Fujitsu Corporation

Wataru Odashima

Shota Shinohara

Junichi Sugiyama

Hiroyuki Homma

Toru Katagiri

Hidetaka Kawahara

Hayato Furukawa

Hiromichi Makishima

Hiroyuki Kitajima

Makoto Shimizu

Yuji Obana

Kazumasa Mikami

Shingo Hotta

A transmission device to multiplex in a first signal a plurality of second signals each having a low rate as compared with the first signal, the transmission device includes: a plurality of memories to store the plurality of second signals; a selector to select one of the second signals read from the plurality of memories; and a controller to control read timing to read the plurality of second signals from the plurality of memories and signal selection timing to select the one of the second signals by the selector so as to execute rearrangement processing of the plurality of second signals read from the plurality of memories in accordance with cross-connect setting information for the plurality of second signals and shift processing of the plurality of second signals read from the plurality of memories in accordance with multiplexing positions of the plurality of second signals for the first signal.

Transmission device

A transmission apparatus includes: a first mapping unit configured to allocate a first frame that stores a client signal to an intermediate frame; a second mapping unit configured to allocate the intermediate frame to a second frame that has a higher bit rate than a bit rate of the first frame; and a rate controller configured to control a bit rate of the intermediate frame based on the bit rate of the first frame and the bit rate of the second frame.

Transmission apparatus

A transmission apparatus includes: a plurality of logical lanes; a receiver configured to receive a signal including synchronization information of a frame; a distributor configured to divide data included in the received signal into frame elements and cause the plurality of logical lanes to store the data; and a transmitter configured to transmit the data stored in the logical lanes to lines corresponding to the logical lanes. When the data is stored in the plurality of logical lanes, the distributor groups the logical lanes into a plurality of groups and associates the frame elements with the synchronization information.

A data transmission device where a low-speed signal transmission frame is included in time slots of a high-speed signal transmission frame and a number of the time slots to include the low-speed signal transmission frame is variable, wherein the time slots have respective time slot numbers, includes a storage unit storing signal data of the high-speed signal transmission frame corresponding to the number of the time slots based on a time slot number basis, wherein the signal data of the high-speed signal transmission frame are supplied on the time slot number basis; and a selection and output unit selecting and sequentially outputting the signal data on the time slot number basis, wherein the signal data have been stored in accordance with the number of the time slots.

Data transmission apparatus and data transmission method

A transmission method for transmitting a lower-speed signal transmission frame using a node device in a network by accommodating the lower-speed signal transmission frame into time slots of a higher-speed signal transmission frame includes supplying, when a number of the time slots accommodating the lower-speed signal transmission frame is to be increased, the time slots to input numbers of a cross-connection part of the node device in accordance with an order of time slot numbers of the time slots; and re-establishing cross-connections where the input numbers are cross-connected to corresponding output numbers of the cross-connection part so that the cross-connections are prevented from crossing each other, wherein the input numbers input the time slots and the output numbers output the time slots.

Transmission method and node device

A transmission apparatus for transmitting frames accommodating client data over a transmission network, comprising a clock generation unit that generates a clock for timing processing period of signal processing, a deviation detection unit that detects clock deviation between the clock generated by the clock generation unit and the clock used for timing processing period of signal processing by other transmission apparatus that receives the client data from outside the transmission network and adds them to frames, and a timing generation unit that generates timing signal of processing period of signal processing corrected with the clock deviation.

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Oyama, Japan

Wataru Odashima