MOBILE COMMUNICATION SYSTEM COMPRISING MOBILE COMMUNICATION NETWORK REPEATER USED IN IN-BUILDING SYSTEM AND SERVICE METHOD THEREOF

摘要

The present invention relates to a mobile communication system having a mobile communication network relay device used in an in-building system, comprising: a master unit installed at a predetermined position in a building and drawing a radio frequency (RF) signal from a base station; It is installed by each floor and provides the service by communicating with the mobile terminals located in the service area by using the installed floor as a service area, and each one divides the overall set FA by setting only one frequency (Frequency Allocation). The relay having a plurality of slave units, and the FA of which the signal strength is large when the signal strength of the FA currently being service is smaller than the preset reference value by analyzing the signal strength of the FA currently being serviced and the signal strength of another FA. A mobile terminal requesting a change to the base station through the relay device; The mobile terminal checks the signal strength of the FA currently being serviced and checks the signal strength of another FA when the measured signal strength of the FA is less than a preset reference value, and the strength of the other FA signal is greater than the preset reference value. If large, a change request message is sent to another FA, and the base station changes the FA of the corresponding mobile terminal upon receiving the FA change request message.;In-building, relay, master, slave