PORTABLE TERMINAL POSITION DETECTING METHOD OF MICRO CELL MOBILE COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To detect in which zone (cell) a portable terminal is located with high precision. SOLUTION: A calling control part 8 successively calls to a portable terminal through entire radio stations 1A and 1B, each base station 1A and 1B measures the delay time from transmission of a calling signal till the reception of a response signal from a portable terminal and sends existence of response of each portable terminal and measured delay time to the part 8, and the part 8 decides that the portable terminal is located in a radio zone of a radio base station whose measured delay time is the shortest when plural responses exist to one portable terminal.