Mobile terminal, control station, communication method, communication program, and control program

摘要

The following operation is carried out in order to enable a signal to a portable terminal of a destination to be relayed by another portable terminal so as to successfully reach the portable terminal of the destination. A base station 21 makes and transmits a relayable signal to a portable terminal 12, based on a received signal. Suppose another portable terminal 11 received this relayable signal. The portable terminal 11 further transmits the relayable signal, because the relayable signal is not one addressed to itself. The portable terminal 12 outside service areas 31-33 receives the relayable signal transmitted by the portable terminal 11. A service area for transmission of the relayable signal can be determined based on information about the portable terminal or other information. It is possible to change the number of relays of the relayable signal and a storage time thereof in the portable terminal.