Methods, systems, and media for presenting contextually relevant information are provided. In some implementations, the method includes: receiving information associated with a user of a user device from multiple data sources, where the user device comprises a display; identifying, without user intervention, a relevant document based on the received information associated with the user of the user device; determining that a new browser window or a new browser tab has been opened by a browser application being executed by the user device; and causing, without user intervention, the relevant document to be presented using the new browser window or new browser tab.

Methods, systems, and media for presenting contextually relevant information are provided. In some implementations, the method includes: receiving information associated with a user of a user device from multiple data sources, where the user device comprises a display; identifying, without user intervention, a relevant document based on the received information associated with the user of the user device; determining that a new browser window or a new browser tab has been opened by a browser application being executed by the user device; and causing, without user intervention, the relevant document to be presented using the new browser window or new browser tab.

An optical transmission device includes: a receiver configured to receive a signal including data; a generator configured to generate an output clock to output the data based on a signal clock synchronized with the signal; and a controller configured to control a frequency of the output clock based on a first amount of the data so that the output clock follows a clock of a transmission source of the data.

Provided are a method and a device for implementing timeslot synchronization. The method includes: a master node performing timeslot synchronization training of an OBTN according to a timeslot length of the OBTN. By adopting the solution provided by the embodiments of the present disclosure, an FDL does not need to be considered in node design, the node design is simplified, the time precision of synchronization is improved and no loss is caused to optical efficiency.

A signal processing method executed by a transmission device, the signal processing method includes receiving a plurality of frame signals; extracting a plurality of synchronization signals each for performing frame synchronization and separating data of each of the plurality of frame signals, from the received plurality of frame signals; storing the data of each of the plurality of frame signals in a memory intermittently, using respective pulse widths of the plurality of synchronization signals as intervals, based on timing at which the plurality of synchronization signals are extracted; detecting timing at which data at a predetermined location in the frame signal is written to the memory, from the timing at which the plurality of synchronization signals are extracted; and reading data of each of the plurality of frame signals from the memory according to the detected timing.

A transmission apparatus configured to extract reception data and a first clock from a received signal and transmit the reception data based on a second clock synchronized with the first clock, the transmission apparatus includes: a detector configured to detect a frequency difference between the first clock and the second clock; a selector configured to select parallel data according to the frequency difference from a plurality of parallel data obtained by shifting bit patterns formed by bits of continuing “0” and continuing “1” by different number of the bits with each other, and a converter configured to convert the parallel data selected by the selector into serial data so as to be the second clock.

An optical receiver includes a reception module, a first detector, a second detector, a shift module, a first extraction module, and a second extraction module. The reception module receives a frame. The first detector detects a head position of a first layer, the head position being included in the frame. The second detector detects a head position of a second layer, the head position being included in the frame. The shift module shifts the frame so that the head position of the first layer and the head position of the second layer are located at respective predetermined positions. The first extraction module extracts a header of the first layer from the frame after the frame is shifted. The second extraction module extracts a header of the second layer from the frame after the frame is shifted.

The present disclosure discloses a method for remotely configuring a Precision Time Protocol PTP service of an Optical Network Unit ONU. The method includes: after an ONU performs an initialization, the ONU creates a PTP management entity; the ONU receives a PTP management entity attribute sent by an OLT and set by the OLT; and the ONU parses the PTP management entity attribute sent by the OLT and sets a corresponding PTP service according to the PTP management entity attribute. The present disclosure further discloses an ONU, an OLT and a system corresponding to the method.

In the optical transport system a transport frame generator divides a transport frame accommodating plural client signals into plural transmission signals. Subcarrier transmission units convert the signals into optical signals using different optical carriers and transmit the converted optical signals. Subcarrier reception units receive the transmitted optical signals and convert the optical signals into reception signals. A transport frame termination unit combines the reception signals to restore the transport frame. A time-demultiplexing processor time-demultiplexes the restored transport frame to be separated into the client signals. A time slot control unit determines a new time slot allocation when time-multiplexing the client signals in the transport frame and stops supply of electric power to a subcarrier transmission unit and a subcarrier reception unit that transmit and receive an optical signal to which the client signals are not allocated.

A communication system comprises a clock generator configured to generate a plurality of system clock signals used to synchronize components included in each of communication nodes in the communication system based on an external clock signal provided by an external clock source located outside the communication system and a physical layer configured to transmit any one of the generated system clock signals to a small cell communicatively connected to an end communication node of the communication system.