| 摘要 |
PROBLEM TO BE SOLVED: To provide a software wireless mobile terminal in which an original wireless communication system is immediately recovered even if a certain wireless communication system moves out of the circle or there is an erroneous operation by a user. SOLUTION: By storing software of a first wireless communication system that is a recovery source in a built-in storage device 57, a wireless memory unit 53e that executes wireless communication is rewritten into software of a second wireless communication system and if a reception level of a radio signal of the second wireless communication system is deteriorated less than a predetermined specific value or if there is an instruction from the user, even while executing wireless communication in accordance with the second wireless communication system, the software of the first wireless communication system stored in the storage device 57 is overwritten in the wireless memory unit 53e, thereby immediately recovering wireless communication in accordance with the first wireless communication system. A dedicated channel including information regarding whether the mobile terminal is located within the circle of the second wireless communication system is provided and if it is detected by a dedicated channel monitoring unit 53b that the terminal is located within the circle, the wireless memory unit 53e is rewritten into software of the second wireless communication system. COPYRIGHT: (C)2006,JPO&NCIPI
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