Data receiving terminal, data distribution server, data distribution system, and data distribution method

A data distribution server having a broadcast wave sending function and a communication wave sending/receiving function, the data distribution server comprising:

• a data transmission unit for sending data to a data receiving terminal by using the broadcast wave sending function;
• a resending request receiving unit to be requested from the data receiving terminal to resend a defect portion of the data by using the communication wave sending/receiving function;
• and
• a defect portion transmission unit for sending the defect portion to the data receiving terminal according to the request for resending by using the communication wave sending/receiving function.

A data distribution system including a data receiving terminal having a broadcast wave receiving function and a communication wave sending/receiving function and a data distribution server having a broadcast wave sending function and a communication wave sending/receiving function;

• the data receiving terminal comprising:
• a broadcast wave receiving unit for receiving data from the data distribution server by using the broadcast wave receiving function;
• a repair determination unit for determining whether or not there is a defect portion in the data and, when it is determined that there is the defect portion, determining whether or not to repair the defect portion according to at least one of a communication status between the data receiving terminal and the data distribution server and a data relevant status related to the data;
• a communication wave sending/receiving unit for requesting, when the repair determination unit determines that the defect portion should be repaired, the data distribution server to resend the defect portion by using the communication wave sending/receiving function and receiving the defect portion sent from the data distribution server according to the request for resending by using the communication wave sending/receiving function;
• and
• a storage unit for storing the defect portion received by the communication wave sending/receiving unit;
• the data distribution server comprising:
• a data transmission unit for sending data to the data receiving terminal by using the broadcast wave sending function;
• a resending request receiving unit to be requested from the data receiving terminal to resend the defect portion of the data by using the communication wave sending/receiving function;
• and
• a defect portion transmission unit for sending the defect portion to the data receiving terminal according to the request for resending by using the communication wave sending/receiving function.

A data distribution method in a data distribution system including a data receiving terminal having a broadcast wave receiving function and a communication wave sending/receiving function and a data distribution server having a broadcast wave sending function and a communication wave sending/receiving function;

• the method comprising:
• a data sending step for a data transmission unit in the data distribution server to send data to the data receiving terminal by using the broadcast wave sending function;
• a broadcast wave receiving step for a broadcast wave receiving unit in the data receiving terminal to receive the data from the data distribution server by using the broadcast wave receiving function;
• a repair determination step for a repair determination unit in the data receiving terminal to determine whether or not there is a defect portion in the data and, when it is determined that there is the defect portion, determine whether or not to repair the defect portion according to at least one of a communication status between the data receiving terminal and the data distribution server and a data relevant status related to the data;
• a first communication wave sending/receiving step for a communication wave sending/receiving unit in the data receiving terminal to request, when the repair determination unit determines that the defect portion should be repaired, the data distribution server to resend the defect portion by using the communication wave sending/receiving function;
• a resending request receiving step for a resending request receiving unit in the data distribution server to be requested from the data receiving terminal to resend the defect portion of the data by using the communication wave sending/receiving function;
• a defect portion sending step for a defect portion transmission unit in the data distribution server to send the defect portion to the data receiving terminal according to the request for resending by using the communication wave sending/receiving function;
• a second communication wave sending/receiving step for the communication wave sending/receiving unit in the data receiving terminal to receive the defect portion sent from the data distribution server according to the request for resending by using the communication wave sending/receiving function;
• and
• a storage step for a storage unit in the data receiving terminal to store the defect portion received by the communication wave sending/receiving unit.