abstract: A method, management method and system for performing cell combination on a plurality of small cells are provided. In the combination method, a signal node (SN) receives position information sent from each small cell connected to the SN, and groups the small cells under a preset algorithm according to the received position information, such that small cells in a same group share a local cell serial number; a radio network connector (RNC) acquires all of the local cell serial numbers from the SN and maps each of the local cell serial numbers to a respective logical cell serial number.

Abstract: An information processing apparatus is provided which includes a transmission unit for transmitting a query request for querying another device for a count value held by such other device, a reception unit for receiving a return of the count value from such other device, a correction unit for performing, at a predetermined period, correction processing for synchronizing sampling frequency with such other device based on the received count value, and a reproduction unit for reproducing content in synchronization with such other device based on the sampling frequency. The correction unit corrects by taking into account a Round Trip Time between the transmission of the query request and the reception of the return and residual difference occurred at a previous correction time.

Abstract: A method for time synchronization in a communication network comprising a multiplicity of network nodes, wherein synchronization messages are transmitted in the communication network and the synchronization message received in a slave node contains synchronization information for synchronizing the slave time of the slave node with the master time, i.e., synchronization messages are transmitted in a closed ring or line topology and the slave node receives first and second synchronization messages from different transmission directions, and wherein the slave node synchronizes a first time with the synchronization message from one transmission direction and a second time with the synchronization message from the other transmission direction.

Abstract: A communication network includes and a communication method uses a communication node configured to use a time division multiple access protocol to allow communication in the network. The time division multiple access protocol is configured to allocate time slots. The communication node includes a main transceiver and an auxiliary transceiver. The communication node is configured to listen for a synchronization signal using the main transceiver during a first window and to listen for a synchronization signal during a second window using the auxiliary transceiver.

Abstract: A short range wireless communication (SRWC) system for a vehicle and a method of using the SRWC system. The system includes a first SRWC node in the vehicle having a SRWC receiver and a SRWC transmitter, and a second SRWC node in the vehicle adapted to send and receive SRWC data. The first and second SRWC nodes are configured so that when the first and second SRWC nodes are operable, an SRWC object device perceives the first and second SRWC nodes as a single SRWC device.

Abstract: An encoding device performing an encoding process according to an encoding scheme using a CTS indicating time at which presentation or reproduction is performed, comprising: an encapsulator that generates a media unit in which one or more access units encoded by the encoding scheme are capsulated, and a transmitter that transmits information indicating an absolute time of an access unit included at a top portion of the media unit, in addition to the media unit, wherein the encapsulator adds a CTS relative value to the nth access unit included in the media unit, the CTS relative value being a difference between the CTS of the nth access unit and the DTS of the n+1th access unit.

Abstract: A receiving device of an embodiment has a receiver, a demultiplexer, and an interference detector. The receiver receives a multiplexed signal. The demultiplexer demultiplexes the multiplexed signal into a plurality of signals. The interference detector, with referring to bit transitions of the plurality of signals in a predetermined time period, detects interference in the multiplexed signal.

Abstract: A device setting apparatus according to one aspect of the present invention includes a data transmission processor configured to automatically and collectively acquire information used in at least one another device setting apparatus as other-device information from an external storage and an other-device information storage storing the other-device information. The external storage is communicatively connectable to the device setting apparatus via a network.

Abstract: Among other things, a communication system comprising remote units, a reference timing source, a controller, a controller clock, and a remote unit clock. The remote units exchange radio frequency (RF) signals with mobile devices. The reference timing source is synchronized with a coordinated universal time (UTC) or a Global Positioning System (GPS). The controller clock is synchronized with the reference timing source and provides timing information to the controller. The remote unit clock is synchronized with the controller clock and provides timing information to a remote unit. The controller and the remote unit are configured to transmit time stamp messages to synchronize the controller clock and the remote unit clock, by avoiding contention between time stamp transmissions and baseband data transmissions or between time stamp transmissions of different remote units to the controller.

Abstract: A two-to-one multiplexor comprises a first data input configured to hold data provided from a first preceding asynchronous pipeline stage and a second data input configured to hold data provided from a second preceding asynchronous pipeline stage, a 4-phase bundled data protocol facilitating communication between the first and the second data inputs and the first and second preceding asynchronous pipeline stage, an arbitration unit connected to the first data input and the second data input, and configured to select which of the data from the first and the second data inputs is released, a request release unit, and a reset unit wherein the arbitration unit, the request release unit, and the reset unit implement and complete a second 4-phase bundled data protocol facilitating communication with a succeeding asynchronous pipeline stage for transmission of the data chosen by the arbitration unit thereby providing asynchronous multiplexing of the data.

Abstract: The present disclosure relates to a sensor network, machine type communication (MTC), machine-to-machine (M2M) communication, and technology for internet of things (IoT). The present disclosure may be applied to intelligent services based on the above technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method for detecting a counterfeit advertiser by a server includes detecting a random delay time or a cumulative interval for a reference device based on a time stamp for an advertisement packet received from the reference device, and detecting a random delay time or a cumulative interval for a receiving device other than the reference device based on a time stamp for an advertisement packet received from the receiving device.

Abstract: A method for configuring a search space within which a mobile terminal performs blind decoding attempts for potential control message candidates which may be transmitted by a base station. The frequency domain resource for which the terminal performs a blind decoding attempt for a given candidate message is determined by a pseudo-random selection (known by both terminal and network) from a pre-determined set of possible resources. A pre-determined set of resources can be different for each candidate. In one embodiment the set of resources is configured by the network for each terminal and each candidate. The method may be applied for example to ePDCCH of an LTE-A wireless communication system.

Abstract: A master device receives audio, down-mixes the audio to stereo if it is not already in stereo, and then up-mixes the stereo into as many channels as there speakers in the network. The up-mixing can be based on the number and locations of the speakers, which may be determined automatically using a real time location system such as ultra wide band (UWB) location determination techniques. The master device sends each speaker the stereo only, with each speaker also up-mixing the stereo into at least its own respective channel and in some cases into all N channels, selecting from the rendered “N” channels that result from the up-mix the channel indicated as being associated with the particular location of the particular speaker.

Abstract: A clock data recovery apparatus includes an oscillator, a sampler circuit, and a frequency control circuit. The oscillator generates a clock signal according to a bias voltage. The sampler circuit samples an input data signal to generate a sampling signal according to the clock signal. The frequency control circuit generates the bias voltage by performing integration calculation, digital-to-analog conversion, and low-pass filtering for the sampling signal.

Abstract: Various methods of allocating uplink control channels in a communication system are implemented at a resource scheduler or a user equipment (UE). In one method the scheduler reserves resources for a downlink data channel and signals a corresponding downlink data channel grant and also reserves resources for a persistent uplink control channel for a longer duration than the data channel grant. Signaling overhead associated with a grant for this persistent uplink control channel is reduced over a full dynamic grant. A predetermined rule can be used at the scheduler and at the UE to avoid overhead signaling associated with a grant for this persistent control channel. Predetermined rules at the UE and scheduler can also be used to reserve appropriate resources and select appropriate MCS levels for control information and the control information and uplink data can be transported over a common uplink channel when a time overlap occurs between an uplink data channel and the persistent control channel.

Abstract: Disclosed is a multipath time division service transmission method, comprising: calculating a channel service serial number corresponding to the time division service of each path, determining, according to the calculated channel service serial number, the channel number (CN) of a channel having service data transmission, and respectively and sequentially writing the service data and CN of the channel having service data transmission into a service data first input first output (FIFO) and a service channel index (CI) FIFO; and correspondingly, in order to read a service, respectively reading from the service data FIFO and the service CI FIFO the service data of the time division service and the CN of the channel transmitting the same. Also disclosed is a transmission device of a multipath time division service.

Abstract: Various embodiments include a time to digital converter device comprising: a medium resolution delay unit including a plurality of buffers, the medium resolution delay unit configured to receive as inputs a reference clock signal and a data clock signal and configured to output a plurality of delayed data clock signals wherein the delay between the plurality of delayed data clock signal is a medium resolution delay value; a fine resolution delay unit including a plurality of cores configured to receive as inputs the reference clock signal and the plurality of delayed data clock signals from the medium resolution delay unit, wherein the plurality of cores includes: a first bank of delays configured to receive one of the plurality of the delayed data clock signals, a second bank of delays configured to receive the reference clock signal, and; and a fast flip flop connected to the outputs of the first bank of delays and the second bank of delays, wherein the output of the fast flip flop is used to check the phas

Abstract: A multi channel semiconductor device is disclosed. The multi channel device may include a substrate, a first die on the substrate and having a first channel to function as a first chip; and a second die on the substrate and having a second channel different from the first channel to function as a second chip and including the same storage capacity and physical size as the first die. An internal interface is disposed between the first and second dies. The internal interface is configured to transmit information for controlling internal operations of the first and second dies and first applied to a first recipient die of the first and second dies to the other die.

Abstract: Method and apparatus for time or frequency synchronization of radio signals transmitted by user terminals in communication with a gateway through a satellite is provided. The satellite may be part of a non-synchronous satellite communication system, such as a low-earth orbit (LEO) satellite communication system for data, voice or video communications. Times of transmission of return link radio signals from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large time delay differentials. Carrier frequencies of return link radio signals transmitted from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large frequency offset differentials.

Abstract: A data transmission method and system, related to the field of communication, resolve the problem of data transmission in a software defined radio (SDR) system. The method includes: a data path mapping data received from an RFC to a preset unified time reference, then collecting data and caching the data obtained from collection; after the data path caches the data obtained from the collection, an event table generating a downlink data processing event, and scheduling a vector processor to perform downlink data processing. The technical solution provided in the embodiments of the present document is applied to the SDR and achieves the data transmission at high utilization rate.

Abstract: A computerized system and method for managing a passive optical network (PON) is disclosed. The system includes a detection and analysis module adapted for receiving uploaded measurement data from an optical line terminal (OLT) and at least one optical network terminal (ONT), and at least one of technical tools data, service failure data, and outside plant data. The detection and analysis module is adapted for determining a source of failure or potential failure in the PON by correlating the uploaded measurement data and the at least one of technical tools data and service failure data with information stored in a memory medium for the OLT and each ONT.

Abstract: An example method includes receiving data indicating a configuration of one or more playback devices. The one or more playback devices may include one or more transducers. The method further includes, based on the received data, associating each of one or more audio streams respectively with at least one transducer of the one or more transducers. The method further includes generating the one or more audio streams and sending at least one of the generated one or more audio streams to each of the one or more playback devices. An example non-transitory computer readable medium and an example computing device related to the example method are also disclosed herein.