Wireless communication system, wireless communication method and wireless station

1 . A wireless communication system including a wireless station whose propagation path to a node station that relays wireless communication influenced by weather, the wireless communication system comprising:

a weather radar antenna that is provided in the wireless station and receives a weather radar signal transmitted from the wireless station toward the node station and reflected;

rainfall amount prediction circuitry configured to predict a rainfall amount between the wireless station and the node station on a basis of the weather radar signal received by the weather radar antenna;

quality prediction circuitry configured to predict quality of wireless communication between the wireless station and the node station on a basis of the rainfall amount predicted by the rainfall amount prediction circuitry; and

switching control circuitry configured to performs control to switch a line connecting the node station and the wireless station to another line connecting the node station and another communication station before interruption of the line in a case where the quality of the wireless communication predicted by the quality prediction circuitry is less than a predetermined threshold.

2 . The wireless communication system according to claim 1 , further comprising

extraction circuitry configured to extract data necessary for rainfall amount prediction from the weather radar signal received by the weather radar antenna; and

storage circuitry configured to store the data extracted by the extraction circuitry, wherein

the rainfall amount prediction circuitry

predicts the rainfall amount between the wireless station and the node station on a basis of the data stored in the storage circuitry.

3 . The wireless communication system according to claim 1 , further comprising

a control station that controls the wireless station and the communication station, wherein

the wireless station includes

a modem that superimposes quality information indicating that the quality of the wireless communication predicted by the quality prediction circuitry is less than the predetermined threshold on a control signal transmitted from the wireless station to the node station in a case where the quality of the wireless communication is less than the predetermined threshold, and

the control station

performs control such that the switching control circuitry performs control to switch the line when the quality information superimposed by the modem is received.

4 . A wireless communication method performed by a wireless communication system including a wireless station whose propagation path to a node station that relays wireless communication influenced by weather, the wireless communication method comprising:

predicting a rainfall amount between the wireless station and the node station on a basis of a weather radar signal received by a weather radar antenna that is provided in the wireless station and receives the weather radar signal transmitted from the wireless station toward the node station and reflected;

predicting quality of wireless communication between the wireless station and the node station on a basis of the predicted rainfall amount; and

performing control to switch a line connecting the node station and the wireless station to another line connecting the node station and another communication station before interruption of the line in a case where the predicted quality of the wireless communication is less than a predetermined threshold.

5 . The wireless communication method according to claim 4 , further comprising

extracting data necessary for rainfall amount prediction from the weather radar signal received by the weather radar antenna; and

storing the extracted data in a storage circuitry, wherein

in predicting the rainfall amount,

the rainfall amount between the wireless station and the node station is predicted on a basis of the data stored in the storage circuitry.

6 . A wireless station whose propagation path to a node station that relays wireless communication influenced by weather, the wireless station comprising:

a weather radar antenna that receives a weather radar signal transmitted toward the node station and reflected;

rainfall amount prediction circuitry configured to predict a rainfall amount between the wireless station and the node station on a basis of the weather radar signal received by the weather radar antenna;

quality prediction circuitry configured to predict quality of wireless communication between the wireless station and the node station on a basis of the rainfall amount predicted by the rainfall amount prediction circuitry; and

a modem that superimposes quality information indicating that the quality of the wireless communication predicted by the quality prediction circuitry is less than a predetermined threshold on a control signal transmitted from the wireless station to the node station in a case where the quality of the wireless communication is less than the predetermined threshold.

7 . The wireless station according to claim 6 , further comprising

extraction circuitry configured to extract data necessary for rainfall amount prediction from the weather radar signal received by the weather radar antenna; and

storage circuitry configured to store the data extracted by the extraction circuitry, wherein

the rainfall amount prediction circuitry

predicts the rainfall amount between the wireless station and the node station on a basis of the data stored in the storage circuitry.

8 . The wireless station according to claim 6 , further comprising

switching control circuitry configured to perform control to switch a line connecting the node station and the wireless station to another line connecting the node station and another communication station before interruption of the line in a case where the quality of the wireless communication predicted by the quality prediction circuitry is less than the predetermined threshold.