| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide radio terminal device, communication control system and communication control method, which enable more comfortable communication by avoiding inconvenience associated with the switching of a communication system. <P>SOLUTION: A mobile telephone 1 includes: a communication switchover unit 31 for communication by selectively switching between an LTE communication system not supporting predetermined communication and a CDMA communication system supporting the predetermined communication; when call origination of the predetermined communication is requested in a state that position registration is made in the LTE communication system, if a connection to a called party is not possible, a connection capability reception unit 32 for receiving connection incapability information by the LTE communication system; after the call origination of the predetermined communication is requested, a call origination processing unit 33 for originating a voice call to the CDMA system by changing the position registration target thereto if the connection incapability information is not received, whereas terminating the call origination processing of the predetermined communication, maintaining the state that the position registration target is the LTE communication system, if the connection incapability information is received. <P>COPYRIGHT: (C)2013,JPO&INPIT |
