| 摘要 |
PROBLEM TO BE SOLVED: To provide a terminal device capable of estimating a position of a mobile body in a direction orthogonal to a travel direction on a road.SOLUTION: A terminal device (1) comprises: radio communication state acquisition units (9, 11) that acquire the radio communication states at a plurality of radio communication positions on a mobile body (23), respectively; a movement locus information creation unit (17) that creates pieces of movement locus information (K1, K2) in which each position in a movement direction of the mobile body is associated with the radio communication state for each group of the plurality of radio communication positions; a reception map acquisition unit (17) for acquiring reception maps (M1, M2) being movement locus information when the mobile body has moved in the past; and a relative position estimation unit (17) that sets a plurality of combinations of movement locus information and a reception map, compares a coincidence level in each combination with that in another combination, and thereby estimates a relative position of the mobile body to a reference movement locus (CM).SELECTED DRAWING: Figure 2 |
