Class / Patent application number | Description | Number of patent applications / Date published |
370512000 | Synchronization information is distributed within a frame | 15 |
20080219295 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, AND CONTROL METHOD THEREOF - Data is transmitted by using continuous frames each of which includes a variable-length part having a length that varies depending on an input period and a fixed-length part containing data of one input period. The transmitted continuous frames are received, a frame period is detected, and data is reproduced based on the detected frame period. | 09-11-2008 |
20090016384 | Method and apparatus for distributing synchronization status messages over a Resilient Packet Ring (RPR) - Packets used for distributing timing information over a Resilient Packet Ring (RPR) are generated by encoding Synchronization Status Messaging (SSM) messages into IEEE 802.3ah OAM packets (or any other OAM packets, such as those defined in ITU Y.1731). Information indicating the direction that each message is to be transmitted around the RPR ring is also encoded in the packets in either the spare bits of the SSM messages or in the Type-Length-Value (TLV) bytes of the IEEE 802.3ah OAM packets or Y.1731 OAM packets. RPR protection is disabled for the packets carrying the SSM messages and the packets are transmitted to adjacent network nodes in the directions specified by the information encoded in the messages. Information encoded in received packets specifying timing quality and direction of the received messages is observed and compared to determine which timing information included in the messages to use for clock timing. | 01-15-2009 |
20090034558 | Method and system for detecting a presence and a start of a zone in a frame - The present invention provides methods and systems for detecting a start symbol of a second zone of a frame. One or more symbol indices corresponding to one or more symbols of the second zone of a frame are derived. One or more codes on pilot sub-carriers corresponding to the one or more symbol indices may also be derived. Based on the one or more symbol indices a set of possible start symbol indices is established. Thereafter, a frame is received comprising one or more of a preamble symbol, a first zone and the second zone. It is determined if the received frame comprises the second zone. If the second zone is present in the received frame, the start symbol index of the second zone of the received frame is determined based on the detection of one or more codes and the set of possible start symbol indices. The present invention further provides methods and systems for detecting a N | 02-05-2009 |
20090034559 | VIDEO APPARATUS HAVING PVR FUNCTION AND CONTROL METHOD THEREOF - A video apparatus having a personal video recorder (PVR) function and a control method thereof are provided. The video apparatus includes a counter which assigns a timestamp to a transport stream packet, a synchronization unit which extracts time information from the transport stream packet, compares the extracted time information with system time information of the video apparatus, and outputs synchronization control information, and a controller which stores an information table created using the timestamp and synchronization control information. | 02-05-2009 |
20090110006 | METHOD, APPARATUS AND SYSTEM FOR SENDING AND RECEIVING NOTIFICATION MESSAGES - A method, apparatus, and system for sending and receiving notification messages to synchronize notification messages with program streams accurately. The method for sending notification messages includes obtaining a notification message and a synchronization timestamp that are synchronous with a program, encapsulating the notification message into an RTP/RTCP packet corresponding to the synchronization timestamp, and sending the RTP/RTCP packet to a terminal. The method for decapsulating notification messages includes receiving an RTP/RTCP packet that carries a notification message and decapsulating the RTP/RTCP packet to obtain the notification message. Embodiments of the present disclosure synchronize a notification message with a program stream accurately by carrying the notification message in an RTP/RTCP packet. | 04-30-2009 |
20100020830 | TRANSPORT BITSTREAM SYNCHRONIZATION - Disclosed is a method for synchronizing a bitstream, the method comprising comparing an incoming data byte of the bitstream with a predetermined byte pattern; writing a result of the comparison to a current write address in a FIFO; calculating a difference between a current read address in the FIFO and the current write address; asserting a synchronization signal when the difference equals a predetermined value; the result of the comparison is asserted; and an output of the FIFO at the current read address is asserted. | 01-28-2010 |
20130089111 | SYNCHRONIZATION ESTABLISHING METHOD, RECEIVING DEVICE AND TRANSMITTING DEVICE - A synchronization establishing method for establishing frame synchronization in a communication system in which one frame is divided into a plurality of signal blocks, the plurality of signal blocks are transmitted in parallel and after that multiplexed and transmitted as a multiplex signal, and a plurality of signal blocks, acquired by separating the received multiplex signal, are transmitted in parallel and after that combined and formed into a format of the frame, the synchronization establishing method comprising executing a sequence for establishing synchronization of the frame. The sequence comprises inputting synchronization signals in the plurality of signal blocks that are multiplexed in the multiplex signal, detecting the synchronization signals from the plurality of signal blocks that are separated from the multiplex signal, and adjusting a phase of each of the plurality of signal blocks that are separated, based on phases of the detected synchronization signals. | 04-11-2013 |
20140177656 | TDMA Communications with Clock Synchronization - A network of nodes communicating with a central node using a Time Division Multiple Access (TDMA) communications network is disclosed. Each node can synchronize an internal clock with an internal clock of the central node when entering the TDMA communications network using a packet received from the central node. Furthermore, each node can maintain synchronization using subsequent packets communicated in the TDMA communications network and a time slot assigned for the subsequent packet. | 06-26-2014 |
20140362873 | METHOD AND A DEVICE FOR SIGNALLING TRANSMISSION TIME AND/OR A SYSTEM CLOCK - A method for signaling a time and/or clock through a header station generating a transport datastream from video and/or audio data to at least one receiver of the transport datastream calculates the time information (PCR | 12-11-2014 |
20150016478 | NETWORK DISTRIBUTED PACKET-BASED SYNCHRONIZATION - A transparent clock may be provided between edge nodes of a non-precision time protocol network, with an arrival time of a packet at an edge of the non-precision time protocol network carried in a reserved field of a packet. | 01-15-2015 |
20150063375 | COMMUNICATION DEVICE WITH PEER-TO-PEER ASSIST TO PROVIDE SYNCHRONIZATION - A system and method for timing synchronization between network nodes. The timing synchronization can conform to the Precision Time Protocol (PTP) as defined in the IEEE 1588 protocol. The timing synchronization can include the insertion of ingress and/or egress timestamps into packets. For example, timestamps can be inserted into reserved fields of the header of a packet. The timing synchronization can also include the utilization of one or more reserved fields to initiate the generation of a timestamp upon the transmission of the packet and/or the retrieval of a previously stored timestamp. | 03-05-2015 |
20150103848 | System and Method for Synchronizing a Master Clock Between Networks - Systems and methods for synchronizing clocks across networks using a time-sensitive (TS) network interface controller (NIC). The TS NIC may include a functional unit, a port, a clock, a plurality of input/output queue pairs, and a time stamp unit (TSU). The functional unit may be configured to generate synchronization packets usable by an NTS network timekeeper of a respective NTS network to synchronize the NTS network to the master clock, including using the TSU to generate time stamps for the synchronization packets in accordance with the clock synchronized to the master clock and communicate with the respective NTS network via the port using the corresponding input/output queue pair, including sending the synchronization packets to the NTS network timekeeper of the respective NTS network. | 04-16-2015 |
20150103849 | System and Method for Synchronizing a Master Clock Between Networks - System and methods for synchronizing real time networks. Systems may include a first device located on a first real time network that may include a functional unit, a port, and a plurality of output queues configured for segregation of network packets based on a mapping of one or more additional real time networks to respective output queues. For each of the one or more additional real time networks, synchronization packets may be generated based on a master clock. The packets may be usable by a network timekeeper of the additional real time network to synchronize the additional real time network to the master clock. The synchronization packets may be stored in a respective output queue based on the mapping and may be sent to the network timekeeper of the additional real time network via the port. | 04-16-2015 |
20150117471 | METHOD AND APPARATUS FOR SECURING CLOCK SYNCHRONIZATION IN A NETWORK - Aspects of the disclosure provide a method that includes receiving a first packet through a network at a first device. The first packet includes a first message generated according to a precision time protocol and a first encapsulation that encapsulates one or more fields of the first message. Further, the method includes security-verifying the first packet based on the first message and the first encapsulation, and processing the first message according to the precision time protocol after the first packet is security-verified. | 04-30-2015 |
370513000 | Plural synchronization words | 1 |
20160380714 | CODEWORD SYNCHRONIZATION FOR FIBER CHANNEL PROTOCOL - Efficient codeword synchronization methods and systems for fiber channel protocol are disclosed. The method includes identifying a codeword boundary by detecting 100-bit known patterns in a bit codeword in a transmission. | 12-29-2016 |