Wireless communication data transmission device, data transmission method, and storage medium storing data transmission program

A data transmission method performed by a data transmission device mounted in a moving object and having a wireless communication unit that performs wireless communication with an external communication device, the data transmission method comprising steps of:

• acquiring a future travel route of the moving object;
• acquiring propagation environment information of a radio wave propagation path used in the wireless communication on the future travel route;
• obtaining a moving speed of the moving object;
• converting a relationship between the future travel route and the propagation environment information into a plurality of data slots each defined by a communication speed per unit time based on the moving speed;
• allocating data to at least one of the data slots in order from a data slot among the at least one of the data slots having a highest communication speed;
• instructing the wireless communication unit to transmit the data allocated to a data slot among the at least one of the data slots that corresponds to a current time;
• and
• acquiring a remaining time of a stop signal of a traffic signal;
• wherein:
• the plurality of data slots are composed of multiple types of slots having respectively different communication speeds along the future travel route;
• and
• when the moving object is stopped according to the stop signal of the traffic signal, the converting is performed by assuming that the moving speed of the moving object increases at a constant rate up to a speed limit of the future travel route after elapse of the remaining time.

A non-transitory, computer readable, tangible storage medium storing a data transmission program executable by a data transmission device mounted in a moving object and having a wireless communication unit that performs wireless communication with an external communication device, the program comprising instructions, when executed by the data transmission device, causing the data transmission device to perform steps of:

• acquiring a future travel route of the moving object;
• acquiring propagation environment information of a radio wave propagation path used in the wireless communication on the future travel route;
• obtaining a moving speed of the moving object;
• converting a relationship between the future travel route and the propagation environment information into a plurality of data slots each defined by a communication speed per unit time based on the moving speed;
• allocating data to at least one of the data slots in order from a data slot having a highest communication speed;
• instructing the wireless communication unit to transmit the data allocated to a data slot among the data slots that corresponds to a current time;
• and
• acquiring a remaining time of a stop signal of a traffic signal;
• wherein:
• the plurality of data slots are composed of multiple types of slots having respectively different communication speeds along the future travel route;
• and
• when the moving object is stopped according to the stop signal of the traffic signal, the converting is performed by assuming that the moving speed of the moving object increases at a constant rate up to a speed limit of the future travel route after elapse of the remaining time.