The access point of the present invention saves power consumption and attains size reduction of a mobile device that receives information. A radio base station 10a provides a connecting point for connecting a plurality of clients with the Internet 60, and stores announcement information, which is recognizable by a user terminal 20a. The user terminal 20a transmits information to and from an outlet terminal 25 by radio wave. The radio base station 10a detects the position of the user terminal 20a and the position of the outlet terminal 25, based on the receiving status of the radio wave from the user terminal 20a and the outlet terminal 25. The radio base station 10a provides the user terminal 20a with the stored announcement information when the user terminal 20a comes close to the outlet terminal 25 to be within a preset distance from the outlet terminal 25.

 
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