In optical transmission schemes of the related art, there is a problem of delay dependency on an overhead or a flow size. In a DC network and a supercomputer network, an OCS scheme and an OPS scheme remain in an examination stage. A network of the electrical packet switching is still a main stream. In a scheme of sharing links using a dedicated wavelength, a considerable number of wavelengths is also necessary to provide full connectivity. The number of wavelengths cannot be realized and an unrealistic number considering the usable number of wavelengths such as current used C bands. In an optical network and an optical transmission system of the present invention, burst mode data transmission in which a label-based switching on an exclusively reserved dedicated wavelength is used is performed. Each node has a uniquely allocated wavelength, and thus traffics coexisting in all the network nodes do not collide. By using an optical label processor, an overhead time for establishing links between nodes is unnecessary. Reuse of the same wavelength results in further decrease in the number of wavelengths.

The present invention is to provide an optical add/drop multiplexing device capable of realizing a configuration in which many transponders can be connected at low cost.

An optical add/drop multiplexing device 30A includes branch function units 34a to 34d connected to each of WSSs 22a to 22d connected to respective routes 1 to D having a plurality of optical fibers and dropping optical signals having a plurality of wavelengths among the optical signals having the respective wavelengths transmitted by wavelength division multiplexing. The optical add/drop multiplexing device includes C-function units 35a to 35d configured to transmit the optical signals branched by the branch function units 34a to 34d to a plurality of transponders. The optical add/drop multiplexing device includes optical couplers 36a to 36d each connected between a set of K WSSs 22c and 22d each having 1 input and M outputs and one of the branch function units 34a, K being a number of 2 or more, the number of optical couplers being equal to or greater than a positive integer obtained by dividing a numerical value D(M−D) by K, the numerical value being obtained by multiplying the number (M−D) of optical signals dropped by each of the WSSs 22c and 22d by the number D of all of the WSSs 22a to 22d. The optical coupler 36a couples optical signals of different wavelengths dropped by a set of WSSs into one optical signal and outputs the coupled optical signal to the branch function unit 34a.

An optical switch is proposed, for routing an optical transmission signal according to an optical control signal, including one or more optical control ports; three or more optical transmission ports; a light director; and a thermally driven light mill; where the light mill and the light director are arranged with respect to each other, to the one or more control ports and to the three or more transmission ports such that: illumination of a respective one of the one or more control ports by a control beam carrying the control signal drives the light mill to rotate towards a respective position in which the light director is arranged so as to direct a transmission beam carrying the transmission signal, entering the switch via a respective one of the transmission ports, to exit the switch via a respective other of the transmission ports.

A device and method that implements a multi-stage electrical interconnection network is provided. The electronic device includes a plurality of computing devices and a plurality of switches grouped into a plurality of groups. Switches, of the plurality of switches, in a same group are configured to be fully connected to computing devices in the same group, each of switches of the plurality of switches included in a first group among the plurality of groups is configured to have a ono-to-one connection with any one of switches included in a second group, and a connection between the computing devices in the same group and the switches in the same group and a connection between switches in in the plurality of groups are electrical connections.

A device and method that implements a multi-stage electrical interconnection network is provided. The electronic device includes a plurality of computing devices and a plurality of switches grouped into a plurality of groups. Switches, of the plurality of switches, in a same group are configured to be fully connected to computing devices in the same group, each of switches of the plurality of switches included in a first group among the plurality of groups is configured to have a ono-to-one connection with any one of switches included in a second group, and a connection between the computing devices in the same group and the switches in the same group and a connection between switches in in the plurality of groups are electrical connections.

The present invention is to provide an optical add/drop multiplexing device capable of realizing a configuration in which many transponders can be connected at low cost. An optical add/drop multiplexing device 30A includes branch function units 34a to 34d connected to each of WSSs 22a to 22d connected to respective routes 1 to D having a plurality of optical fibers and dropping optical signals having a plurality of wavelengths among the optical signals having the respective wavelengths transmitted by wavelength division multiplexing. The optical add/drop multiplexing device includes C-function units 35a to 35d configured to transmit the optical signals branched by the branch function units 34a to 34d to a plurality of transponders. The optical add/drop multiplexing device includes optical couplers 36a to 36d each connected between a set of K WSSs 22c and 22d each having 1 input and M outputs and one of the branch function units 34a, K being a number of 2 or more, the number of optical couplers being equal to or greater than a positive integer obtained by dividing a numerical value D(M−D) by K, the numerical value being obtained by multiplying the number (M−D) of optical signals dropped by each of the WSSs 22c and 22d by the number D of all of the WSSs 22a to 22d. The optical coupler 36a couples optical signals of different wavelengths dropped by a set of WSSs into one optical signal and outputs the coupled optical signal to the branch function unit 34a.

A transfer device installed between a host device and a plurality of OLTs in a communication system to which a network with a PON configuration including the plurality of OLTs between the host device and a subordinate device is applied, the transfer device including a frame information acquisition unit configured to monitor downstream frames input from the host device and calculate a statistical value of the downstream frames per a predetermined fixed cycle, a frame storage unit including a plurality of queues each configured to store downstream frames to be transferred to the plurality of OLTs, the frame storage unit configured to store the downstream frames input from the host device, a frame sorting unit configured to input the downstream frames to the plurality of queues in the frame storage unit, and a distribution control determination unit configured to determine the number of frames to be sequentially input by the frame sort unit to the plurality of queues based on the statistical value.

A transfer device installed between a host device and a plurality of OLTs in a communication system to which a network with a PON configuration including the plurality of OLTs between the host device and a subordinate device is applied, the transfer device including a frame information acquisition unit configured to monitor downstream frames input from the host device and calculate a statistical value of the downstream frames per a predetermined fixed cycle, a frame storage unit including a plurality of queues each configured to store downstream frames to be transferred to the plurality of OLTs, the frame storage unit configured to store the downstream frames input from the host device, a frame sorting unit configured to input the downstream frames to the plurality of queues in the frame storage unit, and a distribution control determination unit configured to determine the number of frames to be sequentially input by the frame sort unit to the plurality of queues based on the statistical value.

The present invention is to provide a wavelength cross-connect device that reduces device costs. A wavelength cross-connect device 10B performs relaying for changing, using WSSs, routes of optical signals transmitted from M routes 1h to Mh, in which K optical fibers 1f to Kf are grouped for each of the routes, on an input side to output the optical signals to respective optical fibers 1f to Kf of M routes 1h to Mh on an output side. Input ports of each of the optical couplers 25a to 26d are connected to output ports of each of first WSSs 21a to 22k. Further, the input ports of each of the optical couplers 25a to 26d are connected to the output ports of the first WSSs 21a to 22k and output ports of each of the optical couplers 25a to 26d are connected to input ports of second WSSs 23a to 24k such that the optical signals input from the optical fibers 1f to Kf in each of the routes 1h to Mh on the input side are capable of being output to the optical fibers 1f to Kf in each of the routes 1h to Mh on the output side, respectively.

An object of the present disclosure is to propose a technique to enumerate intermediate configurations at high speeds. A configuration enumeration device 10 according to the present disclosure enumerates a network configuration in an input layer 21, an intermediate layer 22, and an output layer 23 that minimizes the number of mechanical patch panels provided in mechanical patch panels, by using a-quasi-nonblocking configurations, where a being 0 indicates a rearrangeably nonblocking configuration and α being 1 indicates a strictly nonblocking configuration, for 0≤α≤1, when a minimum value C of wiring capacity of mechanical patch panels having the input layer 21, the intermediate layer 22, and the output layer 23 is obtained.