| 摘要 |
PROBLEM TO BE SOLVED: To provide a database server and a mobile terminal configured such that high-speed radio communication and power-saving radio communication are used selectively for efficient radio communication and even when a method for communication having a short transmission distance while a continuous use time of a mobile terminal is lengthened is employed, the number of installed access points can be decreased. SOLUTION: The database server 1 includes a server information control section 12 which controls radio transmission and reception of information and a power-saving access point which performs power-saving radio communication with the mobile terminal 2, and the server information control section 12 converts the information into a communication signal for power-saving radio communication, transmits the communication signal from the power-saving access point 13 to the mobile terminal 2, and converts a communication signal for power-saving radio communication into information when receiving it. COPYRIGHT: (C)2007,JPO&INPIT
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