| 摘要 |
PROBLEM TO BE SOLVED: To provide a position measuring system capable of performing easily initial introduction, maintenance and system expansion. SOLUTION: This terminal positioning system equipped with base stations to the number of at least (N+1) (wherein N=1 to 3) and a positioning server, for determining the position on N-dimensional coordinates of a terminal performing radio communication is described as follows: each distance between the base stations to the number of at least (N+1) is calculated; a relative coordinate of each base station is determined; the determined relative coordinate is evaluated; switching to terminal positioning processing for determining the terminal position is determined; and the terminal position is determined by using a propagation time of a radio signal transmitted/received between the terminal and the base station and the determined relative coordinate between the base stations. COPYRIGHT: (C)2007,JPO&INPIT
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