POSITION INFORMATION MANAGEMENT APPARATUS, COMMUNICATION SYSTEM HAVING SAME, COMMUNICATION PROGRAM OF POSITION INFORMATION MANAGEMENT APPARATUS, AND COMMUNICATION METHOD OF POSITION INFORMATION MANAGEMENT APPARATUS

摘要

The objective of the invention is to provide a position information management apparatus, a communication system having the same, a communication program of position information management apparatus and a communication method of position information management apparatus that can prevent the latitude and longitude information of a base station from leaking to a mobile terminal apparatus having executed a position determination request including a terminal identifier different from an authorized terminal identifier. A position information management apparatus comprises: a position determination request acquiring unit (7a) that acquires a position determination request including a terminal identifier of a mobile terminal apparatus (23) and a cell identifier; a cell information acquiring unit (5b) that acquires the cell information of a cell in which a mobile terminal apparatus, which has an terminal identifier that is the same as the terminal identifier included in the position determination request, is existent; an information difference determining unit (5c) that determines whether the difference between said cell information and cell information based on the cell identifier included in the position determination request exceeds a threshold value; and a position information transmitting unit (7c) that transmits assist data if it is determined that the difference does not exceed the threshold value.