Control apparatus, control system, control method, and program

A control method, performed by a computer mounted on a control apparatus which controls a data transfer system including a plurality of wireless relay nodes and a plurality of transmission destination nodes, wherein the computer

• receives
• designation of a single transmission source node among the plurality of wireless relay nodes, the single transmission source node transmitting a plurality of shares obtained by dividing data based on a threshold secret sharing scheme,
• designation of a first transmission destination node and a second transmission destination node among the plurality of transmission destination nodes,
• designation of one of the wireless relay nodes, the designated wireless relay node serving as a first relay source that belongs to a first data transfer path that extends through one or more of the wireless relay nodes between the transmission source node and the first transmission destination node,
• designation of one of the wireless relay nodes, the designated wireless relay node serving as a second relay source that belongs to a second data transfer path that extends through one or more of the wireless relay nodes between the transmission source node and the second transmission destination node,
• designation of a wireless signal output value of the wireless relay node serving as the first relay source, and
• designation of a wireless signal output value of the wireless relay node serving as the second relay source;
• and
• the computer selects, in accordance with the designation of the first transmission destination node and the second transmission destination node, the designation of the wireless relay node serving as the first relay source, the designation of the wireless relay node serving as the second relay source, the designation of the wireless signal output value of the wireless relay node serving as the first relay source, and the designation of the wireless signal output value of the wireless relay node serving as the second relay source, the designations having been received by the computer, the wireless relay nodes, to set the wireless signal output values respectively in the selected wireless relay nodes, and sets the first data transfer path and the second data transfer path;
• wherein when the computer receives the designation of the wireless relay node serving as the first relay source or the designation of the wireless relay node serving as the second relay source, the computer
• refers to location-related information,
• displays, if only one of the wireless relay nodes is present as a single relay destination in a first radio wave coverage area formed when the wireless relay node serving as the first relay source or the wireless relay node serving as the second relay source outputs a wireless signal with a first wireless signal output value, the first wireless signal output value and the wireless relay node as the single relay destination on a display apparatus,
• displays, if two or more of the wireless relay nodes are present as a plurality of relay destinations in the first radio wave coverage area formed when the wireless relay node serving as the first relay source or the wireless relay node serving as the second relay source outputs the wireless signal with the first wireless signal output value, a second wireless signal output value smaller than the first wireless signal output value and the wireless relay node that is present in a second radio wave coverage area formed when the wireless signal is outputted with the second wireless signal output value on the display apparatus, and
• displays, if none of the wireless relay nodes are present as a relay destination in the first radio wave coverage area formed when the wireless relay node serving as the first relay source or the wireless relay node serving as the second relay source outputs the wireless signal with the first wireless signal output value, a third wireless signal output value larger than the first wireless signal output value and the wireless relay node that is present in a third radio wave coverage area formed when the wireless signal is outputted with the third wireless signal output value on the display apparatus.

A computer-readable non-transitory recording medium recording a program, the program causing a computer mounted on a control apparatus controlling a data transfer system including a plurality of wireless relay nodes and a plurality of transmission destination nodes to execute:

• processing for receiving
• designation of a single transmission source node among the plurality of wireless relay nodes, the single transmission source node transmitting a plurality of shares obtained by dividing data based on a threshold secret sharing scheme,
• designation of a first transmission destination node and a second transmission destination node among the plurality of transmission destination nodes,
• designation of one of the wireless relay nodes, the designated wireless relay node serving as a first relay source that belongs to a first data transfer path that extends through one or more of the wireless relay nodes between the transmission source node and the first transmission destination node,
• designation of one of the wireless relay nodes, the designated wireless relay node serving as a second relay source that belongs to a second data transfer path that extends through one or more of the wireless relay nodes between the transmission source node and the second transmission destination node,
• designation of a wireless signal output value of the wireless relay node serving as the first relay source, and
• designation of a wireless signal output value of the wireless relay node serving as the second relay source;
• processing for selecting, in accordance with the designation of the first transmission destination node and the second transmission destination node, the designation of the wireless relay node serving as the first relay source, the designation of the wireless relay node serving as the second relay source, the designation of the wireless signal output value of the wireless relay node serving as the first relay source, and the designation of the wireless signal output value of the wireless relay node serving as the second relay source, the wireless relay nodes, to set the wireless signal output values respectively in the selected wireless relay nodes, and processing for setting the first data transfer path and the second data transfer path;
• and
• processing for referring to, when the designation of the wireless relay node serving as the first relay source or the designation of the wireless relay node serving as the second relay source is received, location-related information,
• processing for displaying, if only one of the wireless relay nodes is present as a single relay destination in a first radio wave coverage area formed when the wireless relay node serving as the first relay source or the wireless relay node serving as the second relay source outputs a wireless signal with a first wireless signal output value, the first wireless signal output value and the wireless relay node as the single relay destination on a display apparatus,
• processing for displays, if two or more of the wireless relay nodes are present as a plurality of relay destinations in the first radio wave coverage area formed when the wireless relay node serving as the first relay source or the wireless relay node serving as the second relay source outputs the wireless signal with the first wireless signal output value, a second wireless signal output value smaller than the first wireless signal output value and the wireless relay node that is present in a second radio wave coverage area formed when the wireless signal is outputted with the second wireless signal output value on the display apparatus, and
• processing for displaying, if none of the wireless relay nodes are present as a relay destination in the first radio wave coverage area formed when the wireless relay node serving as the first relay source or the wireless relay node serving as the second relay source outputs the wireless signal with the first wireless signal output value, a third wireless signal output value larger than the first wireless signal output value and the wireless relay node that is present in a third radio wave coverage area formed when the wireless signal is outputted with the third wireless signal output value on the display apparatus.