| 摘要 |
PROBLEM TO BE SOLVED: To report position information safely while using a general-purpose terminal. SOLUTION: When communication is performed between a terminal 3 and a server 6, a radio link is first established between the terminal 3 and a base station 2, and connected with a network access server(NAS) 4 from the base station 2 through a network 1. The position information of the base station 2 linked with the terminal 3 is transmitted to a server 6 while being put on an out band signal. The position information can be sent by utilizing a protocol in the case of connecting the terminal 3 and an internet 18 as well. The position information is extracted by the NAS 4, transmitted to the server 6 and overwritten on the data of a terminal having the same identification information in a position information DB. When there is a request from the terminal 3, based on this position information, the map information of the surrounding, for example, is retrieved by the server 6 and transmitted to the terminal 3. Besides, the information sent from the NAS 4 is stored as a NAS log. While using the NAS log, user analysis is enabled while including the position information. |
