| 摘要 |
PROBLEM TO BE SOLVED: To prevent wasteful transmission from an access point in a radio LAN system where plural access points are installed and radio communication is performed between each of the points and a mobile station. SOLUTION: Each of access points 1a-1c is provided with a management means 21 managing the identifiers of mobile stations being communication opposite parties. When a mobile station 2a which the point 1b manages moves to the communication possible area R1 of the point 1a and a notice means 31 transmits the self-identifier, a notice means 23 transmits the identifier to all the other points based on the fact that a management means 21 does not manage the identifier that a reception means 22 receives in the point 1a and a registration means 24 registers the identifier in the management means 21. When in the point 1b, the identifier that the management means 21 manages is received from the other point 1a, a deletion means 25 deletes the identifier from the management means 21.
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