WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION SYSTEM

1 . A wireless communication method in which a plurality of moving node stations each equipped with a transmission buffer transmit data via switchable wireless communication paths, the wireless communication method comprising:

acquiring correspondence information corresponding to an amount of data transmitted by each of the node stations each time a communication status varies;

changing a cost value per unit link speed between the plurality of node stations on the basis of each piece of the acquired correspondence information;

calculating cost values among the plurality of node stations using the changed cost values; and

determining, as a communication path, a path with a minimum sum of the calculated cost values.

2 . The wireless communication method according to claim 1 ,

wherein the acquiring includes acquiring a usage rate of the transmission buffer of each of the node stations as the correspondence information.

3 . The wireless communication method according to claim 1 ,

wherein the acquiring includes acquiring, as the correspondence information, an amount of data obtained by subtracting an amount of data newly input to the node station due to switching of a communication path from the amount of data transmitted by the node station.

4 . The wireless communication method according to claim 1 ,

wherein the acquiring includes acquiring a carrier-to-noise ratio (C/N) of data received by each of the node stations as the correspondence information.

5 . The wireless communication method according to claim 1 ,

wherein the determining includes determining a predetermined specific communication path as a communication path for specific data when cost values of all communication paths calculated in the calculation step are equal to or greater than a predetermined threshold value.

6 . A wireless communication system in which a plurality of moving node stations each equipped with a transmission buffer transmit data via switchable wireless communication paths, the wireless communication system comprising:

acquisition circuitry configured to acquire correspondence information corresponding to an amount of data transmitted by each of the node stations each time a communication status varies;

changing circuitry configured to change a cost value per unit link speed between the plurality of node stations on the basis of each piece of the correspondence information acquired by the acquisition circuitry;

calculation circuitry configured to calculate cost values among the plurality of node stations using the cost values changed by the changing circuitry; and

determination circuitry configured to determine, as a communication path, a path with a minimum sum of the cost values calculated by the calculation circuitry.

7 . The wireless communication system according to claim 6 ,

wherein the acquisition circuitry acquires, as the correspondence information, at least one of a usage rate of the transmission buffer of each of the node stations, a C/N of data received by each of the node stations, and an amount of data obtained by subtracting an amount of data newly input to the node station due to switching of a communication path from the amount of data transmitted by the node station.

8 . The wireless communication system according to claim 6 ,

wherein the determination circuitry determines a predetermined specific communication path as a communication path for specific data when cost values of all communication paths calculated by the calculation circuitry are equal to or greater than a predetermined threshold value.