Communication control method, communication system, and transmission-side device

A communication control method for controlling a communication between a transmission-side device and a reception-side device,

• the communication control method comprising data transmission processing that transmits multiple types of transmission target data in parallel from the transmission-side device to the reception-side device by using multiple communication lines, wherein
• the data transmission processing includes:
• acquiring an available communication speed of each of the multiple communication lines;
• acquiring data priority of the multiple types of transmission target data;
• selecting the multiple communication lines one by one in sequence;
• and
• allocating the multiple types of transmission target data to the selected communication line in an order of the data priority such that the selected communication line is used up to a specified speed equal to or lower than the available communication speed of the selected communication line, wherein
• the selecting the multiple communication lines one by one in sequence includes:
• acquiring line priority of the multiple communication lines;
• and
• selecting the multiple communication lines one by one in an order of the line priority,
• an unallocated data is a transmission target data that is not allocated to any of the multiple communication lines after all specified speeds of the multiple communication lines are used up,
• a lowest priority communication line is a communication line having a lowest line priority among the multiple communication lines, and
• the data transmission processing further includes allocating the unallocated data to the lowest priority communication line beyond the specified speed of the lowest priority communication line.

A transmission-side device that transmits data to a reception-side device,

• the transmission-side device comprising a control device configured to execute data transmission processing that transmits multiple types of transmission target data in parallel to the reception-side device by using multiple communication lines, wherein
• the data transmission processing includes:
• acquiring an available communication speed of each of the multiple communication lines;
• acquiring data priority of the multiple types of transmission target data;
• selecting the multiple communication lines one by one in sequence;
• and
• allocating the multiple types of transmission target data to the selected communication line in an order of the data priority such that the selected communication line is used up to a specified speed equal to or lower than the available communication speed of the selected communication line,
• the multiple types of transmission target data include a first transmission target data and a second transmission target data whose data priority is lower than that of the first transmission target data,
• the multiple communication lines include a first communication line and a second communication line selected next to the first communication line,
• in a case where the specified speed of the first communication line is not used up after all of the first transmission target data is allocated to the first communication line, at least a part of the second transmission target data is allocated to the first communication line, and
• in a case where the specified speed of the first communication line is used up when a part of the first transmission target data is allocated to the first communication line, a remaining of the first transmission target data is allocated to the second communication line.