发明名称 Terminal location system and positioning method
摘要 A location system of a configuration that facilitates initial introduction, maintenance, and system expansion. A terminal location system basically has at least (N+1) base station (here, N=1 to 3) and a location server and finds a position of a terminal performing wireless communication in N-dimensional coordinates. Further, the terminal location system calculates distances among the at least (N+1) base stations, finds relative coordinates of the base stations, evaluates the obtained relative coordinates, determines switching to terminal location processing of finding the position of the terminal, and finds the position of the terminal using propagation times of radio signals transmitted/received among the terminal and the base stations and the obtained relative coordinates of the base stations.
申请公布号 US2007217379(A1) 申请公布日期 2007.09.20
申请号 US20070651083 申请日期 2007.01.09
申请人 HITACHI, LTD. 发明人 FUJIWARA RYOSUKE;MIYAZAKI MASAYUKI;MIZUGAKI KENICHI
分类号 H04W64/00;H04W88/08 主分类号 H04W64/00
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