| 摘要 |
A wireless mobile station apparatus has at least first and second transmitting/receiving units whose functions can be changed by rewriting software. The wireless mobile station apparatus also has a control unit for performing alternate switching between a transmitting/receiving function and a communication counterpart station detecting function of a plurality of communication systems by a switching deciding function, to assign the transmitting/receiving function to one of the first and second transmitting/receiving units constantly. The wireless mobile station apparatus further has a storage unit for storing thereinto at least: a first set of transmitting/receiving software used in transmitting/receiving operations by a first communication system; a second set of transmitting/receiving software used in transmitting/receiving operations based on a second communication system; communication counterpart station detecting software for detecting a communication counterpart station in the second communication system; and switching deciding software for deciding on switching between the communication systems in a combination of the first and second communication systems.
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