Mobile communication system and wireless base station device

A mobile communication system, comprising:

• a wireless base station that measures the strength of radio waves received from a wireless terminal irrespective of whether or not the destination of the radio waves is the wireless base station itself;
• a communication network that communicably connects between said wireless base station and other wireless base stations;
• and
• a controller that creates a terminal management table that contains identification information on said wireless base station itself that measures the radio wave strength, identification information on said wireless base station corresponding to the destination of the radio waves, identification information on said wireless terminal that transmits the radio waves, and the radio wave strength measurement result, and that combines the terminal management table thus created and terminal management tables received from said other wireless base stations by using said communication network.