| 摘要 |
A radio terminal according to the present invention comprises a data amount determination unit (135) configured to determine whether or not a total amount of data to be transmitted in the communications between all radio terminals constituting a tree-structured network and a radio base station exceeds a transmissible data amount in a communication bandwidth assigned to the communications between the communication unit and the radio base station; and a message processor (132) configured to transmit an inquiry message to the lower-level radio terminal when the data amount determination unit determines that the total data amount exceeds the transmissible data amount, the inquiring message inquiring whether or not direct communications with the radio base station are possible. |
