| CPC H04W 4/029 (2018.02) [G01S 5/06 (2013.01); H04B 17/318 (2015.01)] | 7 Claims |
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1. A position estimation apparatus, comprising:
a selection circuit, which, in operation:
randomly selects, as initial anchors, at least two of a plurality of radio electronic devices arranged in a region;
selects anchors from the plurality of radio electronic devices based on first information and second information; and
selects updated anchors by adding anchors newly selected based on the first information and the second information to the initial anchors and deleting anchors which were not selected based on the first information and the second information from the initial anchors, the initial anchors being used for position estimation for a mobile terminal, the first information being related to an arrangement of the plurality of radio electronic devices, the second information being related to a first position resulting from estimation of a position of the mobile terminal in the region, using the selected initial anchors; and
an estimation circuit, which, in operation:
estimates the first position of the mobile terminal based on third information related to a first received signal strength indicator (RSSI) and on the first information related to the selected initial anchors; and
estimates a second position of the mobile terminal based on fourth information related to a second RSSI and on the first information related to the updated anchors, the first RSSI being obtained by the selected initial anchors intercepting communications between the position estimation apparatus and the mobile terminal, and the second RSSI being obtained by the updated anchors intercepting communications between the position estimation apparatus and the mobile terminal.
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