Patent ID: 8060107
Filing Date: 2011-11-15
Classification: G01S,H04W

Abstract:
1. A radio apparatus forming an autonomously established radio network allowing radio communication between a source and a destination, comprising: a position information generating unit generating tentative self-position information representing a tentative self-position of the radio apparatus; a position correcting unit performing a position correcting process, in which said tentative self-position is corrected such that a calculated distance, calculated based on tentative position information of one radio apparatus arbitrarily selected from m (m is an integer not smaller than 3) radio apparatuses and said tentative self-position information, between said radio apparatus and said one radio apparatus comes closer to a measured distance between said radio apparatus and said one radio apparatus, a prescribed number of times using m pieces of tentative position information of said m radio apparatuses; a position estimating unit estimating, when prescribed conditions are satisfied, the tentative self-position corrected by said position correcting unit to be the position of said radio apparatus; and a transmitting unit transmitting corrected tentative self-position information representing the tentative self-position corrected by said position correcting unit to said m radio apparatuses; wherein said position correcting unit executes sequentially, for all of said m radio apparatuses, said position correcting process relying more heavily on said calculated distance than said measured distance when said calculated distance is not longer than said measured distance detected based on a received signal intensity of a radio signal transmitted from said one radio apparatus.