| 摘要 |
A technique for providing a push delivery service is disclosed. A data center (19) transmits attribute information on positions and radii of areas A through J to a user station (1). The user station (1) compares the attribute information with a self-predicted position to predict that the user station (1) itself lies in the area A, B, ..., or J. When the user station (1) judges on the basis of a result of prediction that the user station (1) belongs to the area A, B, ..., or J, the user station (1) measures an end position L2, compares a corrected position obtained by correcting the end position L2 with each of the are as A through J to confirm that the user station (1) lies in the area A, B, ..., or J, and requests a data center (1) for delivery information attached to the area A, B, ..., or J on the basis of a result of confirmation. The data center (19) transmits delivery information to the user station (1) in response to the request. The user station (1) predict itself that the user station (1) enters into one of plural push delivery areas (areas) A through J existing therearound, so that the frequency of positioning is decreased, and pinpoint delivery of information such as shop advertisements or the like is possible. <IMAGE>
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