| 摘要 |
PROBLEM TO BE SOLVED: To provide a position estimation method of a radio terminal, the radio terminal, and a position estimation program capable of estimating position information by mutual communication between radio terminals, and heightening accuracy of the position information, even in an environment wherein a positioning radio wave cannot be received. SOLUTION: In the position estimation method of the radio terminal in a network system wherein a plurality of radio terminals are connected mutually through a radio link, the radio terminal has: the first step of holding position information of own radio terminal and a level determined by specifying accuracy of the position information in the order of highness, searching for another communicable radio terminal, and acquiring position information and a level of another radio terminal; the second step of comparing the level of another radio terminal with the level of own radio terminal; and the third step of calculating an estimated distance from own radio terminal to another radio terminal, and calculating estimated position information based on the estimated distance, when the level of own radio terminal is lower than the level of another radio terminal. COPYRIGHT: (C)2010,JPO&INPIT
|
