| 摘要 |
A position estimation apparatus (100) acquires, for base devices (102), the number of hops from a target sensor node (101) to a base device (102). The position estimation apparatus (100) calculates, for each base device (102), a distribution of estimated distances corresponding to the total hops, based on the number of hops and a distribution of estimated distances stored in a storage device (110). The position estimation apparatus (100) calculates, for each base device (102), a distribution of estimated positions within a given region (A), based on the distribution of estimated distances, information concerning a range of the given region (A), and information concerning a position of the base device (102). The position estimation apparatus (100) calculates an index that indicates a probability of a position of the target sensor node (101) within the given region (A), based on the sum of distributions of estimated positions concerning the base stations. |
