SERVER COMPUTER, POSITIONING SYSTEM, POSITIONING METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To improve positioning accuracy in identifying a position of a walking body in an environment in which no GPS can be used.SOLUTION: A server computer 3 has a storage part 32, an inter-terminal distance calculation part 34, a second position estimation part 35, a position update part 36 and a travel direction update part 37. The inter-terminal distance calculation part 34 calculates a relative distance between terminals from radio field intensities included in communication information acquired from terminals. The second position estimation part 35 estimates a position of each terminal on the basis of the relative distance between the terminals and a position of each terminal estimated from walk information acquired from each terminal. The position update part 36 updates the estimated position of a relevant terminal in the storage part to be the estimated position of the terminal respectively estimated by the second position estimation part 35. The travel direction update part 37 estimates a travel direction of the terminal from a transit of the estimated positions of the terminal and associates the estimated travel direction with the updated estimated position of the relevant terminal to store them.SELECTED DRAWING: Figure 2