Broadcast device, assisting device, coordinating device, method for charging assisting broadcast service and charging server using the same, method for collaborative direct communication and collaborative direct communication system using the same

A method for collaborative direct communication, adapted to at least one coordinating device of a collaborative direct communication system, the method comprising:

• receiving by the at least one coordinating device an assistance transmission request from a broadcast device based on a broadcast content which is to be transmitted;
• transmitting by the at least one coordinating device an assistance command to at least one assisting device in response to the assistance transmission request;
• commanding by the at least one coordinating device at least one assisting device to provide an assisting broadcast service of transmitting the broadcast content by the assistance command.

A coordinating device, comprising:

• a communication unit, configured for receiving an assistance transmission request from a broadcast device;
• and
• a processing unit, configured for generating an assistance command and a confirm signal in response to the assistance transmission request, wherein after the assistance command is generated, the communication unit transmits the assistance command to at least one assisting device to perform an assisting broadcast service.

A charging server, comprising:

• a price determination unit, configured for determining a price about an assisting broadcast service requested by a broadcast device,
• wherein when the price is accepted by the broadcast device, at least one coordinating device controls at least one assisting device to broadcast a broadcast content of the broadcast device to provide the assisting broadcast service.

A method for charging an assisting broadcast service, adapted to a charging server, the method comprising:

• determining a price about the assisting broadcast service requested by a broadcast device,
• wherein when the price is accepted by the broadcast device, at least one coordinating device controls at least one assisting device to broadcast a broadcast content of the broadcast device to provide the assisting broadcast service.