Network design and determination of the arrangement of optical transmission devices in respective network stations

A network design method for designing an arrangement of optical transmission devices in stations in a linear section of a network, comprising:

• acquiring, by a computer, information concerning a type of optical transmission device applicable in the stations, respectively, and information concerning cost and transmission degradation associated with arrangement of the optical transmission devices;
• designing, by the computer, based on the information acquired at the acquiring, an arrangement of the optical transmission devices wherein the cost is lowest, the cost being lowest among arrangements wherein, between stations in which optical transmission devices applicable as optical regenerative repeaters are provided, the transmission degradation is less than or equal to a threshold;
• and
• outputting information concerning the arrangement designed at the designing, said designing comprising:
• generating, by the computer, graphical information, nodes that correspond to the optical transmission devices applicable in the stations, respectively, at least two of the generated nodes corresponding to a same one of the stations, and links that connect the nodes and to which the transmission degradation and the cost are correlated, respectively, and searching, by the computer, the graphical information for a path corresponding to the arrangement for which the transmission degradation is less than or equal to the threshold and the cost is the least, and said generating comprises:
• generating, by the computer, one or more nodes for each of the stations, the nodes corresponding to the optical transmission devices applicable in the stations, respectively,
• generating, by the computer, one or more input links to each of the nodes, wherein an input link to a given node among the nodes is from a node of a station upstream from a station of the given node, and
• computing, by the computer, the transmission degradation and the cost for each of the input links generated by said generating one or more input links.

A non-transitory computer-readable recording medium storing therein a network design program for designing an arrangement of optical transmission devices in stations in a linear section of a network and causing thea computer to execute:

• acquiring information concerning a type of optical transmission device applicable in the stations, respectively, and information concerning cost and transmission degradation associated with arrangement of the optical transmission devices;
• designing, based on the information acquired at the acquiring, an arrangement of the optical transmission devices wherein the cost is lowest, the cost being lowest among arrangements wherein, between stations in which optical transmission devices applicable as optical regenerative repeaters are provided, the transmission degradation is less than or equal to a threshold;
• and
• outputting information concerning the arrangement designed in said designing, said designing comprising:
• generating graphical information, nodes that correspond to the optical transmission devices applicable in the stations, at least two of the generated nodes corresponding to a same one of the stations, respectively, and links that connect the nodes and to which the transmission degradation and the cost are correlated, respectively, and
• searching the graphical information for a path corresponding to the arrangement for which the transmission degradation is less than or equal to the threshold and the cost is the least, and said generating comprises:
• generating one or more nodes for each of the stations, the nodes corresponding to the optical transmission devices applicable in the stations, respectively,
• generating one or more input links to each of the nodes, wherein an input link to a given node among the nodes is from a node of a station upstream from a station of the given node, and
• computing the transmission degradation and the cost for each of the input links generated by said generating one or more input links.